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77 results on '"Direction générale de l'armement [Bagneux] (DGA)"'

1. Probe Characterization for Electromagnetic Near-Field Studies

Author

Sylvie Jarrix, Tristan Dubois, B. Azais, D. Gasquet, Pierre Nouvel, R. Adam, Institut d’Electronique et des Systèmes ( IES ), Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Direction générale de l'armement [Bagneux] ( DGA ), Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Radiations et composants (RADIAC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Térahertz, hyperfréquence et optique (TéHO), and Direction générale de l'armement [Bagneux] (DGA)

Subjects
Electromagnetic field, Physics, Field (physics), business.industry, 020208 electrical & electronic engineering, 020206 networking & telecommunications, Near and far field, 02 engineering and technology, Electromagnetic radiation, Microstrip, [SPI.TRON]Engineering Sciences [physics]/Electronics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, Magnetic field, Optics, Electric field, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Electrical and Electronic Engineering, business, Instrumentation, Electrical conductor, ComputingMilieux_MISCELLANEOUS
Abstract

Probes used for contactless electromagnetic field capture or injection are characterized. Depending on the probe structure, they interact preferentially with the electric or magnetic field. The optimal size of the probes for broad-frequency-band measurements is investigated. However, it is shown particularly for the magnetic field probe that considerations about the size and the structures presented in this paper are not sufficient for a good discrimination between electric and magnetic fields. Then, the space resolution of near-field measurements is discussed, with application to the field capture of a microstrip line under operation.

Published
2010

2. Communication-Efficient Proactive MPC for Dynamic Groups with Dishonest Majorities

Author

Eldefrawy, Karim, Lepoint, Tancrède, Leroux, Antonin, SRI International [Menlo Park] (SRI), Direction générale de l'armement [Bagneux] (DGA), Laboratoire d'informatique de l'École polytechnique [Palaiseau] (LIX), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Geometry, arithmetic, algorithms, codes and encryption (GRACE), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-Inria Saclay - Ile de France, and Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)

Subjects
[INFO.INFO-CR]Computer Science [cs]/Cryptography and Security [cs.CR]
Abstract

International audience; Secure multiparty computation (MPC) has recently been increasingly adopted to secure cryptographic keys in enterprises, cloud infrastructure, and cryptocurrency and blockchain-related settings such as wallets and exchanges. Using MPC in blockchains and other distributed systems highlights the need to consider dynamic settings. In such dynamic settings, parties, and potentially even parameters of underlying secret sharing and corruption tolerance thresholds of sub-protocols, may change over the lifetime of the protocol. In particular, stronger threat models-in which mobile adversaries control a changing set of parties (up to t out of n involved parties at any instant), and may eventually corrupt all n parties over the course of a protocol's execution-are becoming increasingly important for such real world deployments; secure protocols designed for such models are known as Proactive MPC (PMPC). In this work, we construct the first efficient PMPC protocol for dynamic groups (where the set of parties changes over time) secure against a dishonest majority of parties. Our PMPC protocol only requires O(n 2) (amortized) communication per secret, compared to existing PMPC protocols that require O(n 4) and only consider static groups with dishonest majorities. At the core of our PMPC protocol is a new efficient technique to perform multiplication of secret shared data (shared using a bivariate scheme) with O(n √ n) communication with security against a dishonest majority without requiring pre-computation. We also develop a new efficient bivariate batched proactive secret sharing (PSS) protocol for dishonest majorities, which may be of independent interest. This protocol enables multiple dealers to contribute different secrets that are efficiently shared together in one batch; previous batched PSS schemes required all secrets to come from a single dealer.

Published
2022

3. IntegronFinder 2.0: identification and analysis of integrons across Bacteria, with a focus on antibiotic resistance in Klebsiella

Author

Bertrand Néron, Eloi Littner, Matthieu Haudiquet, Amandine Perrin, Jean Cury, Eduardo Rocha, Hub Bioinformatique et Biostatistique - Bioinformatics and Biostatistics HUB, Institut Pasteur [Paris] (IP)-Université Paris Cité (UPCité), Génomique évolutive des Microbes / Microbial Evolutionary Genomics, Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Direction générale de l'armement [Bagneux] (DGA), Collège Doctoral, Sorbonne Université (SU), Ecole Doctorale Frontiere de l’Innovation en Recherche et Education (ED 474 FIRE), Université Paris Cité (UPCité)-Université Paris sciences et lettres (PSL), Laboratoire Interdisciplinaire des Sciences du Numérique (LISN), Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Work allowing the development of IntegronFinder was funded by INCEPTION project (Agence National de la Recherche: ANR-16-CONV-0005), the Fondation pour la Recherche Médicale (EQU201903007835), and the Laboratoire d’Excellence IBEID Integrative Biology of Emerging Infectious Diseases (Agence National de la Recherche: ANR-10-LABX-62-IBEID). E.L. is supported by the Direction Générale de l’Armement (DGA)., We thank input on IntegronFinder from the many users that have alerted us to issues or made suggestions of improvement. This work used the computational and storage services (TARS cluster) provided by the IT department at Institut Pasteur, Paris. We thank Fabien Mareuil for the IntegronFinder integration in galaxy@pasteur., ANR-16-CONV-0005,INCEPTION,Institut Convergences pour l'étude de l'Emergence des Pathologies au Travers des Individus et des populatiONs(2016), and ANR-10-LABX-0062,IBEID,Integrative Biology of Emerging Infectious Diseases(2010)

Subjects
Microbiology (medical), integron, antibiotic resistance, bioinformatics, biochemical phenomena, metabolism, and nutrition, bacterial infections and mycoses, Microbiology, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, [SDV.BIBS]Life Sciences [q-bio]/Quantitative Methods [q-bio.QM], genomics, Virology, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, bacteria
Abstract

Integrons are mobile genetic elements that contain multiple cassettes encoding accessory genes whose order is shuffled by a specific integrase. Integrons within mobile genetic elements often contain multiple antibiotic resistance genes that they spread among nosocomial pathogens and contribute to the current antibiotic resistance crisis. However, most integrons are presumably sedentary and encode a much broader diversity of functions. IntegronFinder is a widely used software to identify novel integrons in bacterial genomes, but has aged and lacks some useful functionalities to handle very large datasets of draft genomes or metagenomes. Here, we present IntegronFinder version 2. We have updated the code, improved its efficiency and usability, adapted the output to incomplete genome data, and added a few novel functions. We describe these changes and illustrate the relevance of the program by analyzing the distribution of integrons across more than 20,000 fully sequenced genomes. We also take full advantage of its novel capabilities to analyze close to 4 thousand Klebsiella pneumoniae genomes for the presence of integrons and antibiotic resistance genes within them. Our data shows that K. pneumoniae has a large diversity of integrons and the largest mobile integron in our database of plasmids. The pangenome of these integrons contains a total of 165 different gene families with most of the largest families being related with resistance to numerous types of antibiotics. IntegronFinder is a free and open-source software available at https://github.com/gem-pasteur/Integron_Finder.

Published
2022

4. Reliability Assessment Of AlGaN/GaN HEMTs on the SiC Substrate Under the RF Stress

Author

Eric Joubert, Niemat Moultif, Christian Moreau, Olivier Latry, Jean-Francois Goupy, Mohamed Ndiaye, Patrick Carton, Groupe de physique des matériaux (GPM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Centre d’Essai en Vibro-Acoustique pour l’Automobile (CEVAA), Direction générale de l'armement [Bagneux] (DGA), Thales Air Systems, Thales Group [France], Thales Global Services, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), and THALES [France]

Subjects
Materials science, business.industry, Transconductance, 020208 electrical & electronic engineering, Transistor, Wide-bandgap semiconductor, 02 engineering and technology, law.invention, [SPI.TRON]Engineering Sciences [physics]/Electronics, Stress (mechanics), Reliability (semiconductor), Impurity, law, Microscopy, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, Degradation (geology), Electrical and Electronic Engineering, business, ComputingMilieux_MISCELLANEOUS
Abstract

This article reports a reliability study on AlGaN/GaN high-electron-mobility transistors under the RF stress. It shows a stabilization of the gate contact after the aging test. However, the degradation of RF performances and dc parameters is noticed. The degradations are mainly due to bulk traps located between gate–source or gate–drain and caused by hot-electron effects. The trap-related phenomena results in a reduction of the drain current and RF output power accompanied with transconductance degradation and pinch-off shift. These traps are characterized by gate-lag and drain-lag measurements and spectral photon emission microscopy. Photo emission measurements reveal an inhomogeneous distribution of light and the presence of native traps that could be related to crystallographic defects such as dislocations or impurities.

Published
2021

5. SimROS: a simulator for the design of HF surface wave radar - Application to maritime target detection

Author

N. Ticaud, G. Auffray, S. Saillant, Yannick Beniguel, Alain Reineix, Nicolas Bourey, P. Dorey, Q. Herbette, Marc Helier, Muriel Darces, Sebastien Reynaud, Christophe Guiffaut, M. Menelle, Philippe Pouliguen, XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), Laboratoire Génie électrique et électronique de Paris (GeePs), CentraleSupélec-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre d'Ingénierie des Systèmes en Télécommunication, en ÉlectroMagnétisme et en Electronique (CISTEME), DEMR, ONERA, Université Paris Saclay [Palaiseau], ONERA-Université Paris-Saclay, Informatique electromagnétisme électronique analyse (IEEA), entreprise, and Agence de l'innovation de la défense (AID)

Subjects
Reciprocity principle, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, 020206 networking & telecommunications, 02 engineering and technology, Sea state, law.invention, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, Link budget, Surface wave, law, 0202 electrical engineering, electronic engineering, information engineering, Clutter, Radar, Large distance, Geology, Remote sensing
Abstract

International audience; High Frequency (HF) radars allow the surveillance of wide zones at large distance. Their design and performance analysis require a numerical tool able to represent complex environments to model the wave propagation in realistic conditions. Particularly, in the framework of maritime surveillance, sea state model as well as sea clutter need to be considered to evaluate the radar link budget.

