120 results on '"National Aerospace"'
Search Results
2. Implementation of the method of boundary integral equations in boundary value problems of gasdynamics
- Author
-
Yuriy Aleksandrovich Krashanitsa; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, A Hoshmandi; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, N Hristenko; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, Yuriy Aleksandrovich Krashanitsa; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, A Hoshmandi; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, and N Hristenko; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em> more...
- Published
- 2018
Catalog
3. Implementation of the method of boundary integral equations in boundary value problems of gasdynamics
- Author
-
Yuriy Aleksandrovich Krashanitsa; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, A Hoshmandi; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, N Hristenko; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, Yuriy Aleksandrovich Krashanitsa; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, A Hoshmandi; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em>, and N Hristenko; <em>National Aerospace University by it. N.E.Joukowsky «KHAI»</em> more...
- Published
- 2018
4. Flight Data Analyses of Fiber Optic Based Airworthy Structural Health Monitoring System for UAV using Artificial Neural Networks
- Author
-
Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, and Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093 more...
- Abstract
This paper presents an airworthy, Fiber Bragg Gratings (FBG) based, Structural Health monitoring System (SHM) system for an Unmanned Aerial Vehicles (UAV). Various design issues pertaining to sensors location, embedment, integration of interrogation system instrumentation, online data recording, implementation of mathematical models for load estimations and GUI based flight data processing software are addressed. FBG data were processed to identify both vibration modes and loads using signal processing techniques and artificial neural network (ANN) algorithms respectively. The issue of sensor malfunctioning is also addressed wherein sensor failure was incorporated in the in-flight data during post processing for various flight regimes. The ANN based methodology was designed for identification of sensor failure and prediction of the estimated strain based on the available values from working (non-failed) sensors. The performance of load estimation was also compared in both the scenario (i.e. in the event of sensor failure and without sensor failure). more...
- Published
- 2015
5. Flight Data Analyses of Fiber Optic Based Airworthy Structural Health Monitoring System for UAV using Artificial Neural Networks
- Author
-
Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, and Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093 more...
- Abstract
This paper presents an airworthy, Fiber Bragg Gratings (FBG) based, Structural Health monitoring System (SHM) system for an Unmanned Aerial Vehicles (UAV). Various design issues pertaining to sensors location, embedment, integration of interrogation system instrumentation, online data recording, implementation of mathematical models for load estimations and GUI based flight data processing software are addressed. FBG data were processed to identify both vibration modes and loads using signal processing techniques and artificial neural network (ANN) algorithms respectively. The issue of sensor malfunctioning is also addressed wherein sensor failure was incorporated in the in-flight data during post processing for various flight regimes. The ANN based methodology was designed for identification of sensor failure and prediction of the estimated strain based on the available values from working (non-failed) sensors. The performance of load estimation was also compared in both the scenario (i.e. in the event of sensor failure and without sensor failure). more...
- Published
- 2015
6. Flight Data Analyses of Fiber Optic Based Airworthy Structural Health Monitoring System for UAV using Artificial Neural Networks
- Author
-
Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, and Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093 more...
- Abstract
This paper presents an airworthy, Fiber Bragg Gratings (FBG) based, Structural Health monitoring System (SHM) system for an Unmanned Aerial Vehicles (UAV). Various design issues pertaining to sensors location, embedment, integration of interrogation system instrumentation, online data recording, implementation of mathematical models for load estimations and GUI based flight data processing software are addressed. FBG data were processed to identify both vibration modes and loads using signal processing techniques and artificial neural network (ANN) algorithms respectively. The issue of sensor malfunctioning is also addressed wherein sensor failure was incorporated in the in-flight data during post processing for various flight regimes. The ANN based methodology was designed for identification of sensor failure and prediction of the estimated strain based on the available values from working (non-failed) sensors. The performance of load estimation was also compared in both the scenario (i.e. in the event of sensor failure and without sensor failure). more...
- Published
- 2015
7. ITERATIVE METHOD FOR BLIND EVALUATION OF MIXED NOISE CHARACTERISTICS ON IMAGES
- Author
-
Abramova, Victoriya V.; National aerospace university “KhAI”, Abramov, Sergiy K.; National aerospace university “KhAI”, Lukin, Volodymyr V.; National aerospace university “KhAI”, Abramova, Victoriya V.; National aerospace university “KhAI”, Abramov, Sergiy K.; National aerospace university “KhAI”, and Lukin, Volodymyr V.; National aerospace university “KhAI” more...
- Abstract
A new method for blind estimation of mixed noise parameters is proposed. The method is based on line fitting into a set of cluster centers obtained from scatter-plot of local variance and mean estimates. Improved estimation of cluster centers is performed on basis of fourth-order statistical moment analysis. The estimation results for the proposed method are compared to the results for other known methods using images from TID2008 database. It is shown that the proposed method provides estimation accuracy comparable to the estimation accuracy of the method based on maximum likelihood estimation of image and noise characteristics (which is considered the best among the existing methods). An advantage of our method is that it is considerably faster. more...
- Published
- 2015
8. Blind estimation of speckle variance in synthetic aperture radar images
- Author
-
Abramova, V. V.; National Aerospace University (KhAI), Kozhemiakin, R.; National Aerospace University (KhAI), Abramov, S. K.; National Aerospace University (KhAI), Lukin, V. V.; National Aerospace University (KhAI), Zelensky, A. A.; National Aerospace University (KhAI), Egiazarian, K. O.; Tampere University of Technology, Abramova, V. V.; National Aerospace University (KhAI), Kozhemiakin, R.; National Aerospace University (KhAI), Abramov, S. K.; National Aerospace University (KhAI), Lukin, V. V.; National Aerospace University (KhAI), Zelensky, A. A.; National Aerospace University (KhAI), and Egiazarian, K. O.; Tampere University of Technology more...
- Abstract
A task of blind estimation of multiplicative noise (speckle) variance in multi-look images acquired by radars with synthesized aperture array is considered. It is shown that there are several factors affecting accuracy of such estimation. The main of them are spatial correlation of the speckle, complexity of an analyzed image and peculiarities of a method used. Spatial and spectral domain approaches are analyzed. It is shown that for both approaches spatial correlation of the speckle is to be estimated and taken into account. Results for real life TerraSAR-X data are presented as illustrations and for analyzing methods' accuracy. more...