Published
2021

6. SÉTA: Supersingular Encryption from Torsion Attacks

Author

Luca De Feo, Cyprien Delpech de Saint Guilhem, Tako Boris Fouotsa, Péter Kutas, Antonin Leroux, Christophe Petit, Javier Silva, Benjamin Wesolowski, Direction générale de l'armement [Bagneux] (DGA), Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria), Laboratoire d'informatique de l'École polytechnique [Palaiseau] (LIX), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Geometry, arithmetic, algorithms, codes and encryption (GRACE), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire d'informatique de l'École polytechnique [Palaiseau] (LIX), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Lithe and fast algorithmic number theory (LFANT), Institut de Mathématiques de Bordeaux (IMB), Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1 (UB)-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1 (UB)-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Inria Bordeaux - Sud-Ouest, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Università degli Studi Roma Tre = Roma Tre University (ROMA TRE), Eötvös Loránd University (ELTE), University of Birmingham [Birmingham], École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-Inria Saclay - Ile de France, Université libre de Bruxelles (ULB), Universitat Pompeu Fabra [Barcelona] (UPF), Centre National de la Recherche Scientifique (CNRS), Mehdi Tibouchi, and Huaxiong Wang

Subjects
[INFO.INFO-CR]Computer Science [cs]/Cryptography and Security [cs.CR], 010201 computation theory & mathematics, 010103 numerical & computational mathematics, 0102 computer and information sciences, 0101 mathematics, 01 natural sciences
Abstract

International audience; We present Séta, 11 a new family of public-key encryption schemes with post-quantum security based on isogenies of supersingular elliptic curves. It is constructed from a new family of trapdoor one-way functions, where the inversion algorithm uses Petit's so called torsion attacks on SIDH to compute an isogeny between supersingular elliptic curves given an endomorphism of the starting curve and images of torsion points. We prove the OW-CPA security of Séta and present an IND-CCA variant using the post-quantum OAEP transformation. Several variants for key generation are explored together with their impact on the selection of parameters, such as the base prime of the scheme. We furthermore formalise an "uber" isogeny assumption framework which aims to generalize computational isogeny problems encountered in schemes including SIDH, CSDIH, OSIDH and ours. Finally, we carefully select parameters to achieve a balance between security and run-times and present experimental results from our implementation.

Published
2021
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7. Click chemistry: an efficient tool to control the functionalization of metallic surfaces with alkyl chains possessing two reactive end groups

Author

Mathieu Koudia, Vikas Jangid, Gérard Berginc, David Duché, Chrystelle Lebouin, Anil Kumar Bharwal, Damien Brunel, Jean-Jacques Simon, Didier Gigmes, Thierry Buffeteau, Rose Marie Sauvage, Ludovic Escoubas, Mathieu Abel, Esteban Sanchez Adaime, Frédéric Dumur, Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Matériaux divisés, interfaces, réactivité, électrochimie (MADIREL), Direction générale de l'armement [Bagneux] (DGA), Thalès Optronique, Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), and Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, General Physics and Astronomy, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Contact angle, chemistry.chemical_compound, XPS, Molecule, Alkyl, surface functionalization, chemistry.chemical_classification, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Surfaces and Interfaces, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Combinatorial chemistry, 0104 chemical sciences, Surfaces, Coatings and Films, PM-IRRAS, Ferrocene, chemistry, Click chemistry, Surface modification, Click Chemistry, Azide, Cyclic voltammetry, 0210 nano-technology
Abstract

International audience; Major challenges in the design of devices based on self-assembled monolayers (SAMs) standing in sandwich between two electrodes rely in SAMs of high quality and to simultaneously self-assemble them between two different electrodes, especially in case of Metal-Molecule-Metal junction devices. In this study, we demonstrate the synthesis and the characterization of two ferrocene-based functional molecules with two active thiol/thiol-acetate anchoring groups which could be used to bind with two different electrodes. To control the orientation of the molecules at the surface of the bottom electrode, a Copper catalysed Alkyne Azide Cycloaddition (CuAAC) (click chemistry) approach is applied on ultra-smooth template stripped gold substrates. Self-assembly of the two molecules could be obtained in two consecutive steps enabling us to control the orientation and the regularity of the SAMs. Cyclic voltammetry results shows that the SAMs obtained by mean of the two-step procedure are of high quality with more than 60% of the gold surface covered by molecules. We further investigated the SAMs by PM-IRRAS, XPS, ellipsometry and contact angle measurements to investigate the presence of functional groups, individual elements and succession of the click reaction on surface.

Published
2021

8. Contactless Antenna Gain Pattern Estimation From Backscattering Coefficient Measurement Performed Within Reverberation Chambers

Author

François Sarrazin, Ariston Reis, Philippe Besnier, Elodie Richalot, Philippe Pouliguen, Electronique, Systèmes de communication et Microsystèmes (ESYCOM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel, Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Defense Innovation Agency (AID) of French Ministry of Armed Forces, and Nantes Université (NU)-Université de Rennes 1 (UR1)

Subjects
Physics, Reverberation, Anechoic chamber, Main lobe, Acoustics, 020206 networking & telecommunications, 02 engineering and technology, antenna backscattering coefficient, Reverberation chamber, Radiation pattern, law.invention, radar cross-section, structural mode, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, antenna gain, law, radiation mode, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, Antenna (radio), Antenna gain, Vivaldi antenna, Electromagnetic reverberation chamber
Abstract

International audience; This paper presents the antenna gain pattern estimation from backscattering coefficient measurement performed within a reverberation chamber (RC). The antenna backscattering coefficient is measured for two load conditions, namely an open circuit and a 50 Ω load, enabling to distinguish the radiation and structural modes from the total backscattered field. This approach is applied to the measurement of the gain pattern of a Vivaldi antenna at 6.5 GHz and compared to a conventional transmission-type measurement within an anechoic chamber. The main lobe of the radiation pattern is in good agreement between both measurements. The difference between maximal gains, retrieved after a reference measurement using a metallic plate, is equal to 0.04 dB. A second validation is performed using a log-periodic antenna at 3.5 GHz, showing less than 0.76 dB difference over the measured angular range. To the author's knowledge, this is the first time that a contactless gain pattern measurement is performed and validated within an RC.

Published
2021

9. La norme afnor x50 144-3, une évolution majeure pour la construction de sévérités d’essais vibratoires de qualification

Author

Lelan, Pascal, Colin, Bruno, Direction générale de l'armement [Bagneux] (DGA), and NEXTER Systems

Subjects
Qualification expérimentale, [SPI]Engineering Sciences [physics], AFNOR X50-144, Personnalisation d'essais, Profil de vie, Environnement
Abstract

International audience; La nouvelle édition de la norme AFNOR X50 144-3 publiée en 2020, traitant de la tenue aux environnements mécaniques a fait l'objet d'une restructuration complète qui redéfinit totalement la méthodologie utilisée jusqu'à présent. Basée sur la valorisation de mesure in situ, cette nouvelle approche présente une démarche universelle capable de traiter tous types de chargements vibratoires auxquels un système est soumis tout au long de son profil de vie.

Published
2020

10. Modélisation stochastique et extrapolation temporelle des chargements vibratoires par l’approche MBD

Author

Colin, Bruno, Lelan, Pascal, NEXTER Systems, and Direction générale de l'armement [Bagneux] (DGA)

Subjects
[SPI]Engineering Sciences [physics], MBD, TVE et TCL, Personnalisation d’essais, Synthèses déterministe et stochastique, L-Moments, ComputingMilieux_MISCELLANEOUS, Fiabilité fonctionnelle et structurelle, Inférence statistique
Abstract

International audience

Published
2020

11. Collecte et exploitation du retour d’expérience en sûreté de fonctionnement des systèmes et équipements

Author

Meunier, Sylvain, Clement, Olivier, Direction générale de l'armement [Bagneux] (DGA), and Naval Group

Subjects
norme, collecte, [SPI]Engineering Sciences [physics], processus, retour d'expérience, fiabilité, exploitation
Abstract

International audience; Cette communication présente un processus de collecte et d'exploitation du retour d'expérience issue de la norme NF C20-312 [1] publiée en 2020. Ce processus, adapté à tous les domaines (transport, énergie, défense, télécommunications…), s'articule autour de différentes activités qui seront décrites succinctement.

Published
2020

12. Radar Cross Section Measurement within Reverberation Chamber: Stirrer position issues

Author

Jerome Sol, Ariston Reis, Philippe Besnier, Elodie Richalot, Philippe Pouliguen, Francois Sarrazin, Electronique, Systèmes de communication et Microsystèmes (ESYCOM), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Université Paris-Est Marne-la-Vallée (UPEM)-ESIEE Paris, Direction générale de l'armement [Bagneux] (DGA), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Université Paris-Est Marne-la-Vallée (UPEM)-ESIEE Paris, Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Université de Nantes (UN)-Université de Rennes 1 (UR1)

Subjects
Physics, Signal Processing (eess.SP), Radar cross-section, Metallic Object, Anechoic chamber, Radar Cross Section, Acoustics, 020208 electrical & electronic engineering, 020206 networking & telecommunications, 02 engineering and technology, Reverberation Chamber, [SPI.TRON]Engineering Sciences [physics]/Electronics, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, Position (vector), 0202 electrical engineering, electronic engineering, information engineering, FOS: Electrical engineering, electronic engineering, information engineering, Physics::Accelerator Physics, Electrical Engineering and Systems Science - Signal Processing, Antenna (radio), measurements, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Electromagnetic reverberation chamber
Abstract

International audience; This paper presents the evaluation of the Radar Cross Section (RCS) of a metallic object by measurements accomplished within the diffuse-field environment produced by a Reverberation Chamber (RC). The method is based on the extraction of the ballistic wave between the antenna and the target that is mixed with the backscattering response of the RC. A good agreement is obtained when compared with classical RCS measurement inside an anechoic chamber. This communication also highlights the potential stirrer positioning issues and their impact on the retrieved RCS accuracy.

Published
2020

13. Reconfigurable Grounded Vector Antenna for 3-D Electromagnetic Direction-Finding Applications

Author

Johan Duplouy, Philippe Pouliguen, Patrick Potier, Christopher Djoma, Hervé Aubert, Christophe Morlaas, Ecole Nationale de l'Aviation Civile (ENAC), Équipe MIcro et Nanosystèmes pour les Communications sans fil (LAAS-MINC), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), DGA Mission Recherche et Innovation Scientifique (DGA MRIS), DGA, DGA Maîtrise de l'information (DGA.MI), Direction générale de l'Armement (DGA), Direction générale de l'armement [Bagneux] (DGA), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées

Subjects
Physics, Reconfigurable antenna, Direction finding, vector sensor, Acoustics, 020208 electrical & electronic engineering, 020206 networking & telecommunications, 02 engineering and technology, law.invention, Antenna efficiency, direction-of- arrival antenna, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, Dipole, law, 0202 electrical engineering, electronic engineering, information engineering, Vivaldi antennas, wideband magnetic and electric dipoles, reconfigurable antenna, Dipole antenna, Electrical and Electronic Engineering, Wideband, Antenna (radio), Magnetic dipole, Computer Science::Information Theory
Abstract

International audience; In this letter, a reconfigurable grounded wideband antenna is proposed in view of vector sensor applications. This antenna combines two orthogonal and colocated semi-circular arrays of Vivaldi antennas mounted over a metallic support. The radiation patterns of two wideband magnetic dipoles and one wideband electric dipole can be synthesized thanks to an appropriate antenna excitation. Measurement results are in good agreement with the simulated results obtained from full-wave electromagnetic simulations. The proposed antenna exhibits stable radiation patterns over a wide impedance bandwidth of 1.69:1, a high radiation efficiency and a good isolation between the antenna input ports. This antenna is a good candidate for wideband 3D direction finding using a vector sensor.

Published
2018

14. Long term accelerated ageing of an ASIC dedicated to cryptographic application

Author

Aurelien Janvresse, Romain Guetard, Antonin Pastre, Suzel Lavagne, Pierre Lebosse, Julien Coutet, Michel Sarlotte, E. Doche, Franck Bayle, C. Moreau, François Marc, Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), THALES COMMUNICATIONS & SECURITY, THALES, Centre d'élaboration de matériaux et d'études structurales (CEMES), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Thales Research and Technology [Palaiseau], Direction générale de l'armement [Bagneux] (DGA), Thales Avionics SAS, Valence, France, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), THALES [France], Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Computer science, Cryptography, 02 engineering and technology, 01 natural sciences, Application-specific integrated circuit, Stress test, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Safety, Risk, Reliability and Quality, Reliability (statistics), ComputingMilieux_MISCELLANEOUS, 010302 applied physics, business.industry, 020208 electrical & electronic engineering, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Calculation methods, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Term (time), Reliability engineering, [SPI.TRON]Engineering Sciences [physics]/Electronics, Overvoltage, Node (circuits), business
Abstract

This paper deals with data analysis of long term (2 years) accelerated stress test of a 65 nm ASIC dedicated to cryptographic applications. Several stress conditions have been applied by combining both thermal and electrical overvoltage stresses. At the end of the ageing test, frequency drifts analysis indicates the presence of NBTI. Two statistical calculation methods have been considered in estimating the mean or median time to failure, each one relying on a different failure criterion. We confirm reliability of 65 nm technologic node even in complex architecture.

Published
2019

15. An Empirical Model of the Effects of Ionospheric Electron Density Variations on HF Radar Processing

Author

Florent Jangal, Marie Jose Abi Akl, Muriel Darces, Marc Hélier, DEMR, ONERA, Université Paris Saclay (COmUE) [Palaiseau], ONERA-Université Paris Saclay (COmUE), Direction générale de l'armement [Bagneux] (DGA), Laboratoire d'Electronique et Electromagnétisme (L2E), and Sorbonne Université (SU)

Subjects
Physics, Electron density, Total electron content, 020208 electrical & electronic engineering, 020206 networking & telecommunications, 02 engineering and technology, Filter (signal processing), Condensed Matter Physics, Signal, Electronic, Optical and Magnetic Materials, Computational physics, law.invention, Ray tracing (physics), symbols.namesake, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, law, 0202 electrical engineering, electronic engineering, information engineering, symbols, Electrical and Electronic Engineering, Ionosphere, Radar, Doppler effect
Abstract

International audience; The High Frequency hybrid radar mode combines sky and surface wave propagation. As all High Frequency radars, it can be impacted by ionospheric instabilities. A behavioral model able to include ionospheric spatial and temporal variations has been implemented to estimate the impact of ionospheric irregularities on radar signal processing and Doppler-distance images. In this work, probabilistic models of the ionospheric fluctuations in the ray tracing have been introduced using the phase path fluctuation only. Based on Shkarofsky’s spectral power density, random variations on some parameters of Booker’s electron density profile have been performed to generate disturbed electron density profiles. Afterwards, a propagation delay, integrated in the received radar signal, has been calculated in terms of phase path variation. Moreover, the temporal aspect of the ionospheric variations has been macroscopically implemented by a filtering step according to the Total Electron Content variation. Results of this simulation are presented with the corresponding statistics. Doppler and distance distributions have been computed for several filter cut-off frequency values and for different Shkarofsky’s spectral power density parameters. At last, the process described above works properly: its results have been successfully compared with actual radar data for this purpose.

Published
2019

16. SimROS : Un logiciel pour le dimensionnement d’un radar HF de détection maritime à ondes de sol

Author

Reineix, Alain, Guiffault, Christophe, Bourey, Nicolas, Darces, Muriel, Hélier, Marc, Reynaud, Sébastien, Ticaud, Nicolas, Dorey, Philippe, Auffray, Gilbert, Saillant, Stéphane, Herbette, Quentin, Menelle, Michel, Beniguel, Yannick, Philippe, Pouliguen, XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), Laboratoire Génie électrique et électronique de Paris (GeePs), CentraleSupélec-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), CISTEME, DEMR, ONERA, Université Paris Saclay [Palaiseau], ONERA-Université Paris-Saclay, Informatique electromagnétisme électronique analyse (Entreprise) (IEEA), Agence de l'innovation de la défense (AID), and Gomez, Pascal

Subjects
[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, [SPI.ELEC] Engineering Sciences [physics]/Electromagnetism, ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
2019

17. New interesting way to rectify current thanks to Ferrocenyl Triazole derivatives

Author

Brunel, Damien, Reynaud, Clément, Jangid, Vikas, Lebouin, Chrystelle, Duché, David, Simon, Jean-Jacques, Escoubas, Ludovic, Sauvage, Rose-Marie, Gigmes, Didier, Dumur, Frédéric, Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Matériaux divisés, interfaces, réactivité, électrochimie (MADIREL), Direction générale de l'armement [Bagneux] (DGA), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), and BRUNEL, Damien

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [CHIM] Chemical Sciences, [CHIM]Chemical Sciences, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [CHIM.ORGA] Chemical Sciences/Organic chemistry, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

18. Experimental Characterization of a Circularly-Polarized 1-Bit Unit-Cell for Beam Steerable Transmitarrays at Ka-Band

Author

Laurent Dussopt, Philippe Pouliguen, Luca Di Palma, Ronan Sauleau, Patrick Potier, Antonio Clemente, Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), DGA Maîtrise de l'information (DGA.MI), Direction générale de l'Armement (DGA), Direction générale de l'armement [Bagneux] (DGA), Direction Générale de l’Armement (DGA/DS/MRIS), France, Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Patch antenna, discrete lens, business.industry, 020208 electrical & electronic engineering, Bandwidth (signal processing), 020206 networking & telecommunications, 02 engineering and technology, Orthomode transducer, Ka-band, [SPI]Engineering Sciences [physics], Optics, Transducer, Index Terms-Waveguide simulator, array lens, circular polarization, 0202 electrical engineering, electronic engineering, information engineering, Insertion loss, transmitarray antenna, Ka band, Electrical and Electronic Engineering, business, Circular polarization, Diode
Abstract

International audience; We propose here an experimental characterization procedure applied to a 1-bit reconfigurable transmitarray unit-cell working in circular polarization at Ka-band. The transmission phase of the unit-cell is controlled on the receiving side by switching two p-i-n diodes integrated on the radiating element. The circular polarization is generated on the transmitting side with a truncated corner patch antenna. A specific waveguide characterization setup and related procedure have been developed to extract the unit-cell S-matrix. The proposed setup includes non-standard waveguide sections, ad-hoc transitions and an Ortho-Mode Transducer (OMT). The experimental results demonstrate a good agreement with full-wave simulations with a discrepancy of less than 0.1 dB on the measured minimum insertion loss of 1.65 dB at 29 GHz. A 3-dB bandwidth larger than 12% has been measured.

Published
2019

19. Mise en œuvre d’un dispositif expérimental de caractérisation d’antennes HF, par drone, en environnement d’utilisation

Author

HERBETTE, Quentin, Bourey, Nicolas, Urbani, Bruno, Menelle, Michel, Darces, Muriel, Hélier, Marc, Saillant, Stéphane, Auffray, Gilbert, Bacquenois, Dominique, Proust, Bruno, Gomez, Pascal, DEMR, ONERA, Université Paris Saclay [Palaiseau], ONERA-Université Paris-Saclay, Laboratoire Génie électrique et électronique de Paris (GeePs), CentraleSupélec-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), and Tonna Electronique

Subjects
[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, [SPI.ELEC] Engineering Sciences [physics]/Electromagnetism, ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
2019

20. Lograr la rectificacion del corriente electrica gracias a derivados de triazolferroceno

Author

Damien Brunel, David Duche, Clément Reynaud, Esteban SANCHEZ-ADAIME, Vikas Jangid, Chrystelle Lebouin, Jean-Jacques Simon, Rose Sauvage, Ludovic Escoubas, Didier Gigmes, Frederic Dumur, BRUNEL, Damien, Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Matériaux divisés, interfaces, réactivité, électrochimie (MADIREL), Direction générale de l'armement [Bagneux] (DGA), and Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, SAM, [CHIM.ORGA]Chemical Sciences/Organic chemistry, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, click chemistry, [CHIM] Chemical Sciences, ferrocene, [CHIM]Chemical Sciences, [CHIM.MATE]Chemical Sciences/Material chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, rectification, [CHIM.ORGA] Chemical Sciences/Organic chemistry
Abstract

International audience; Rectenna solar cells are electronic devices which were described for the first time in the 70s and these devices allow transforming light into electricity, thanks to the association of a nano-antenna and a rectifying element. Due to the size of the device and the challenge of rectification of the terahertz frequencies, the realization of such devices remains difficult. Rectification of current by molecules is a really active research field due to the possibility to drastically reduce the size of electronic devices. Theorized by Aviram and Ratner, the rectification can be achieved by an asymmetric molecule, enabling the electrons to be transferred in a preferential direction through the compound. The state of the art of the organic molecular rectifiers shows rectification ratios up to 10 5. Such ratios were obtained with molecules composed of a ferrocene unit, which is the key for the rectification process, linked to an insulating alkyl chain. At present, only few studies have been devoted to control the orientation of the molecular rectifiers. More precisely, the possibility to anchor onto two different electrodes while controlling their orientation has only been scarcely investigated. In our case, such a control of the molecular orientation has been obtained by developing a two-step process based on Click Chemistry. Here, we present unprecedented works on the synthesis of new ferrocene derivatives designed as molecular rectifiers. Especially, a special effort is devoted: firstly, to allow the molecule to be covalently linked to two metal electrodes (allowing implementation into future device) and secondly to definitely control the orientation of the molecular rectifier relative to both electrodes thanks to Click Chemistry. Here, we present unprecedented works on the synthesis of new ferrocene derivatives designed as molecular rectifiers. Especially, a special effort is devoted: firstly, to allow the molecule to be covalently linked to two metal electrodes (allowing implementation into future device) and secondly to definitely control the orientation of the molecular rectifier relative to both electrodes thanks to Click Chemistry

Published
2019

21. Total Ionizing Dose Effect in LDMOS oxides and devices

Author

Antoine Touboul, T. Borel, A. Michez, J. Boch, Salvatore Danzeca, B. Azais, E. Leduc, S. Furic, Laurent Dusseau, Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Radiations et composants (RADIAC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), European Organization for Nuclear Research (CERN), Centre Spatial Universitaire de Montpellier-Nîmes (CSU), Université de Montpellier (UM), Epicentre [Paris] [Médecins Sans Frontières], Atmel Corporation (ATMEL), and ATMEL

Subjects
010302 applied physics, LDMOS, Nuclear and High Energy Physics, Materials science, 010308 nuclear & particles physics, business.industry, Transistor, Gamma ray, Insulator (electricity), Integrated circuit, 01 natural sciences, law.invention, [SPI.TRON]Engineering Sciences [physics]/Electronics, Nuclear Energy and Engineering, law, Absorbed dose, Logic gate, 0103 physical sciences, Optoelectronics, Irradiation, Electrical and Electronic Engineering, business, ComputingMilieux_MISCELLANEOUS
Abstract

Laterally diffused metal–oxide–semiconductors transistors PD-silicon on insulator 150-nm mixed technology from Microchip are irradiated with 60Co gamma rays. Those irradiations have revealed a high sensitivity of the LDnMOS and LDpMOS pointing out that the main sensitive parameter is the ON-resistance. In this paper, degradation mechanisms at play are investigated through TCAD simulation, and an explanation of the physical mechanisms for the observed degradation is proposed.