- Published
- 2015
9. Experimental study of bispectrum-based encoding in radio communication system
- Author
-
Naumenko, V. V.; National Aerospace University, Kharkiv, Solodovnik, V. F.; National Aerospace University, Kharkiv, Totsky, A. V.; National Aerospace University, Kharkiv, Zelensky, A. A.; National Aerospace University (KhAI), Astola, J. T.; Tampere University of Technology, Naumenko, V. V.; National Aerospace University, Kharkiv, Solodovnik, V. F.; National Aerospace University, Kharkiv, Totsky, A. V.; National Aerospace University, Kharkiv, Zelensky, A. A.; National Aerospace University (KhAI), and Astola, J. T.; Tampere University of Technology more...
- Abstract
This paper is devoted to a novel multi-frequency and bispectrum-based encoding technique designed for radio communication systems. An experimental study of an interference resistance in digital communication is performed using a novel bispectrum-based strategy. Test statistics evaluated in the form of peak values of magnitude bispectrum estimates are proposed for triplet-signals discrimination. Bit error rates assessed experimentally in a radio communication link contaminated by additive Gaussian noise and fading are studied within a wide range of input signal-to-noise ratio (SNR). Advantages of the proposed bispectral-based signal processing as compared with common phase and frequency shift keying are demonstrated and discussed. more...
- Published
- 2015
10. Optimal signal processing for radiometric imaging with multi-antenna & multi-band passive radars
- Author
-
Pavlikov, Vladimir V.; National Aerospace University (KhAI), Zhyla, S. S.; National Aerospace University (KhAI), Kiem, Nguen Van; National Aerospace University named after N.Ye. Zhykovsky "KhAI", Odokienko, O. V.; National Aerospace University named after N.Ye. Zhykovsky "KhAI", Pavlikov, Vladimir V.; National Aerospace University (KhAI), Zhyla, S. S.; National Aerospace University (KhAI), Kiem, Nguen Van; National Aerospace University named after N.Ye. Zhykovsky "KhAI", and Odokienko, O. V.; National Aerospace University named after N.Ye. Zhykovsky "KhAI" more...
- Abstract
The optimal algorithm of multiband spatio-temporal radiometric signal processing is synthesized. Analytical expressions both for the potential fluctuation sensitivity of the system designed according to the algorithm and for the ambiguity function of multiband radiometric systems are deduced. An example of the theory application is demonstrated. more...
- Published
- 2015
11. Optimal algorithm for 3D imaging of spatially extended object
- Author
-
Volosyuk, Valeriy K.; National Aerospace University (KhAI), Pavlikov, Vladimir V.; National Aerospace University (KhAI), Cuong, Vu Ta; National Aerospace University named after N.Ye. Zhykovsky "KhAI", Tymoshchuk, O. M.; National Aerospace University named after N.Ye. Zhykovsky "KhAI", Volosyuk, Valeriy K.; National Aerospace University (KhAI), Pavlikov, Vladimir V.; National Aerospace University (KhAI), Cuong, Vu Ta; National Aerospace University named after N.Ye. Zhykovsky "KhAI", and Tymoshchuk, O. M.; National Aerospace University named after N.Ye. Zhykovsky "KhAI" more...
- Abstract
The optimal algorithm for 3D imaging of a spatially extended object is synthesized using a multi-antenna space-distributed radiometric system. The block diagram of the system implementing the obtained algorithm is given. Expressions for limiting errors of coordinate estimation of each area of the object are obtained. more...
- Published
- 2015
12. Flight Data Analyses of Fiber Optic Based Airworthy Structural Health Monitoring System for UAV using Artificial Neural Networks
- Author
-
Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, and Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093 more...
- Abstract
This paper presents an airworthy, Fiber Bragg Gratings (FBG) based, Structural Health monitoring System (SHM) system for an Unmanned Aerial Vehicles (UAV). Various design issues pertaining to sensors location, embedment, integration of interrogation system instrumentation, online data recording, implementation of mathematical models for load estimations and GUI based flight data processing software are addressed. FBG data were processed to identify both vibration modes and loads using signal processing techniques and artificial neural network (ANN) algorithms respectively. The issue of sensor malfunctioning is also addressed wherein sensor failure was incorporated in the in-flight data during post processing for various flight regimes. The ANN based methodology was designed for identification of sensor failure and prediction of the estimated strain based on the available values from working (non-failed) sensors. The performance of load estimation was also compared in both the scenario (i.e. in the event of sensor failure and without sensor failure). more...
- Published
- 2015
13. Flight Data Analyses of Fiber Optic Based Airworthy Structural Health Monitoring System for UAV using Artificial Neural Networks
- Author
-
Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, and Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093 more...
- Abstract
This paper presents an airworthy, Fiber Bragg Gratings (FBG) based, Structural Health monitoring System (SHM) system for an Unmanned Aerial Vehicles (UAV). Various design issues pertaining to sensors location, embedment, integration of interrogation system instrumentation, online data recording, implementation of mathematical models for load estimations and GUI based flight data processing software are addressed. FBG data were processed to identify both vibration modes and loads using signal processing techniques and artificial neural network (ANN) algorithms respectively. The issue of sensor malfunctioning is also addressed wherein sensor failure was incorporated in the in-flight data during post processing for various flight regimes. The ANN based methodology was designed for identification of sensor failure and prediction of the estimated strain based on the available values from working (non-failed) sensors. The performance of load estimation was also compared in both the scenario (i.e. in the event of sensor failure and without sensor failure). more...
- Published
- 2015
14. Flight Data Analyses of Fiber Optic Based Airworthy Structural Health Monitoring System for UAV using Artificial Neural Networks
- Author
-
Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, and Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093 more...
- Abstract
This paper presents an airworthy, Fiber Bragg Gratings (FBG) based, Structural Health monitoring System (SHM) system for an Unmanned Aerial Vehicles (UAV). Various design issues pertaining to sensors location, embedment, integration of interrogation system instrumentation, online data recording, implementation of mathematical models for load estimations and GUI based flight data processing software are addressed. FBG data were processed to identify both vibration modes and loads using signal processing techniques and artificial neural network (ANN) algorithms respectively. The issue of sensor malfunctioning is also addressed wherein sensor failure was incorporated in the in-flight data during post processing for various flight regimes. The ANN based methodology was designed for identification of sensor failure and prediction of the estimated strain based on the available values from working (non-failed) sensors. The performance of load estimation was also compared in both the scenario (i.e. in the event of sensor failure and without sensor failure). more...