Published
2019

22. Laser sintering of cold-pressed Cu powder without binder use

Author

Loic Constantin, Bruno Mortaigne, Clio Azina, Lisha Fan, Qiming Zou, Jean-François Silvain, Kamran Keramatnejad, Yongfeng Lu, Department of Electrical and Computer Engineering, University of Nebraska [Lincoln], University of Nebraska System-University of Nebraska System, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), University of Nebraska System, DGA/Mission pour la Recherche et l'Innovation Scientifique (DGA/MRIS), and Direction générale de l'Armement (DGA)

Subjects
0209 industrial biotechnology, Microstructural evolution, Materials science, Cold pressing, Sintering, chemistry.chemical_element, Copper powder, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Copper, law.invention, Laser sintering (LS), Atomic diffusion, Selective laser sintering, 020901 industrial engineering & automation, chemistry, law, Powder metallurgy, Densification, Surface roughness, Relative density, General Materials Science, Composite material, 0210 nano-technology
Abstract

International audience; In this work, laser sintering (LS) of cold-pressed copper (Cu) powder without using a binder was demonstrated. To promote the densification of the final part, the Cu powder was cold pressed beforehand, thereby forming a densely packed powder bed for the LS. The densification and microstructural evolution study show that the cold-pressed powder led to an increase of up to 11% in the relative density and a decrease of 10 times in the surface roughness. The influence of the scan speed on the densification and sintering quality was studied. A relatively slow scan speed, 25 µm/s, allowed sufficient atomic diffusion during the LS process and ultimately produced dense Cu parts without cracks and open pores. The introduction of the cold-pressing step into the LS process is critical for achieving high-density powder metallurgy parts without using binders.

Published
2018

23. SEVERITE D'UN NIVEAU D'ESSAI DANS UNE DEMARCHE DE GARANTIE EXPERIMENTALE

Author

Banvillet, A, Lelan, P, Colin, B., Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Direction générale de l'armement [Bagneux] (DGA), NEXTER Systems, and ALJARF, ALI

Subjects
[PHYS]Physics [physics], [SPI]Engineering Sciences [physics], [SPI] Engineering Sciences [physics], [MATH] Mathematics [math], [MATH]Mathematics [math], ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract

International audience

Published
2018

24. An Evaluation Tool for Physical Attacks

Author

Yanis Linge, Bruno Robisson, Gaël Thomas, Hélène Le Bouder, Assia Tria, Ronan Lashermes, Département Systèmes Réseaux, Cybersécurité et Droit du numérique (IMT Atlantique - SRCD), IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut Mines-Télécom [Paris] (IMT), Objets communicants pour l'Internet du futur (OCIF), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES (IRISA-D2), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique (Inria), STMicroelectronics [Rousset] (ST-ROUSSET), DPACA [Gardanne], CEA Tech en région Sud (DSUD), CEA Tech en régions (CEA-TECH-Reg), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CEA Tech en régions (CEA-TECH-Reg), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Université de Bretagne Sud (UBS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-CentraleSupélec-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Bretagne Sud (UBS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UNIV-RENNES)-CentraleSupélec, and CEA Tech PACA

Subjects
021110 strategic, defence & security studies, business.industry, Computer science, 0211 other engineering and technologies, ComputerApplications_COMPUTERSINOTHERSYSTEMS, 02 engineering and technology, Computer security, computer.software_genre, [INFO.INFO-CR]Computer Science [cs]/Cryptography and Security [cs.CR], Work (electrical), Path (graph theory), 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Internet of Things, business, computer
Abstract

International audience; The security issues of devices, used in the Internet of Things (IoT) for example, can be considered in two contexts. On the one hand, these algorithms can be proven secure mathematically. On the other hand, physical attacks can weaken the implementation. In this work, we want to compare these attacks between them. A tool to evaluate and compare different physical attacks, by separating the theoretical attack path and the experimental parts of the attacks, is presented.

Published
2018

25. Gate Grounded n-MOS Sensibility to Ionizing Dose

Author

Antoine Touboul, Laurent Dusseau, Jerome Boch, Salvatore Danzeca, E. Leduc, A. Michez, S. Furic, B. Azais, T. Borel, Epicentre [Paris] [Médecins Sans Frontières], Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Atmel Corporation (ATMEL), ATMEL, Radiations et composants (RADIAC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), European Organization for Nuclear Research (CERN), Centre Spatial Universitaire de Montpellier-Nîmes (CSU), and Université de Montpellier (UM)

Subjects
Materials science, Structure analysis, business.industry, Critical event, Integrated circuit, [SPI.TRON]Engineering Sciences [physics]/Electronics, law.invention, law, Logic gate, Optoelectronics, ggNMOS, business, Lead (electronics), ComputingMilieux_MISCELLANEOUS, Degradation (telecommunications)
Abstract

ESD (electrostatic discharges) is one of the most critical event leading most of the time to the destruction of integrated circuits. Nowadays, most of the integrated circuits are design with inbuilt ESD protections structures that have to be electrically neutral. TID degradation on Gate Grounded nMOSFETs is investigated in this paper. Degradation hypothesis and structure analysis performed on GGnMOS from Microchip have highlighted some possible failure that can lead to an inability to protect properly an integrated circuit, or to an increase of the leakage current of those structure.

Published
2018

26. 3D direction-of-arrival estimation using a wideband vector antenna

Author

Hervé Aubert, Christopher Djoma, Philippe Pouliguen, Patrick Potier, Christophe Morlaas, Johan Duplouy, Ecole Nationale de l'Aviation Civile (ENAC), Équipe MIcro et Nanosystèmes pour les Communications sans fil (LAAS-MINC), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, DGA Maîtrise de l'information (DGA.MI), Direction générale de l'Armement (DGA), DGA Mission Recherche et Innovation Scientifique (DGA MRIS), DGA, Direction générale de l'armement [Bagneux] (DGA), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)

Subjects
Electromagnetic field, Computer science, Accurate estimation, Direction finding, Acoustics, Direction of arrival, 020206 networking & telecommunications, 02 engineering and technology, 0202 electrical engineering, electronic engineering, information engineering, Range (statistics), Antenna (radio), Wideband, Broadband antennas, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Computer Science::Information Theory
Abstract

International audience; In this communication, direction finding performances of a reconfigurable wideband vector antenna are predicted. The accurate estimation of the direction of arrivals across the 3D half-space of incoming electromagnetic fields is obtained over a 1.7:1 frequency range from only two colocated and orthogonal circular arrays of Vivaldi antennas.

Published
2018

27. Localization with data association

Author

Desrochers, Benoît, Jaulin, Luc, Kumkov, Sergey, Direction générale de l'armement [Bagneux] (DGA), Lab-STICC_ENSTAB_CID_PRASYS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL), D.I.Mendeleyev Institute for Metrology (Russia), COOMET, École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), and Institut Mines-Télécom [Paris] (IMT)

Subjects
[MATH.MATH-ST]Mathematics [math]/Statistics [math.ST], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

28. Thermal Decomposition of Phosgene and Diphosgene

Author

Baptiste Sirjean, J.-C. Lizardo-Huerta, L. Verdier, René Fournet, Pierre-Alexandre Glaude, Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), and Direction générale de l'armement [Bagneux] (DGA)

Subjects
Pericyclic reaction, 010304 chemical physics, Thermal decomposition, 010402 general chemistry, Combustion, 01 natural sciences, 7. Clean energy, Decomposition, 0104 chemical sciences, Reaction rate, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry.chemical_compound, [CHIM.GENI]Chemical Sciences/Chemical engineering, chemistry, 13. Climate action, Computational chemistry, 0103 physical sciences, Diphosgene, Physical and Theoretical Chemistry, Phosgene, Pyrolysis
Abstract

International audience; Phosgene (COCl2) is a toxic compound used or formed in a wide range of applications. The understanding of its thermal decomposition for destruction processes or in the event of accidental fire of stored reserves is a major safety issue. In this study, a detailed chemical kinetic model for the thermal decomposition and combustion of phosgene and diphosgene is proposed for the first time. A large number of thermo-kinetic parameters were calculated using quantum chemistry and reaction rate theory. The model was validated against experimental pyrolysis data from the literature. It is predicted that the degradation of diphosgene is mainly ruled by a pericyclic reaction producing two molecules of phosgene, and, to a lesser extent, by a roaming radical reaction yielding CO2 and CCl4. Phosgene is much more stable than diphosgene under high-temperature conditions and its decomposition starts at higher temperatures. Decomposition products are CO and Cl2. An equimolar mixture of these latter can be considered as a surrogate of phosgene from the kinetic point of view, but the important endothermic effect of the decomposition reaction can lead to different behaviors, for instance in case of auto-ignition under high pressure and high temperature.