- Published
- 2015
15. Flight Data Analyses of Fiber Optic Based Airworthy Structural Health Monitoring System for UAV using Artificial Neural Networks
- Author
-
Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, Advanced Composites Division, CSIR-NAL, Bangalore, Aeronautical Development Establishment, DRDO, Bangalore., Jain, Saransh; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086928 (Mob) 91-8105708804 Fax: 91-80-25267352, Joseph, Augustin M; Sr. Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086929 (Mob) 91-974038749 Fax: 91-80-25267352, Verma, Kundan Kumar; Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086485 (Mob) 91-9448313178, Gupta, Nitesh; Senior Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086930 (Mob) 91-9480740008 Fax: 91-80-25267352, Sundaram, Ramesh; Senior Principal Scientist Advanced Composites Division (ACD) National Aerospace Laboratories (NAL) Council of Scientific & Industrial Research (CSIR) Kodihalli, Old Airport Road Bangalore - 560017 Tel (Office) 91-80-25086400 (Mob) 91-9448134029, Hariprasad, Manchoor; Scientist E Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093, and Pillai, ACR; Scientist G Aeronautical Development Establishment, DRDO, Bangalore, Karnataka - 560093 more...
- Abstract
This paper presents an airworthy, Fiber Bragg Gratings (FBG) based, Structural Health monitoring System (SHM) system for an Unmanned Aerial Vehicles (UAV). Various design issues pertaining to sensors location, embedment, integration of interrogation system instrumentation, online data recording, implementation of mathematical models for load estimations and GUI based flight data processing software are addressed. FBG data were processed to identify both vibration modes and loads using signal processing techniques and artificial neural network (ANN) algorithms respectively. The issue of sensor malfunctioning is also addressed wherein sensor failure was incorporated in the in-flight data during post processing for various flight regimes. The ANN based methodology was designed for identification of sensor failure and prediction of the estimated strain based on the available values from working (non-failed) sensors. The performance of load estimation was also compared in both the scenario (i.e. in the event of sensor failure and without sensor failure). more...
- Published
- 2015
16. Computer simulation techniques for solving the tasks of optimal design of aerospace composite structures
- Author
-
Andrii Kondratiev; <p><span style="font-family: Times New Roman; font-size: medium;">National Aerospace University “Kharkiv Aviation Institute”</span></p> and Andrii Kondratiev; <p><span style="font-family: Times New Roman; font-size: medium;">National Aerospace University “Kharkiv Aviation Institute”</span></p> more...
- Published
- 2018
17. Statistical synthesis of chopper scanning radiometers
- Author
-
Volosyuk, Valeriy K.; National Aerospace University (KhAI), Pavlikov, Vladimir V.; National Aerospace University (KhAI), Zhyla, S. S.; National Aerospace University (KhAI), Volosyuk, Valeriy K.; National Aerospace University (KhAI), Pavlikov, Vladimir V.; National Aerospace University (KhAI), and Zhyla, S. S.; National Aerospace University (KhAI) more...
- Abstract
In the work, using ideas and methods presented in [1-6], for the first time optimal and quasioptimal algorithms for estimation of radio brightness in chopper scanning radiometers are synthesized and investigated. The corresponding block diagrams of radiometric devices are developed. Expressions for a limiting error of estimation of radio brightness and potential fluctuation sensitivity are obtained. more...
- Published
- 2014
18. Development of the theory, methods and algorithms of optimal ultrawideband space-time signal processing for radio-thermal radiation
- Author
-
This study was supported by the Russian Foundation for Basic Research, project no. 12-02-90425, and by the National Academy of Sciences of Ukraine, project no. 55-02-12., Volosyuk, Valeriy K.; National Aerospace University (KhAI), Kravchenko, Victor F.; Kotelnikov Institute of Radio Engineering and Electronics, RAS, Pavlikov, Vladimir V.; National Aerospace University (KhAI), This study was supported by the Russian Foundation for Basic Research, project no. 12-02-90425, and by the National Academy of Sciences of Ukraine, project no. 55-02-12., Volosyuk, Valeriy K.; National Aerospace University (KhAI), Kravchenko, Victor F.; Kotelnikov Institute of Radio Engineering and Electronics, RAS, and Pavlikov, Vladimir V.; National Aerospace University (KhAI) more...
- Abstract
A new concept for solving statistical synthesis problems of radiometric devices and systems (RDS) is developed. The reasonability of using ultra-wideband (UWB) RDSs is substantiated. The basic data of mathematical apparatus of V-transforms employed when processing space-time UWB fields and their statistical characteristics is given. A wide class of UWB RDS statistical synthesis problems (compensation, zero-type, modified modulation type, modulation compensation type, multi-antenna systems including cross-correlation-compensation systems and aperture synthesis systems) of the stationary and scanning types are solved. The appropriateness of using the Kravchenko weighting functions for refinement of primary radiometric images in radiometric scanning devices is substantiated. more...
- Published
- 2014
19. AN IMPROVED PREDICTION OF DCT-BASED IMAGE FILTERS EFFICIENCY USING REGRESSION ANALYSIS
- Author
-
Rubel, Oleksii S.; National Aerospace University "KhAI", Lukin, Volodymyr V.; National Aerospace University "KhAI", Rubel, Oleksii S.; National Aerospace University "KhAI", and Lukin, Volodymyr V.; National Aerospace University "KhAI" more...
- Abstract
Efficiency of DCT-based filters for a wide-class of images is investigated. The study is carried out for additive white Gaussian noise (AWGN) case with several intensity levels. Local DCT-based filter is used as basic denoising technique. Nonlocal BM3D filter known as the state-of-the-art technique for AWGN removal is also exploited. A precise prediction method of denoising efficiency for several quality metrics is proposed. It is shown that statistics of DCT coefficients provides useful information. Regression models for analyzed filters and metrics are presented. The obtained dependence approximations of quality metrics on DCT statistics have high goodness of fit. One-parameter and multi-parameter fitting cases are considered. The most valuable DCT statistics are found. more...
- Published
- 2014
20. The family of atomic functions and digital signal processing in synthetic aperture radar
- Author
-
Kravchenko, Victor F.; Kotelnikov Institute of Radio Engineering and Electronics, RAS, Volosyuk, Valeriy K.; National Aerospace University (KhAI), Pavlikov, Vladimir V.; National Aerospace University (KhAI), Kravchenko, Victor F.; Kotelnikov Institute of Radio Engineering and Electronics, RAS, Volosyuk, Valeriy K.; National Aerospace University (KhAI), and Pavlikov, Vladimir V.; National Aerospace University (KhAI) more...
- Abstract
The report consists of two parts. In the first part, the sampling analysis of weight windows is conducted on the basis of atomic functions (AF) and their application in problems of the classical method of synthetic aperture radar (SAR) is considered. The second part contains fundamentals of a modified method of synthetizing the aperture. The modified ambiguity function for different signals is probed. The lacks of the Ambiguity function are detected at a modified method. The paths of elimination of the indicated lacks are offered by introduction of weight processing in a technique of the modified method. The expediency of application of weight windows based on AF in reduced problems is empirically justified. more...