Published
2018

29. The Role of Feedback Resistors and TID Effects in the ASET Response of a High Speed Current Feedback Amplifier

Author

A. Privat, Jerome Boch, Frédéric Saigné, Jean-Roch Vaillé, R. Marec, Laurent Dusseau, Francoise Bezerra, B. Azais, Nicolas Roche, G. Auriel, Fabien Roig, P. Ribeiro, Robert Ecoffet, P. Calvel, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Radiations et composants (RADIAC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre Spatial Universitaire de Montpellier-Nîmes (CSU), Université de Montpellier (UM), Direction des Applications Militaires (DAM), Naval Research Laboratory (NRL), The George Washington University (GW), Thales Alenia Space (TAS), THALES, Centre National d'Études Spatiales [Toulouse] (CNES), Direction générale de l'armement [Bagneux] (DGA), GRAMAT (DAM/GRAMAT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Thales Alenia Space - TAS (Toulouse, France), Thales (France), Thales Alenia Space [Toulouse] (TAS), THALES [France], and Eric, Dauverchain

Subjects
Nuclear and High Energy Physics, Engineering, Current-feedback operational amplifier, business.industry, Amplifier, Bipolar junction transistor, Bandwidth (signal processing), Electrical engineering, Integrated circuit, [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, law.invention, Computer Science::Emerging Technologies, Nuclear Energy and Engineering, Single effect, law, Electronic engineering, Transient response, Electrical and Electronic Engineering, Resistor, business, ComputingMilieux_MISCELLANEOUS
Abstract

The influence of external circuit designs on ASET shapes in a high speed current feedback amplifier (CFA) (AD844) is investigated by means of the pulsed laser single event effect (PLSEE) simulation technique. Changes of the feedback resistors modify circuit’s electrical parameters such as closed-loop gain and bandwidth, affecting amplifier stability and so ASET shapes. Qualitative explanations based on general electronic rules and feedback theories enable the understanding of a CFA operation establishing a correlation between the evolution of external feedback resistor values and ASET parameters. TID effects on the ASET sensitivity in AD844 CFA are also investigated in this work highlighting different behaviors according to the impacted bipolar transistor in the integrated circuit.

Published
2014

30. Atypical Effect of Displacement Damage on LM124 Bipolar Integrated Circuits

Author

B. Azais, Fabien Roig, Salvatore Danzeca, Laurent Dusseau, A. Michez, Nicolas J.-H. Roche, Francoise Bezerra, T. Borel, P. Calvel, Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre Spatial Universitaire de Montpellier-Nîmes (CSU), Université de Montpellier (UM), Centre National d'Études Spatiales [Toulouse] (CNES), Radiations et composants (RADIAC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Epicentre [Paris] [Médecins Sans Frontières], NUCLETUDES, Airbus Safran Launchers, Direction générale de l'armement [Bagneux] (DGA), European Organization for Nuclear Research (CERN), Thales Alenia Space - TAS (Toulouse, France), and Thales (France)

Subjects
Nuclear and High Energy Physics, Materials science, 02 engineering and technology, Integrated circuit, 01 natural sciences, law.invention, [SPI]Engineering Sciences [physics], law, 0103 physical sciences, Irradiation, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Electrical and Electronic Engineering, Open-loop gain, 010308 nuclear & particles physics, business.industry, Transistor, Biasing, 021001 nanoscience & nanotechnology, equipment and supplies, [SPI.TRON]Engineering Sciences [physics]/Electronics, Capacitor, Nuclear Energy and Engineering, Absorbed dose, Operational amplifier, Optoelectronics, 0210 nano-technology, business
Abstract

International audience; LM124 operational amplifiers from three different manufacturers are irradiated with 60Co gamma rays and neutrons. During neutrons irradiation, one of the three integrated circuits exhibits an unexpected slew rates increase while its open loop gain and supply bias current follow the usual monotonic decrease as described in the literature. Analysis at circuit level shows that this phenomenon is due to an increase in the radiation-induced base current of the transistor used as buffer stage in the amplification chain. It is then demonstrated that a slight modification of the buffer transistor design, which is not implemented on the two other devices, enhances this phenomenon. Finally, the impact of the buffer transistor design on displacement damage and total ionizing dose response is investigated.

Published
2017

31. Numerical simulations of acoustic imaging in hydrodynamic tunnel with model adaptation and boundary layer noise reduction

Author

Amailland, Sylvain, Thomas, Jean-Hugh, Pezerat, Charles, Boucheron, Romuald, Pascal, Jean-Claude, Pézerat, Charles, Laboratoire d'Acoustique de l'Université du Mans (LAUM), Centre National de la Recherche Scientifique (CNRS)-Le Mans Université (UM), and Direction générale de l'armement [Bagneux] (DGA)

Subjects
[PHYS.MECA.VIBR]Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph], [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [PHYS.MECA.VIBR] Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.MECA.MEFL] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], ComputingMilieux_MISCELLANEOUS, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

International audience

Published
2017

32. Approach maneuvers for autonomous landing using visual servo control

Author

Christian Barat, Julien Thadasack, Tarek Hamel, Robert Mahony, Florent Le Bras, Direction générale de l'armement [Bagneux] (DGA), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe SYSTEMES, Signal, Images et Systèmes (Laboratoire I3S - SIS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Australian National University - Department of engineering (ANU), and Australian National University (ANU)

Subjects
Engineering, business.product_category, business.industry, Servo control, Aerospace Engineering, Touchdown, [SPI.AUTO]Engineering Sciences [physics]/Automatic, Airplane, Nonlinear system, Noise, Control theory, Point (geometry), Runway, Electrical and Electronic Engineering, Descent (aeronautics), business, ComputingMilieux_MISCELLANEOUS, Simulation
Abstract

A nonlinear image-based visual servo control algorithm for autonomous landing of a fixed wing aircraft is described. The primary sensor system is a vision sensor yielding a sequence of images from which 2D linear and point features of the runway are extracted. The first two phases of a landing maneuver, alignment to the runway and glide (descent to the runway) are treated in the work presented here. The final landing maneuvers, flare to touchdown, and taxiing require additional sensor modalities and are not treated. The proposed control scheme deals with unknown wind conditions and incorporates the full nonlinear dynamics of the airplane. Simulation results based on realistic environmental conditions and measurement noise are presented that validate the control design approach.

Published
2014

33. Reduced kinetics model for X-ray-generated atmospheric air plasmas fitted by microwave transmission measurements

Author

Tristan Gouriou, Olivier Eichwald, Mohammed Yousfi, M. Ribière, B. Azais, LAboratoire PLasma et Conversion d'Energie (LAPLACE), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), and Direction générale de l'armement [Bagneux] (DGA)

Subjects
[PHYS]Physics [physics], 010302 applied physics, Materials science, Atmospheric pressure, Plasma parameters, [SPI.PLASMA]Engineering Sciences [physics]/Plasmas, General Physics and Astronomy, 02 engineering and technology, Electron, Plasma, 021001 nanoscience & nanotechnology, 01 natural sciences, Ion, [SPI]Engineering Sciences [physics], Ionization, 0103 physical sciences, [CHIM]Chemical Sciences, Plasma diagnostics, Atomic physics, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Microwave
Abstract

We elaborate a reduced kinetics model to study humid air plasmas at atmospheric pressure generated by X-ray irradiation. The originality of the present approach is to use the experimental results of the transmission measurements, in the case of a microwave signal by the X-ray-induced plasma filled waveguide, to fit the calculated time evolutions of some plasma parameters such as average electron energies and an effective loss coefficient. The reduced kinetics model used to restitute the transmission measurements is based on the solution of a one-dimensional transport of a guided microwave signal coupled to the calculation of the complex electric conductivity of the plasma. The conductivity is calculated using a simplified kinetics scheme based on three species (electrons, positive ions, and negative ions) and coupled to the electron energy balance equation. The input parameters of the model are the collision cross sections of the electrons impact with air molecules (N2, O2, and H2O) and the electron energy distribution functions pre-tabulated for a large set of average electron energies. The latter takes into account the main processes leading to the decrease of average electron energies. This model is more generally usable for the modelling of weakly ionized atmospheric air plasmas during, for instance, the streamer development in corona or dielectric barrier discharges.We elaborate a reduced kinetics model to study humid air plasmas at atmospheric pressure generated by X-ray irradiation. The originality of the present approach is to use the experimental results of the transmission measurements, in the case of a microwave signal by the X-ray-induced plasma filled waveguide, to fit the calculated time evolutions of some plasma parameters such as average electron energies and an effective loss coefficient. The reduced kinetics model used to restitute the transmission measurements is based on the solution of a one-dimensional transport of a guided microwave signal coupled to the calculation of the complex electric conductivity of the plasma. The conductivity is calculated using a simplified kinetics scheme based on three species (electrons, positive ions, and negative ions) and coupled to the electron energy balance equation. The input parameters of the model are the collision cross sections of the electrons impact with air molecules (N2, O2, and H2O) and the electron energ...

Published
2019

34. Correlation of Dynamic Parameter Modification and ASET Sensitivity in a Shunt Voltage Reference

Author

G. Auriel, B. Azais, J. H. Warner, Dale McMorrow, N. J-H Roche, Laurent Dusseau, Jerome Boch, Frédéric Saigné, K. Kruckmeyer, S. P. Buchner, Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Radiations et composants (RADIAC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Naval Research Laboratory (NRL), Centre Spatial Universitaire de Montpellier-Nîmes (CSU), Université de Montpellier (UM), Texas Instrument, Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Direction générale de l'armement [Bagneux] (DGA)

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Time constant, Pulse duration, Natural frequency, 01 natural sciences, [SPI.TRON]Engineering Sciences [physics]/Electronics, Step response, Nuclear Energy and Engineering, Control theory, 0103 physical sciences, Transient response, Electrical and Electronic Engineering, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Shunt (electrical), Voltage reference, Voltage
Abstract

Analog Single Event Transients (ASETs) in two different shunt voltage references used in power management systems are investigated. Little has been published regarding how the dynamic parameter changes induced by external circuit design, such as time constant, damping coefficient or natural frequency affect ASET shapes. Modifications of the dynamic parameters of the circuit are measured by step response measurement. A correlation between dynamic parameters and ASET laser testing results is proposed. This study establishes the correlation between the dynamic parameters of a shunt voltage reference and ASET parameters such as pulse duration, and positive and negative amplitude.