- Published
- 2007
21. Multi-base INSAR with enhanced signal processing
- Author
-
Ksendzuk, Alexander V.; National Aerospace University (KhAI), Volosyuk, Valeriy K.; National Aerospace University (KhAI), Ksendzuk, Alexander V.; National Aerospace University (KhAI), and Volosyuk, Valeriy K.; National Aerospace University (KhAI) more...
- Abstract
Synthetic aperture radar interferometer provides three-dimensional information by using the phase as an information source. An interferogram contains the amplitude as well as the phase information of a SAR image pair. The resultant phase of the interferogram is only measured modulo 2π. To calculate the elevation of each point it is necessary to add the correct integer number of phase cycles to each phase measurement. The problem of solving this 2π-ambiguity is called phase unwrapping. On the one hand decrease of the interferometer's carrier frequency causes larger altitude variation which can be resolved without ambiguity. However, on the other hand decrease of carrier frequency causes decrease of accuracy of the relief altitude estimation. This contradiction may be resolved for example in the multi-frequency interferometric system, but it is expensive. This paper presents a method for the phase-ambiguity resolution in the two-frequency interferometer. By multiplying signals with different carrier frequency, it is possible to resolve phase-ambiguity as well as provide high-precision of relief altitude estimation. This work presents an analytic equation for the errors in the InSAR, for the carrier frequency calculation. The modeled results show accurate relief estimation as well as phase ambiguity resolution. more...
- Published
- 2003
22. Sum-type Kaiser-Bessel windows for apodized antenna arrays
- Author
-
Anukhin, I. P.; Kharkov Aviation Institute, Lukin, V. V.; National Aerospace University (KhAI), Ponomarenko, N. N.; National Aerospace University (KhAI), Zelensky, A. A.; National Aerospace University (KhAI), Saramaki, Tapio; Signal Processing Lab., Tampere, Zbaida, K.; Signal Processing Lab., Tampere, Anukhin, I. P.; Kharkov Aviation Institute, Lukin, V. V.; National Aerospace University (KhAI), Ponomarenko, N. N.; National Aerospace University (KhAI), Zelensky, A. A.; National Aerospace University (KhAI), Saramaki, Tapio; Signal Processing Lab., Tampere, and Zbaida, K.; Signal Processing Lab., Tampere more...
- Abstract
A class of sum-type Kaiser-Bessel windows is introduced. These windows are optimized for improving the performance of apodized array patterns. Compared with the basic Kaiser-Bessel windows, the proposed windows are shown provide several benefits. more...
- Published
- 1997
23. Sectionalized antenna array with a controlled zone of local sidelobe suppression
- Author
-
Zelensky, A. A.; National Aerospace University (KhAI), Lukin, V. V.; National Aerospace University (KhAI), Merkushev, V. N.; Kharkov Aviation Institute (Technical University), Zelensky, A. A.; National Aerospace University (KhAI), Lukin, V. V.; National Aerospace University (KhAI), and Merkushev, V. N.; Kharkov Aviation Institute (Technical University) more...
- Abstract
For spaceborne and airborne Synthetic Aperture Radar (SAR) antennas, the problem of sensed Earth strip variation and simultaneous terrain backscatter or irradiated clutter signal suppression, in a given angular sector, is actual. This problem can be solved by using various approaches and techniques. Often it is desirable to provide a sufficient simplicity of the control system based on the variation of a limited set of antenna aperture amplitude and phase distribution parameters. Besides, such antennas frequently contain a number of sub-apertures.Our paper presents the structure of such a sectionalized array, for which the sensed strip and clutter suppression in the local zone position variation is obtained due to a variation of the relative amplitude and phase relationships for sub-apertures. Besides, amplitude factors within each sub-aperture remain constant, and phase shifts are identical but depend on the angular position of the sensed strip center.It is shown that depending on the width of the sector of desired sidelobe suppression, as well as on its displacement with respect to the sensed strip, the obtained clutter suppression varies from -22 to -50 dB. As the problem has several possible solutions, the recommendations are given for taking into account the other factors. In particular, these are the pattern main lobe width, the limits of reasonable variation of amplitude and phase relationships, construction and technological peculiarities of antenna manufacturing, etc. Other approaches to providing the desirable SAR characteristics are discussed relating to the use of antenna arrays with the digital signal processing. more...
- Published
- 1995
24. Review of modern algorithms for high resolution imaging with passive radar
- Author
-
Volosyuk, Valeriy K.; National Aerospace University (KhAI), Kravchenko, Victor F.; Kotelnikov Institute of Radio Engineering and Electronics, RAS, Kutuza, B. G.; Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Pavlikov, V. V.; Scientific and Technological Center of Unique Instrumentation, Russian Academy of Sciences, Moscow, Volosyuk, Valeriy K.; National Aerospace University (KhAI), Kravchenko, Victor F.; Kotelnikov Institute of Radio Engineering and Electronics, RAS, Kutuza, B. G.; Institute of Radio Engineering and Electronics, Russian Academy of Sciences, and Pavlikov, V. V.; Scientific and Technological Center of Unique Instrumentation, Russian Academy of Sciences, Moscow more...
- Abstract
A review of modern optimal and quasi-optimal algorithms for radiometric signal processing, which provide images with a high spatial resolution is given. It is shown that the high resolution is achieved with ultra-wideband or multi-band time or space-time signal processing. Analytical expressions for the limiting error of image estimation, ambiguity functions and potential fluctuation sensitivity of systems designed according to the algorithms are derived. more...
- Published
- 2015
25. 小型自動着陸実験(ALFLEX)の実施体制
- Author
-
National Aerospace Laboratory, NAL/NASDA HOPE Team, 航空宇宙技術研究所, NAL/NASDA HOPE共同研究チーム, National Aerospace Laboratory, NAL/NASDA HOPE Team, 航空宇宙技術研究所, and NAL/NASDA HOPE共同研究チーム
- Abstract
ALFLEX (Automatic Landing Flight Experiment) was conducted to establish automatic landing technology for the space reentry vehicle HOPE (H-2 rocket Orbiting Plane). National Aerospace Laboratory (NAL) and NASDA, cooperating the HOPE program, jointly organized a team and carried out the preliminary experiment at Nagoya in Japan and the automatic landing experiment at Woomera in Australia. This paper describes the administration of general affairs for the domestic hanging flight test and the automatic landing flight experiment in Australia., 航空宇宙技術研究所(NAL)とNASDAはH-2ロケット打上げ型有翼回収機(HOPE)の研究開発の一環として、宇宙往還技術試験機(HOPE-X)形状機体の自動着陸技術の実証などを目的とした小型自動着陸実験(ALFLEX)計画を進めて来たが、1995年10月から1996年1月にヘリコプタによる懸吊試験を伊勢湾上空で実施し、1996年6月から8月に自動着陸実験を豪州南オーストラリア州のウーメラ飛行場で実施した。本報告はこのALFLEXプロジェクトの推進に伴うNAL、NASDA、メーカおよび豪州関係者を含めた実施・協力体制および広報活動、実験実施環境整備などの一般管理に関することがらについてまとめたものである。 more...
- Published
- 2015
26. 第60回・第61回風洞研究会議論文集
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
The following subjects are described: the pulsating wind tunnel and Magnetic Suspension Balance System (MSBS), application of pressure and temperature sensitive paints to the cryogenic wind tunnel studies, PIV (Particle Image Velocimetry) using pulsed YAG (Yttrium Aluminum Garnet) lasers, aerodynamic heating experiments on a HOPE-X (H-2 Orbiting Plane Experimental), a comparative aerodynamic heating test of 09HOPE (H-2 Orbiting Plane) with the NAL hypersonic wind tunnel, a cryogenic wind tunnel test on HOPE model at high Reynolds numbers, and the pressure field imaging camera system., 次のテーマについて記述した。船舶技術研究所の変動風水洞と磁力支持天秤装置(MSBS)、感圧・感温塗料の低温風洞への応用、パルスYAG(イットリウム・アルミニウム・ガーネット)レーザPIV(粒子画像流速測定法)、HOPE-X(宇宙往還技術試験機)模型の空力加熱試験、NAL極超音速風洞における09HOPE(H-2ロケット打ち上げ型有翼回収機)熱対応風試、HOPE極低温高レイノルズ数風洞試験、および光学的圧力分布観測装置。 more...
- Published
- 2015
27. 回転翼部門企画パネルディスカッション:日本における回転翼騒音研究の現状と将来
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
The aeroacoustic research activity of rotorcraft in Japan has been discussed. The main institutes, universities and companies have participated in the panel discussion, namely Tokyo University, National Aerospace Laboratory, Advanced Technology Institute of Commuter Helicopter (ATIC), Ishikawajima-Harima, Kawasaki, Mitsubishi and Fuji Heavy Industries. The topics to discuss are as follows: the brief talk with the aeroacoustic research activity in each institutes and companies, the measurement technology and its application in each institutes and companies, the present status of aeroacoustic analysis including CFD (Computational Fluid Dynamics) techniques and its application into design, the research activity for rotorcraft aeroacoustics in NAL and its role for other institutes and companies and the research cooperation and its organization with foreign research institutes. This report describes the brief summary of the panel discussion., 日本における回転翼機の空力騒音研究についてパネルディスカッションの形式で討論が行われた。パネリストは東京大学、航空宇宙技術研究所、コミュータヘリコプタ先進技術研究所(ATIC)、石川島播磨重工業、川崎重工業、三菱重工業、富士重工業の主な代表者である。議論された内容は、各機関・各社における回転翼騒音研究の概要(機内、機外)、ヘリコプタ騒音の計測技術と対策、CFD(数値流体力学)を含む騒音解析の現状と設計への反映、航技研での回転翼騒音研究の役割と航技研への要望、国内・国外との研究協力および体制である。本報告は、パネルディスカッションでの討論内容を要約したものである。 more...
- Published
- 2015
28. 第15回航空機計算空気力学シンポジウム論文集
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
The following subjects on CFD (Computational Fluid Dynamics) are discussed: (1) SST (Supersonic Transport), scaled high-speed experimental aircraft, aerodynamic design of a SST wing, bleed and bypass effects of nacelles; (2) high enthalpy flows, chemical reaction model of aerodynamic heating, shock wave induced unsteady aerodynamic heating; (3) aircraft engine/space propulsion, three dimensional unsteady flow analysis in turbomachinery; (4) rotor, flowfields around main rotor, development of rotor CFD codes, and (5) turbulence, turbulence of compressible flows, turbulent heat transfer in a channel between parallel plates., CFD(数値流体力学)に関する次の主題を論じている。(1)SST(超音速輸送)、小型高速実験機、SSTの主翼空力設計、ナセルのブリード流/バイパス流効果、(2)高エンタルピー流れ、空力加熱の化学反応モデル、衝撃波誘起非定常空力加熱、(3)航空エンジン/宇宙推進、航空機エンジン内の3次元非定常流れ解析、(4)回転翼、ヘリコプタ・メインロータ周りの流れ、ロータCFDコードの開発、および(5)乱流、圧縮性流体の乱流、平行平板間の乱流熱伝達。 more...
- Published
- 2015
29. International Workshop on Numerical Simulation Technology for Design of Next Generation Supersonic Civil Transport
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
Studies on the following topics in each section of the workshop are reported: (1) 'research toward the next generation SST' and 'NAL's SST research project' as general lectures; (2) 'designing SST and requirement on CFD' for the general session; (3) 'NAL's CFD-aided design research', 'numerical optimization' and 'treatment of multidiscipline' for the technical session 1; (4) 'next generation computer system for designing' and 'fundamental problems in CFD' for the technical session 2., ワークショップの各部会における以下の課題について発表された研究が報告されている。(1)一般講義では、「次世代SSTに向けての研究」および「NALのSST研究プロジェクト」、(2)一般部会では、「SSTの設計とCFDに対する必要条件」(3)技術部会1では、「NALのCFD支援設計研究」、「数値最適化」および「多分野にわたる研究」、(4)技術部会2では、「設計のための次世代コンピュータシステム」および「CFDにおける基本的問題」。 more...
- Published
- 2015
30. 航空宇宙技術研究所特別資料 第12回航空機計算空気力学シンポジウム論文集
- Author
-
Organ. Commit. of NAL Symp., National Aerospace Laboratory, 航空機計算空気力学シンポジウム運営委員会, 航空宇宙技術研究所, Organ. Commit. of NAL Symp., National Aerospace Laboratory, 航空機計算空気力学シンポジウム運営委員会, and 航空宇宙技術研究所
- Abstract
Altogether 57 papers are collected, among which is the invited lecture by Professor A. Jameson of Princeton University giving an overview of the current status of CFD (Computational Fluid Dynamics) as the aircraft aerodynamic design tool. In addition to the usual computational analysis of external flow, the topics of the papers include the direct numerical simulation of the turbulence, the combustor flows within turbojet as well as ram/scramjet engines and the performance assessment of the NAL parallel vector computer system called, 'NWT'., プリンストン大学A.Jameson教授による招待講演「航空機用CFDの現状」を含め合計57件の論文を集めた。取り扱われている課題は、従来の物体回りの流れの数値解析のほか、乱流の直接シミュレーション、ターボジェットおよびラム/スクラムジェットエンジン燃焼器の中の流れ、航空宇宙技術研究所の並列ベクトル計算機システム「NWT」の性能評価などを含む。 more...