Published
2012

35. Tests basés sur Modèles pour systèmes interactifs musicaux

Author

Poncelet Sanchez, Clément, Représentations musicales (Repmus), Sciences et Technologies de la Musique et du Son (STMS), Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), EDITE, Florent Jacquemard, and Poncelet Sanchez, Clément

Subjects
[INFO.INFO-OH] Computer Science [cs]/Other [cs.OH], Systèmes musicaux interactifs, Construction de modèle automatique, Conformité temporelle, Model-Based Testing, Interactif Music Systems, Antescofo, automatic model construction, [INFO.INFO-OH]Computer Science [cs]/Other [cs.OH], Tests basés sur modèles, Tests différés et temps réel, timed conformance
Abstract

Can real-time interactive systems be automatically timed tested ?This work proposes an answer to this question by providing a formal model based testing framework for Interactive Music Systems IMS.During performance, IMSs must react in real-time to audio signals from musicians according to the timed requirements of a score. Such goals imply strong needs of temporal reliability and robustness to unforeseen errors in input.Be able to formally check this robustness before execution is a problem insufficiently addressed by the computer music community. We present, in this document, the concrete application of a Model-Based Testing (MBT) framework to a state-of-the-art IMS.The framework was defined on purpose of testing real-time interactive systems in general.We formally define the model in which our method is based. This model is automatically constructed from the high-level requirements and can be translated into a network of time automata. The mixed music environment implies the management of a multi-timed context and the generation of musically relevant input data through the testing framework.Therefore, this framework is both time-based, permitting durations related to different time units, andevent-driven, following the musician events given in input. Multiple options are provided by our framework, as two approaches, offline and online, to assess the system timed conformance fully automatically, from the requirement to the verdict.We performed experiments on a real-case study: the score follower Antescofo. The application of our fully automatic frameworkto real mixed scores used in concerts have permitted to identify bugs in the target IMS., Est-il possible de tester automatiquement le comportement temporisé des systèmes interactifs temps réel ?Ces travaux proposent une solution en fournissant un ensemble d'outils de test basé sur modèles pour Systèmes Musicaux Interactifs (SMI).Pendant une performance, les SMIs doivent réagir en temps réel aux signaux audio venant des musiciens tout en suivant les contraintes temporelles d'une partition. Ceci demande au système une forte fiabilité temporelle et une robustesse face aux erreurs pouvant arriver en entrée du système.Hors, la vérification formelle de propriétés est insuffisamment traitée par la communauté de l'informatique musicale.Nous présentons dans cette thèse, la réalisation d'un ensemble d'outils de test basé sur modèles appliqué à un SMI.Il est à noter que ces outils de test ont été définis formellement dans le but de tester plus généralementle comportement temporel des systèmes interactifs temps réelprenant en compte des évènements discrets et des durées définissables sur des échelles multiples.Nous définissons notre modèle, créé pour spécifier les aspects évènementiel («event-triggerred») et temporel («timed-driven») des SMIs. Ce modèle a la particularité d'être automatiquement construit depuis les contraintes temporelles définies dans un document haut-niveau et peut être traduit vers un réseau d'automates temporisés.Nos outils ont été implantés avec la possibilité de tester automatiquement, selon une approche différée ou temps réel, la conformité temporelle du SMI.Un cas d'étude a permit d'appliquer notre ensemble d'outils de test sur un SMI d'actualité Antescofo avec succès, identifiant des bogues parfois non triviaux dans ce système.

Published
2016

36. Tests basés sur Modèles pour systèmes interactifs musicaux

Author

Poncelet Sanchez, Clément, Représentations musicales (Repmus), Sciences et Technologies de la Musique et du Son (STMS), Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche et Coordination Acoustique/Musique (IRCAM)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), EDITE, and Florent Jacquemard

Subjects
Systèmes musicaux interactifs, Construction de modèle automatique, Conformité temporelle, Model-Based Testing, Interactif Music Systems, Antescofo, automatic model construction, [INFO.INFO-OH]Computer Science [cs]/Other [cs.OH], Tests basés sur modèles, Tests différés et temps réel, timed conformance
Abstract

Can real-time interactive systems be automatically timed tested ?This work proposes an answer to this question by providing a formal model based testing framework for Interactive Music Systems IMS.During performance, IMSs must react in real-time to audio signals from musicians according to the timed requirements of a score. Such goals imply strong needs of temporal reliability and robustness to unforeseen errors in input.Be able to formally check this robustness before execution is a problem insufficiently addressed by the computer music community. We present, in this document, the concrete application of a Model-Based Testing (MBT) framework to a state-of-the-art IMS.The framework was defined on purpose of testing real-time interactive systems in general.We formally define the model in which our method is based. This model is automatically constructed from the high-level requirements and can be translated into a network of time automata. The mixed music environment implies the management of a multi-timed context and the generation of musically relevant input data through the testing framework.Therefore, this framework is both time-based, permitting durations related to different time units, andevent-driven, following the musician events given in input. Multiple options are provided by our framework, as two approaches, offline and online, to assess the system timed conformance fully automatically, from the requirement to the verdict.We performed experiments on a real-case study: the score follower Antescofo. The application of our fully automatic frameworkto real mixed scores used in concerts have permitted to identify bugs in the target IMS.; Est-il possible de tester automatiquement le comportement temporisé des systèmes interactifs temps réel ?Ces travaux proposent une solution en fournissant un ensemble d'outils de test basé sur modèles pour Systèmes Musicaux Interactifs (SMI).Pendant une performance, les SMIs doivent réagir en temps réel aux signaux audio venant des musiciens tout en suivant les contraintes temporelles d'une partition. Ceci demande au système une forte fiabilité temporelle et une robustesse face aux erreurs pouvant arriver en entrée du système.Hors, la vérification formelle de propriétés est insuffisamment traitée par la communauté de l'informatique musicale.Nous présentons dans cette thèse, la réalisation d'un ensemble d'outils de test basé sur modèles appliqué à un SMI.Il est à noter que ces outils de test ont été définis formellement dans le but de tester plus généralementle comportement temporel des systèmes interactifs temps réelprenant en compte des évènements discrets et des durées définissables sur des échelles multiples.Nous définissons notre modèle, créé pour spécifier les aspects évènementiel («event-triggerred») et temporel («timed-driven») des SMIs. Ce modèle a la particularité d'être automatiquement construit depuis les contraintes temporelles définies dans un document haut-niveau et peut être traduit vers un réseau d'automates temporisés.Nos outils ont été implantés avec la possibilité de tester automatiquement, selon une approche différée ou temps réel, la conformité temporelle du SMI.Un cas d'étude a permit d'appliquer notre ensemble d'outils de test sur un SMI d'actualité Antescofo avec succès, identifiant des bogues parfois non triviaux dans ce système.

Published
2016

37. SYNCHRONISATION DES MODELES D'ARCHITECTURE ET D'ANALYSE DE RISQUES : QUEL GAIN, COMMENT ET POURQUOI ?

Author

Legendre, Anthony, Lanusse, Agnès, Rauzy, Antoine, Direction générale de l'armement [Bagneux] (DGA), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Génie Industriel - EA 2606 (LGI), CentraleSupélec, Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU), Cofinancement CEA et DGA, Imdr, and Laboratoire d'Intégration des Systèmes et des Technologies (LIST)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], [INFO.INFO-CC]Computer Science [cs]/Computational Complexity [cs.CC], [INFO.INFO-PF]Computer Science [cs]/Performance [cs.PF], [INFO.INFO-FL]Computer Science [cs]/Formal Languages and Automata Theory [cs.FL], [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM], [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation
Abstract

National audience; We observed a need for collaborative means between professional expertise early in the process, especially between the system architecture design and RAMS1 assessments. In this paper, we introduce concepts and conceptual tools to improve the consistency between models and allow refinement of the models used. Our approach will be illustrated on a system on board a fighting helicopter.; Nous avons observé un besoin de moyens collaboratifs entre les expertises métiers au plus tôt dans les processus, notamment entre la conception d'architectures système et les évaluations de la sûreté de fonctionnement. Dans cet article, nous introduisons des concepts et des outils conceptuels qui visent à améliorer la cohérence entre les modèles et permettent un raffinement des modèles utilisés. Notre approche est illustrée ici sur un système embarqué dans un hélicoptère de combat.

Published
2016

38. Directions towards supporting synergies between Design and Probabilistic Safety Assessment Activities: illustration on a Fire detection system embedded in a helicopter

Author

Legendre, Anthony, Lanusse, Agnès, Rauzy, Antoine, Direction générale de l'armement [Bagneux] (DGA), Laboratoire Génie Industriel - EA 2606 (LGI), CentraleSupélec, Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU), Cofinancement CEA et DGA, Korean Nuclear Society, and Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA))

Subjects
[INFO.INFO-CC]Computer Science [cs]/Computational Complexity [cs.CC], [INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], [INFO.INFO-PF]Computer Science [cs]/Performance [cs.PF], [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation
Abstract

International audience; The complexity of modern critical systems is growing rapidly while the industry is submitted to more and more pressure for reducing costs and time-to-market. Traditional development methods " in disciplinary silos " used to design and analyze such complex systems are reaching their limits. RAMS engineers face more and more difficulties to satisfy demands of reliability evaluation especially at early stages of system design. In this context we offer to take advantage of Model-Driven Engineering (MDE) approaches to reduce construction time of reliability models and improve their consistency with system models. Model-Driven Engineering is a promising approach used to develop and analyze complex systems from different domains. In this paper, we exploit MDE to support PSA analysis and illustrate the approach on a case study from avionics industry. This experimentation has enabled the suggestion of a seamless methodology to support iterative Probabilistic Safety Analysis, thus improving the cooperation with system designers.

Published
2016

39. Model synchronisation between architecture system and risk analysis: which gain, how and why?

Author

A. Rauzy, A. Lanusse, A. Legendre, Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Département Ingénierie Logiciels et Systèmes (DILS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Department of Engineering Cybernetics [Trondheim] (ITK NTNU), Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Laboratoire d'Intégration des Systèmes et des Technologies ( LIST ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Département Ingénierie Logiciels et Systèmes ( DILS ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Department of Engineering Cybernetics [Trondheim] ( NTNU ), Norwegian University of Science and Technology [Trondheim] ( NTNU ), Direction générale de l'armement [Bagneux] (DGA), Laboratoire Génie Industriel - EA 2606 (LGI), CentraleSupélec, Norwegian University of Science and Technology (NTNU), Cofinancement CEA et DGA, and Imdr

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], [INFO.INFO-CC]Computer Science [cs]/Computational Complexity [cs.CC], 021103 operations research, [ INFO ] Computer Science [cs], Computer science, 0211 other engineering and technologies, 02 engineering and technology, [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM], [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, 01 natural sciences, [INFO.INFO-PF]Computer Science [cs]/Performance [cs.PF], [INFO.INFO-FL]Computer Science [cs]/Formal Languages and Automata Theory [cs.FL], 0103 physical sciences, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO]Computer Science [cs], 010301 acoustics
Abstract

International audience; We observed a need for collaborative means between professional expertise early in the process, especially between the system architecture design and RAMS 1 assessments. In this paper, we introduce concepts and conceptual tools to improve the consistency between models and allow refinement of the models used. Our approach will be illustrated on a system on board a fighting helicopter; Nous avons observé un besoin de moyens collaboratifs entre les expertises métiers au plus tôt dans les processus, notamment entre la conception d'architectures système et les évaluations de la sûreté de fonctionnement. Dans cet article, nous introduisons des concepts et des outils conceptuels qui visent à améliorer la cohérence entre les modèles et permettent un raffinement des modèles utilisés. Notre approche est illustrée ici sur un système embarqué dans un hélicoptère de combat.