- Published
- 2015
31. HYFLEX/HOPEシンポジウム講演論文集
- Author
-
National Space Development Agency of Japan, National Aerospace Laboratory, 宇宙開発事業団, 航空宇宙技術研究所, National Space Development Agency of Japan, National Aerospace Laboratory, 宇宙開発事業団, and 航空宇宙技術研究所
- Abstract
The following topics were discussed: spaceplane development plan, H-2A rocket, HOPE-X (H-2 Orbiting Plane Experiment), ALFLEX (Automatic Landing Flight Experiment), J-1 rocket, and status of HYFLEX (Hypersonic Flight Experiment) development such as trajectory design, navigation system, flight control, electrical components, aerothermodynamic characteristics, aerodynamics, measurement program, aerodynamic heating, ADS (Air Data Sensor) measurement, gas jet interaction, and thermal protection system., 以下の主題を論じた。宇宙往還機開発計画、H-2Aロケット、HOPE-X(宇宙往還技術試験機)、ALFLEX(小型自動着陸実験)、J-1ロケット、飛行経路設計、航法系、姿勢制御、電気系、熱特性、空力特性、計測計画、空力加熱計測、ADS(大気データセンサ)計測、ガスジェット干渉、および熱防護系などのHYFLEX(極超音速飛行実験)の開発の現況。 more...
- Published
- 2015
32. 大型極超音速風洞の計画と構造:極超音速風洞システムの概要
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
Main characteristics, outlines of facilities, design methodologies and details of the equipments used are described for the NAL (National Aerospace Laboratory)'s new hypersonic wind tunnel system which is now under construction. This system, which is scheduled to be completed around the end of FY 1994, consists of the existing phi 50 cm tunnel and the new phi 1.27 m leg with a nozzle of a Mach number of 10. The new leg is being constructed parallel to the existing tunnel which has nozzles of Mach numbers of 5, 7, 9 and 11; not only the tunnel scale, but also daily operational cycles become approximately 2.5 times those of the existing tunnel. The operational conditions of the new leg are as follows: stagnation conditions of To = 600-1,200 K and Po = 1-10 MPa, Mach number = 10, Re = 3 x 10(exp 5)-4.5 x 10(exp 6)/m and a viscous parameter of bar V = M/square root of Re = 0.005-0.014. The operational conditions of the NAL's hypersonic wind tunnel system could cover the flight conditions of a winged space vehicle such as the Space Shuttle and the Japanese future unmanned winged reentry vehicle HOPE in M-Re and M-M/square root of Re maps in its Mach number range of M = 5-11., 1991年度から4年計画で建設が進められている当研究所の極超音速風洞システムについて、その基本計画、基本設計および基本特性に関する概要ならびに風洞の本体、諸設備、制御・計測装置、建屋・電源およびシステム運用に関する詳細について述べる。極超音速風洞の大型化整備としては、既設極超音速風洞に平行にマッハ数10,ノズル出口直径1.27mの大型極超音速風洞を併設し、マッハ数範囲の広い(5-11)既設風洞を極超音速空力研究目的に、大型風洞を開発用詳細データ取得目的に使い分けるものとする。また近年の極超音速風洞利用の需要増大に鑑み、風洞データ生産性向上のため、通風能力を既設風洞の2.5倍を目途とした諸設備の増強を行った。これら両風洞と容量・機能増強を図った諸設備の全体を、極超音速風洞システムとする。これにより当研究所は、米国空軍所属の世界最大の空気作動型極超音速風洞と同等のスケールの極超音速風洞を保持することとなる。本報告は、極超音速風洞大型化構想とそれに基づいた基本設計、基本特性ならびにそれを具体化した風洞システム・運用について述べることにより、諸制約の下での極超音速風洞の設計の手順と、風洞各部の詳細構造を明らかにするものである。 more...
- Published
- 2015
33. 航空宇宙技術研究所年報: 平成12年度
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Published
- 2015
34. NAL research progress, 1997
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
The following subjects are described as the research highlights: (1) 'Computational and Experimental Aerodynamics' including the hypersonic compression ramp heat transfer; (2) 'Materials and Structures' including thermal protection system of HYFLEX vehicle; (3) 'Control and Guidance' including crew behavioral models for timeline analysis; (4) 'Aircraft Propulsion' including methane-fueled ramjet combusters for supersonic flight; (5) 'Space Propulsion and Transportation System' including measurements of scramjet engine performance; and (6) 'Space Technology and Application' including solar thermal thruster made of single crystal molybdenum., 研究ハイライトとしてつぎの課題について記述している。(1)極超音速圧縮傾斜熱伝達の研究を含む「計算流体力学および実験流体力学」、(2)HYFLEXの熱防御システムの研究を含む「材料および構造」、(3)タイムライン解析のための乗員挙動モデルの研究を含む「制御と誘導」、(4)超音速飛行のためのメタン燃料ラムジェット燃焼器の研究を含む「航空機推進」、(5)スクラムジェット・エンジン性能の研究を含む「宇宙推進と輸送システム」、および(6)モリブデン単結晶製の太陽熱スラスタについての研究を含む「宇宙技術とその応用」。 more...
- Published
- 2015
35. ラムジェットエンジン試験設備
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
The ability to efficiently develop ram and scramjet engines is influenced by ground facilities. The National Aerospace Laboratory of Japan constructed a Ramjet engine Test Facility (RJTF) at the Kakuda Research Center in 1994. It can duplicate engine test conditions in the range of flight Mach numbers from 4 to 8. The facility can supply non-vitiated air for M4 and M6 to identify the contamination effect in the vitiated air, to provide the basis for evaluating engine performance in the M8 flight condition. This paper outlines the unique features and operating characteristics of the RJTF. The quality of air stream obtained during facility calibration, and the facility-engine interaction are described. Finally, tests of an H2-fueled scramjet that are currently underway are reviewed., 極超音速域で作動する新しい推進機関であるラム・スクラムジェットエンジンの開発には、それらを試験するための地上試験設備、エンジン風洞が必要である。そこで航空宇宙技術研究所では1994年、わが国初の極超音速エンジン風洞(ラムジェットエンジン試験設備:RJTF)を角田研究センタに建設した。このRJTFは飛行マッハ数で4から8条件下でラム・スクラムジェットエンジンを試験するもので、マッハ数4と6では蓄熱体加熱による空気を、またマッハ8条件ではさらに燃焼加熱を併用して最高2,600Kまで空気を風洞に供給できる。特にマッハ6条件では蓄熱体加熱方式と燃焼加熱方式による2つの加熱法を比較することにより、空気加熱方式によるエンジン性能への影響を調べられる。ここではこの世界でも有数なエンジン風洞であるRJTFの特長とその設計方針についてまとめた。そしてマッハ4からマッハ8における運転モードとその作動特性、ノズル出口の気流の一様性や境界層計測などの風洞としての気流検定について整理した。そして最後に現在進めている水素を燃料とするスクラムジェットエンジンの試験結果について概説する。 more...