Published
2016

40. Marine mammal range and depth estimation using non-separated multipath propagation

Author

Barazzutti, Amélie, Gervaise, Cedric, SEGER, Kerry D., Thode, Aaron, R., Jorge URBAN, Martınez-Loustalot, Pamela, Jimenez-Lopez, M. Esther, Lopez-Arzate, Diana, Mars, Jerome, DGA/IP/ASC/ENV, Direction générale de l'armement [Bagneux] (DGA), GIPSA - Signal Images Physique (GIPSA-SIGMAPHY), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Chaire CHORUS - Fondation Grenoble-INP, Institut Polytechnique de Grenoble - Grenoble Institute of Technology, Scripps Institution of Oceanography (SIO), University of California [San Diego] (UC San Diego), University of California-University of California, Universidad Autónoma de Baja California Sur (UABCS), and DGA

Subjects
[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; In passive acoustic monitoring, source localization using multipath propagation can be challenging whenever the source-receiver configuration leads to unresolved paths. Here, we propose a single-hydrophone method to estimate the range of a source based on two steps. First, we define a time deformation operator (e.g., Bonnel et al. 2014) to estimate the signal’s impulse response (IR). Each group of paths, when warped at its time of arrival, is transformed into a tone that corresponds to a peak in the IR, which can be isolated in the warped time-frequency domain, permitting a significant improvement of the time resolution of the multipath, or groups of multipath. Next, relative arrival times are used to estimate the source range and depth. When only groups of paths are resolved, the identity of the paths constituting the group remains unknown, preventing the use of classical localization methods. To overcome this critical limitation, we apply an approach based on the characterization of groups of paths to estimate source location. We evaluate the method’s performance on synthesized data, and examine its potential use on humpback whale low-frequency modulated calls using data collected off Cabo San Lucas in 2013.

Published
2016

41. Utilisation de warping temporel pour étendre le domaine de fonctionnement d’un procédé d’inversion géoacoustique passive

Author

Cedric Gervaise, Jerome Mars, Amélie Barazzutti, GIPSA - Signal Images Physique (GIPSA-SIGMAPHY), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), DGA/IP/ASC/ENV, Direction générale de l'armement [Bagneux] (DGA), Chaire CHORUS - Fondation Grenoble-INP, Institut Polytechnique de Grenoble - Grenoble Institute of Technology, and collaboration DGA

Subjects
oceanographic tomography, traitement du signal multidimensionnel, multidimensional signal processing, passive acoustics, tomographie océanique, warping, observation de l’environnement, inversion géoacoustique, geoacoustic inversion, [SDE]Environmental Sciences, acoustique passive, 14. Life underwater, Electrical and Electronic Engineering, environmental observation, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

National audience; This paper presents new tools to improve a geoacoustic inversion scheme relying on the inversion of marine mammals vocalizations recorded on a single hydrophone. This method makes best use of the multipath propagation and time-frequency signature of vocal calls. The classical signal processing tools based on spectrogram limit both the range of the scheme and the signals panel that can be processed. In this paper, we introduce new tools based on temporal warping that allow high resolution paths separation. Each echo has to be transformed into a pure frequency. Therefore, they are warped according to the frequency law of the signal estimated according to the first echo. The warping tools enable a high resolution of each echo in the time-frequency warped domain. Applying the warping on a moving window, one can estimate the impulsive response (IR) of the channel and deduce the source location, grazing angle and transmission losses. Then, as warping operators conserve energy, the path levels can be estimated using the time-frequency warped representation. Through the processing of several signals, we get a curve of an estimation of the reflection coefficient that feeds the inversion algorithm. The theory of this extended method is described and its performances are evaluated on a controlled real data set in the Gulf of Lion. The range and the recording duration have been improved (range from 300 to 900 meters and duration multiplied by 2.5). With the new scheme, we have access to a set of geoacoustic parameters allowing to better describe the bottom features.; Cet article introduit de nouveaux outils pour le traitement de signal dans le cadre d’un schéma d’inversion géoacoustique passive s’appuyant sur des modulations de fréquence de mammifères marins captés sur un unique hydrophone. La méthode se base sur l’utilisation de la propagation multitrajet pour extraire l’information nécessaire à l’estimation du coefficient de réflexion du sédiment superficiel. Jusqu’à présent, l’utilisation d’outils de traitement du signal basés sur le spectrogramme limitait la portée et les signaux candidats à l’inversion, ceux-ci devant présenter des échos résolus dans le plan temps-fréquence au regard des outils mis en œuvre. Ce papier propose l’ajout d’une nouvelle étape de traitement basée sur des opérateurs de déformation temporelle (warping) permettant la séparation haute résolution des échos. Les échos sont transformés en composantes de fréquences pures par application d’un opérateur de déformation avec pour loi de déformation, la loi de fréquence instantanée du signal. En contexte passif, cette loi est estimée à partir du premier écho reçu. L’application de l’opérateur de déformation sur une fenêtre temporelle glissante permet d’obtenir la réponse impulsionnelle (RI) du canal. Celle-ci est ensuite utilisée pour estimer la position de la source, l’angle de rasance et les pertes de transmission. Le warping conservant l’énergie, le niveau de chaque écho peut être alors estimé sur le signal déformé sans devoir revenir dans l’espace temporel initial. A l’instar de la méthode d’inversion de base, le traitement d’une série d’émissions fournit une courbe estimée du coefficient de réflexion en fonction des angles de rasance. Cette courbe sert d’observable à l’algorithme d’inversion. Le résultat important de cette étude est que ces nouveaux outils permettent d’augmenter la portée et la diversité des signaux candidats à la méthode d’inversion. Les performances et la validité du schéma d’inversion étendu ont été évaluées sur données synthétiques puis confrontées avec succès aux émissions réelles dans le golfe du Lion sur lesquelles la méthode d’origine avait été précédemment évaluée. La portée a été triplée et la durée d’enregistrement utile multipliée par un facteur 2,5 grâce aux nouveaux outils. Avec ces nouveaux outils, nous avons accès à un ensemble de paramètres géoacoustiques permettant de mieux décrire les caractéristiques du fond marin.

Published
2016

42. Moldable multispectral glasses in GeS2–Ga2S3–CsCl system transparent from the visible up to the thermal infrared regions

Author

Odile Merdrignac-Conanec, Antoine Bréhault, Philippe Adam, Thierry Pain, Xianghua Zhang, Bo Fan, Laurent Calvez, Michel Cathelinaud, Joël Rollin, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Direction générale de l'armement [Bagneux] (DGA), Thales Angénieux SA, THALES, This work has been supported by the French Direction Générale de l'Armement and the industrial partner THALES ANGENIEUX through the program ANR-12-ASTR-0016., ANR-12-ASTR-0016,OMVIR,Optiques Moulées multispectrales transparentes dans le Visible et dans l'InFrarouge thermique(2012), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and THALES [France]

Subjects
Materials science, Chalcogenide glasses, Multispectral, Multispectral image, 02 engineering and technology, Surface finish, Molding (process), engineering.material, Protective coating, 01 natural sciences, law.invention, Optics, Coating, law, 0103 physical sciences, Materials Chemistry, Crystallization, 010302 applied physics, Thermal infrared, business.industry, Visible transmission, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Transparency (projection), Ceramics and Composites, engineering, 0210 nano-technology, business
Abstract

This work is based on the development of glasses with extremely wide optical transmission range for multispectral imaging (visible + thermal imaging for example) with the same optical system. Glass compositions based on the GeS2–Ga2S3–CsCl system have been selected in order to obtain glasses transparent from the visible up to the 8–12 μm region. An increase of CsCl content can greatly improve the visible transmission of the glasses which however will be more sensitive to ambient moisture. Two glasses with different chromatic dispersion, necessary for the design of an optical system, are developed and characterized. Molding tests on aspheric surfaces demonstrate clearly the ability of these two glasses to be molded into complex optics without crystallization and with excellent roughness. In order to test the ability of an anti-reflective coating to protect these glasses against the atmospheric aggression, a ZnS coating has been applied to these glasses. An effective protection can be achieved with a ZnS coating of less than 1 μm of thickness. These results allow considering the use of compositions with higher CsCl content if still more transparency in the visible region is desired.

Published
2016

43. Experimental and numerical investigations of air plasmas induced by multi-MeV pulsed X-ray from low to atmospheric pressures

Author

Olivier Eichwald, C. Delbos, B. Azais, Mélissa Maulois, A. Garrigues, Romain Pouzalgues, Mohammed Yousfi, M. Ribière, LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Plasmas Réactifs Hors Equilibre (LAPLACE-PRHE), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Laboratoire de Génétique Cellulaire (LGC), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT), Science des Procédés Céramiques et de Traitements de Surface (SPCTS), Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Direction générale de l'armement [Bagneux] (DGA)

Subjects
Electron density, Atmospheric pressure, Chemistry, Time evolution, General Physics and Astronomy, Plasma, Electron, Plasma oscillation, 01 natural sciences, 010305 fluids & plasmas, [SPI]Engineering Sciences [physics], 0103 physical sciences, Plasma diagnostics, Atomic physics, 010306 general physics, Absorption (electromagnetic radiation)
Abstract

This research work is devoted to the experimental and theoretical analysis of air plasmas induced by multi-MeV pulsed X-ray for a large pressure range of humid air background gas varying from 20 mbar to atmospheric pressure. The time evolution of the electron density of the air plasma is determined by electromagnetic wave absorption measurements. The measurements have uncertainties of about ±30%, taking into account the precision of the dose measurement and also the shot to shot fluctuations of the generator. The experimental electron density is obtained by comparing the measurements of the transmitted microwave signals to the calculated ones. The calculations need the knowledge of the time evolution of the electron mean energy, which is determined by a chemical kinetic model based on a reaction scheme involving 39 species interacting following 265 reactions. During the X-ray pulse, a good agreement is obtained between time evolution of the electron density obtained from absorption measurements and calculations based on the kinetic model. The relative deviation on the maximum electron density and the corresponding plasma frequency is always lower than 10%. The maximum electron density varies from 4 × 1011 to 3.5 × 1013 cm−3 between 30 mbar to atmospheric pressure, while the peak of the electron mean energy decreases from 5.64 eV to 4.27 eV in the same pressure range.