- Published
- 2015
36. 航空宇宙技術研究所年報: 平成6年度
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
The course of the National Aerospace Laboratory for 40 years and research activities in each department during the past ten years and the facilities improvement of the Laboratory are described. Also, overviews of research works in FY (Fiscal Year) 1994 and the STOL (Short Take Off and Landing) project are presented. Moreover, the research activities of each department in FY 1995 are introduced in form of table about research item, laboratory in charge, person in charge, and object, outline and progress of researches. The introduced principal research items are as follows: (1) principal super high speed aerodynamics; (2) study of aeroelasticity; (3) study of fluid dynamic noise; (4) study of analysis of nonlinear equations and its applications; (5) study of analysis of high precision viscous aerodynamic performance of high speed aircraft and its design; (6) study of dynamic loads; (7) study of overall performance of propulsion system for aircraft; (8) study of automatic control systems of flying objects; (9) study of flight systems; (10) study of space plane technology; (11) considerations of research facilities for space environment utilization; (12) study of elements of advanced liquid rocket engines; (13) department and testing of HOPE structures and study of structural materials; (14) study of innovative aerospace transport technology; and (15) comprehensive management of HOPE (H-2 Orbiting Plane) cooperative development., 航空宇宙技術研究所の40年間の経緯、過去10年間の各部の研究活動と設備整備を述べ、1994年度における研究業務の概要と短距離離着陸(STOL)プロジェクトを説明した。また、1994年度における各部の研究活動を研究項目、研究室、担当者、研究の目的・概要・経過の各項目について、一覧表の形で示した。紹介されている主な研究項目は次の通りである。空気力学部:超高速空気力学の研究など17項目、構造力学部:空力弾性の研究などの7項目、熱流体力学部:次世代推進システムの流体騒音に関する研究など14項目、数理解析部:非線形方程式の解析と応用の研究など6項目、空力性能部:高速機の高精度粘性空力性能解析・設計の研究など33項目、機体部:動的荷重の研究など9項目、原動機部:航空用推進システムの総合性能の研究など13項目、制御部:飛翔体の自動制御方式に関する研究など8項目、飛行実験部:飛行システムに関する研究など10項目、新型航空機研究グループ:宇宙住還技術の研究など15項目、宇宙研究グループ:宇宙環境利用研究設備の検討など26項目、ロケット推進研究部:先進液体ロケットエンジン要素の研究など9項目、ラムジェット推進研究部:HOPE構造開発試験および材料構造技術の研究など10項目、スペースプレーンチーム:革新航空宇宙輸送技術の研究、HOPEチーム:HOPE共同開発研究の総合管理など11項目。 more...
- Published
- 2015
37. 航空宇宙数値シミュレーション技術シンポジウム2000論文集
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
The following topics on aerospace numerical simulation were discussed: computational fluid dynamics, development of super sonic transports, reusable space transportation systems, aero-engine simulation, computer development, numerical wind tunnels, the computational aerodynamics system for performance evaluation and research, airfoil stall, aerothermodynamic environments, transonic flow analysis, aerodynamic design, nozzle flow, fluid flow in rotating heated curve pipes, flow visualization, flap distortion, turbulence analysis, take-off characteristics, aeroelasticity analysis, tip leakage vortex breakdown, blade wake interaction, supersonic pulse jets impinging, mixing enhancement, and boundary layer thickness., 航空数値シミュレーションに関する、以下の主題を論じている。計算流体力学、超音速旅客機および宇宙往還機開発、航空用エンジンシミュレーション、計算機開発、数値風洞、航空機性能評価システム、翼型失速、熱空力環境、遷音速流解析、空力設計、ノズル流れ、回転曲管内流、流れの可視化、フラップ歪み、乱流解析、離陸時特性、空力弾性解析、翼端漏れ渦崩壊、翼後流相互作用、超音速パルスジェット衝突、混合促進、および境界層厚。 more...
- Published
- 2015
38. 平成14年度航空安全・環境適合技術研究研究交流会と研究報告会講演論文集
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
Special Publication of National Aerospace Laboratory, 航空宇宙技術研究所特別資料
- Published
- 2015
39. 極超音速飛行実験機(HYFLEX)の空力特性
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
The Hypersonic Flight Experiment (HYFLEX) vehicle successfully performed a hypersonic lifting flight. The vehicle was developed to establish the basic technologies necessary for an unmanned shuttle vehicle. In this report, the primary aerodynamic characteristics derived from analysis of the flight data are presented. They are aerodynamic force coefficients, longitudinal trim characteristics, stability and control derivatives, elevon hinge moment coefficient, and surface pressure distribution. The flight results are compared with the preflight predictions based on wind tunnel tests and CFD (Computational Fluid Dynamics) calculations. The purpose of the comparison is to evaluate the validity of the prediction methods including the development of aerodynamic uncertainties in the vehicle design process. The flight results agreed well with the predictions. This shows that the prediction methods are generally valid for the design of a lifting reentry vehicle with a high angle of attack. On the other hand, some differences between the flight results and the predictions were found in axial force coefficient, elevon trim deflection, and RCS (Reaction Control Subsystem) gas-jet interaction. The causes of these are also discussed in this report., 極超音速飛行実験機(HYFLEX)は、我が国で初めての極超音速揚力飛行を行うことに成功した。この実験機は、無人宇宙往還機に必要な基礎技術を確立するために開発されたものである。本報告では、飛行データの解析により得られた主要な空力特性およびその予測結果との比較を示す。それらは、空力係数、縦トリウム特性、空力微係数、エレボンヒンジモーメント係数、表面圧力分布である。飛行結果と比較した予測値は、風洞試験やCFD(計算流体力学)計算に基づき設定されたものである。比較の目的は、設計の過程における不確定性の設定も含めて、予測法の妥当性を評価することにある。飛行結果は概ね予測値に一致したが、このことは今回使用した予測法が高迎角で飛行する再突入揚力体の設計に有効であることを示している。その一方で、軸力係数、エレボントリム舵角、RCS(ガスジェット姿勢制御システム)ガスジェット干渉について、飛行結果と予測値の間に差が見られたため、それらの原因も考察する。 more...