Published
2016

44. Observer design for position and velocity bias estimation from a single direction output

Author

Claude Samson, Florent Le Bras, Tarek Hamel, Robert Mahony, Direction générale de l'armement [Bagneux] (DGA), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe SYSTEMES, Signal, Images et Systèmes (Laboratoire I3S - SIS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Australian National University - Department of engineering (ANU), Australian National University (ANU), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria), ANR-12-ASTR-0033,SCAR,Commande Référencée Capteurs de Robots Aériens(2012), ANR-10-EQPX-0044,ROBOTEX,Réseau national de plateformes robotiques d'excellence(2010), Université Nice Sophia Antipolis (... - 2019) (UNS), and COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS)

Subjects
0209 industrial biotechnology, Observer (quantum physics), Exponential convergence, Nonlinear observer, 02 engineering and technology, Systems and Control (eess.SY), [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, Position (vector), Control theory, Convergence (routing), 0202 electrical engineering, electronic engineering, information engineering, FOS: Electrical engineering, electronic engineering, information engineering, Computer Science - Systems and Control, 020201 artificial intelligence & image processing, Observability, Constant (mathematics), Velocity measurement, Mathematics
Abstract

This paper addresses the problem of estimating the position of an object moving in $R^n$ from direction and velocity measurements. After addressing observability issues associated with this problem, a nonlinear observer is designed so as to encompass the case where the measured velocity is corrupted by a constant bias. Global exponential convergence of the estimation error is proved under a condition of persistent excitation upon the direction measurements. Simulation results illustrate the performance of the observer., Comment: 6 pages, 6 figures

Published
2015

45. Output feedback observation and control for visual servoing of VTOL UAVs

Author

Tarek Hamel, Robert Mahony, Aurélie Treil, Florent Le Bras, Direction générale de l'armement [Bagneux] (DGA), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe SYSTEMES, Signal, Images et Systèmes (Laboratoire I3S - SIS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Australian National University - Department of engineering (ANU), Australian National University (ANU), ONERA - The French Aerospace Lab [Toulouse], and ONERA

Subjects
0209 industrial biotechnology, Engineering, General Chemical Engineering, Biomedical Engineering, Servo control, Rate gyro, Stability (learning theory), Aerospace Engineering, Video camera, 02 engineering and technology, Accelerometer, Visual servoing, 7. Clean energy, Industrial and Manufacturing Engineering, [SPI.AUTO]Engineering Sciences [physics]/Automatic, law.invention, 020901 industrial engineering & automation, law, Control theory, 11. Sustainability, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, ComputingMilieux_MISCELLANEOUS, business.industry, Mechanical Engineering, Suite, Control engineering, Control and Systems Engineering, Global Positioning System, 020201 artificial intelligence & image processing, business
Abstract

This paper considers the question of stabilizing vertical take-off and landing (VTOL) unmanned aerial vehicles (UAVs) using a minimal and an inexpensive sensor suite. The sensor suite considered consists of rate gyros and a single embedded video camera system. The approach taken is based on the principles of dynamic image-based visual servo control and extends the authors' earlier work by removing dependence on additional sensors, such as accelerometers and magnetometers. The technique presented has potential for mini-UAVs evolving in urban areas where global positioning system signals may not be available. The control algorithms and coupled state observers are presented in details. The main result of the paper is synthesized in a theorem along with a rigorous stability analysis of the closed-loop system. An estimate of the basin of attraction for the closed-loop system is provided. Simulation results are performed to illustrate the performance of the proposed control. Copyright © 2010 John Wiley & Sons, Ltd.

Published
2010

46. Development of a New Methodology to Model the Synergistic Effects Between TID and ASETs

Author

Jerome Boch, Francoise Bezerra, S. P. Buchner, L. Dusseau, B. Azais, Y G Velo, N. J-H Roche, P. Calvel, R. Marec, J.-R. Vaille, Frédéric Saigné, G. Auriel, Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Radiations et composants (RADIAC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), GRAMAT (DAM/GRAMAT), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Direction générale de l'armement [Bagneux] (DGA), Naval Research Laboratory (NRL), Thales Alenia Space (TAS), THALES, Thales Alenia Space - TAS (Toulouse, France), Thales (France), Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés (TIMA), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Techniques of Informatics and Microelectronics for integrated systems Architecture (TIMA), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Thales Alenia Space [Toulouse] (TAS), and THALES [France]

Subjects
Nuclear and High Energy Physics, Engineering, Materials science, 01 natural sciences, Bipolar circuits, law.invention, law, Control theory, High-level synthesis, 0103 physical sciences, Electronic engineering, Transient response, Electrical and Electronic Engineering, 010306 general physics, ComputingMilieux_MISCELLANEOUS, 010308 nuclear & particles physics, business.industry, Transistor, Supply current, [SPI.TRON]Engineering Sciences [physics]/Electronics, Nuclear Energy and Engineering, Absorbed dose, Operational amplifier, business, Network analysis, Degradation (telecommunications)
Abstract

A high level model is developed using circuit analysis to predict the synergy effect observed on a three stages operational amplifier. This model makes possible to explain and to predict the analog single event transients propagation in circuitry. The effect of total ionizing dose is taken into account by varying the model parameters using the monitoring of the usual supply current induced degradation of the operational amplifier.

Published
2010

47. Accelerated Irradiation Method to Study Synergy Effects in Bipolar Integrated Circuits

Author

R. Marec, Eric Lorfevre, Vincent Pouget, P. Calvel, B. Azais, Jerome Boch, S.P. Buchner, Nicolas J.-H. Roche, Jean-Roch Vaillé, Laurent Dusseau, Y G Velo, G. Auriel, J.-P. David, Frédéric Saigné, Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Radiations et composants (RADIAC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), GRAMAT (DAM/GRAMAT), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre National d'Études Spatiales [Toulouse] (CNES), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Naval Research Laboratory (NRL), Thales Alenia Space - TAS (Toulouse, France), Thales (France), Thales Alenia Space (TAS), THALES, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Thales Alenia Space [Toulouse] (TAS), THALES [France], Direction Générale de l'Armement, Direction Generale de l'Armement, NASA Goddard Space Flight Center (GSFC), Laboratoire d'Informatique de Grenoble (LIG), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF), Eric, Dauverchain, and Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Materials science, 010308 nuclear & particles physics, business.industry, Transistor, 02 engineering and technology, Integrated circuit, 021001 nanoscience & nanotechnology, 01 natural sciences, [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, law.invention, Nuclear Energy and Engineering, law, Absorbed dose, 0103 physical sciences, Degradation (geology), Optoelectronics, Irradiation, Electrical and Electronic Engineering, 0210 nano-technology, Dose rate, business, ComputingMilieux_MISCELLANEOUS
Abstract

An accelerated irradiation technique is used to study dose-ASET synergy effects. The impact of TID on SET is found to be identical when the dose rate is switched from high to low or from low to high.

Published
2009

48. Effect of Intergranular Carbides Induced by Gas Nitriding on Rolling Contact Fatigue

Author

Marion Le, Xavier Kleber, Fabrice VILLE, Jérôme Cavoret, Marie-Christine Sainte-Catherine, Laurence Briançon, Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Direction générale de l'armement [Bagneux] (DGA), DCNS Group [Nantes] (DCNS-Nantes), DCNS group, STLE, and Ville, Fabrice

Subjects
[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], [SPI.MECA] Engineering Sciences [physics]/Mechanics [physics.med-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015

49. Nonlinear Image-Based Visual Servo Controller for the Flare Maneuver of Fixed-Wing Aircraft Using Optical Flow

Author

Carlos Silvestre, Pedro Serra, Tarek Hamel, Rita Cunha, Florent Le Bras, Laboratoire d'Informatique, Signaux, et Systèmes de Sophia-Antipolis (I3S) / Equipe SYSTEMES, Signal, Images et Systèmes (Laboratoire I3S - SIS), Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Laboratoire d'Informatique, Signaux, et Systèmes de Sophia Antipolis (I3S), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), and Direction générale de l'armement [Bagneux] (DGA)

Subjects
020301 aerospace & aeronautics, 0209 industrial biotechnology, Engineering, business.industry, Servo control, Optical flow, Touchdown, 02 engineering and technology, Nonlinear control, Visual servoing, Plücker coordinates, [SPI.AUTO]Engineering Sciences [physics]/Automatic, [SPI]Engineering Sciences [physics], 020901 industrial engineering & automation, 0203 mechanical engineering, Control and Systems Engineering, Control theory, Runway, Electrical and Electronic Engineering, business, Simulation, ComputingMilieux_MISCELLANEOUS
Abstract

This paper proposes a nonlinear image-based visual servo controller for the flare phase of the landing maneuver of a fixed-wing aircraft in the presence of wind disturbances. Optical flow and 2-D image features from the image of the runway are exploited to design a feedback controller for the automatic maneuver. The controller is divided in two components. The first component guarantees the horizontal alignment of the aircraft with respect to the runway by exploiting the Plucker coordinates of the lines that delimit the runway as visual features. The second component takes advantage of the optical flow measurements to ensure a smooth touchdown. Simulation results are presented to illustrate the performance of the control approach.

Published
2015

50. Influence of grain boundary cementite induced by gas nitriding on the rolling contact fatigue of alloyed steels for gears

Author

Laurence Briançon, Marion Le, Xavier Kleber, Jérôme Cavoret, Fabrice Ville, Marie C Sainte-Catherine, Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] (LaMCoS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), DCNS Group [Nantes] (DCNS-Nantes), DCNS group, and Direction générale de l'armement [Bagneux] (DGA)

Subjects
Materials science, Cementite, Mechanical Engineering, Metallurgy, Rolling contact fatigue, Surfaces and Interfaces, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], nitriding, Surfaces, Coatings and Films, Micro pitting, chemistry.chemical_compound, pitting, chemistry, Grain boundary, grain boundary cementite, micro-pitting, Nitriding, twin-disc machine
Abstract

International audience; It is well-known that rolling contact fatigue life can be increased by modifying gear surfaces. For instance, gas nitriding is a thermochemical treatment enhancing superficial hardness, and introducing compressive residual stresses but nitriding alloys can lead to the precipitation of cementite at grain boundaries. In this study, experiments were performed on a twin-disc machine to investigate the influence of the microstructure of nitrided layers on rolling contact fatigue failure modes. Nitrided layers with small grains, thin and short grain boundary cementite filaments showed better resistance to surface originated pitting compared with nitrided layers with coarse precipitates, for similar mechanical properties in terms of hardness and residual stresses. Moreover, examinations carried out on cross sections throughout crack networks revealed the influence of these precipitates on the propagation of rolling contact fatigue cracks, which is at the origin of the differences in performance between thin and coarse microstructures

Published
2015

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