- Published
- 2015
40. Small Satellite Symposium 2003
- Author
-
National Aerospace Laboratory, 航空宇宙技術研究所, National Aerospace Laboratory, and 航空宇宙技術研究所
- Abstract
Special Publication of National Aerospace Laboratory, 航空宇宙技術研究所特別資料
- Published
- 2015
41. Optimal restoration of radiometric images in ultrawideband radiometric systems with multi-antenna array
- Author
-
Pavlikov, Vladimir V.; National Aerospace University (KhAI) and Pavlikov, Vladimir V.; National Aerospace University (KhAI)
- Abstract
In the work, for the first time the problem of synthesis algorithms of optimal and quasioptimal radiometric signal processing for restoration of radiometric images in ultrawideband radiometers with a multi-antenna array is solved. The potential accuracy of estimation is calculated. It is shown that the quasioptimal algorithm is close to the algorithm realized in the aperture synthesis systems and used in radio astronomy. more...
- Published
- 2014
42. Forming of healthy way of life of student young people
- Author
-
Баканова, Александра Феликсовна; Kharkov National Aerospace University and Баканова, Александра Феликсовна; Kharkov National Aerospace University
- Abstract
Concepts are considered physical health and healthy way of life. The component components of concept of healthy way of life are presented. The results of questionnaire of students are presented. The low level of understanding of semantic maintenance of concepts students is marked physical development, physical preparedness, physical health. It is set that the healthy way of life is determined the area of individual prosperity. It is underlined that understanding of health is taken to the good feel. Determinatives are set in the choice of sporting sections and facilities of physical development. Directions of introduction of the automated system of collection of information are shown., Рассмотрены понятия физическое здоровье и здоровый образ жизни. Представлены составные компоненты понятия здорового образа жизни. Представлены результаты анкетирования студентов. Отмечается низкий уровень понимания студентами смыслового содержания понятий физическое развитие, физическая подготовленность, физическое здоровье. Установлено, что здоровый образ жизни определяется зоной индивидуального благополучия. Подчеркивается, что понимание здоровья сводится к хорошему самочувствию. Установлены определяющие факторы в выборе спортивных секций и средств физического развития. Показаны направления внедрения автоматизированной системы сбора информации., Розглянуті поняття фізичне здоров'я й здоровий спосіб життя. Представлені складені компоненти поняття здорового способу життя. Представлені результати анкетування студентів. Відзначається низький рівень розуміння студентами значеннєвого змісту понять фізичний розвиток, фізична підготовленість, фізичне здоров'я. Установлено, що здоровий спосіб життя визначається зоною індивідуального благополуччя. Підкреслюється, що розуміння здоров'я зводиться до гарного самопочуття. Установлені визначальні фактори у виборі спортивних секцій і засобів фізичного розвитку. Показані напрямки впровадження автоматизованої системи збору інформації. more...
- Published
- 2011
43. Solar Thermal Utilization: Past, Present and Future
- Author
-
NATIONAL AEROSPACE LAB BANGALORE (INDIA), Rajam, K S, NATIONAL AEROSPACE LAB BANGALORE (INDIA), and Rajam, K S
- Abstract
See also ADA560467. Indo-US Science and Technology Round Table Meeting (4th Annual) - Power Energy and Cognitive Science Held in Bangalore, India on September 21-23, 2010. U.S. Government or Federal Purpose Rights License more...
- Published
- 2010
44. Joints of Articles made of Polymer Composite Materials
- Author
-
KHARKOV NATIONAL AEROSPACE UNIV (UKRAINE), Karpov, Yakov S., KHARKOV NATIONAL AEROSPACE UNIV (UKRAINE), and Karpov, Yakov S.
- Abstract
This report results from a contract tasking National Aerospace University as follows: High effectiveness of joints with transversal micro-fasteners, embedded in composite article, is proved experimentally in previous papers by the project manager. Project scope is working out structural and manufacturing solutions for metal-composite joints and correspondent of mathematical and experimental methods of engineering analysis. Following objectives are suggested to be considered in this project: (1) working out mathematical models and unified technique for determination stressed-strained state of joints with discrete, continuous and combined joining layer at arbitrary geometrical and rigidity parameters through the length of joining articles made of composites; (2) analysis of compliance coefficients influence on maximum stresses in articles and conformation of analysis formulas for determination compliance coefficients of micro-fasteners (0.8
more... - Published
- 2010
45. Training Effectiveness of Embedded Training in a (Multi-) Fighter Environment
- Author
-
NATIONAL AEROSPACE LAB AMSTERDAM (NETHERLANDS), Roessingh, J J, Verhaaf, G G, NATIONAL AEROSPACE LAB AMSTERDAM (NETHERLANDS), Roessingh, J J, and Verhaaf, G G
- Abstract
By feeding simulated threats into the available sensor channels of the fighter aircraft in-flight, the threat appears lifelike to the pilot. This allows tactical training against a virtual force, or against a real force that can be virtually augmented: embedded training. Since the late 1990s, NLR and Dutch Space have cooperated in transforming embedded training from a concept to reality for the F-35 Joint Strike Fighter. Single-ship capability was demonstrated in 2004 on an operational Royal Netherlands Air Force F-16 (see Krijn and Wedzinga, 2004). In 2007, the multi-ship demonstration at Lockheed Martin provided further insight into the technical maturity and the additional advantages of multi-ship embedded training. Using multi-ship embedded training, fighter pilots can train in-flight within one shared tactical environment. To implement this capability, each aircraft is fitted with a computer system with embedded training software. The software uses an existing data-link to ensure each aircraft has the same tactical picture. Early 2009, Dutch Space and NLR received the go-ahead from Lockheed Martin to further develop embedded training for the F-35 Joint Strike Fighter., See also ADA562526. RTO-MP-HFM-169 Human Dimensions in Embedded Virtual Simulation (Les dimensions humaines dans la simulation virtuelle integree)., The original document contains color images. more...
- Published
- 2009
46. MAV2008: 1st US-Asian Demonstration and Assessment of Micro Air Vehicle (MAV) and Unmanned Ground Vehicle (UGV) Technology. Schedule of Events, Abstracts and Profiles
- Author
-
NATIONAL AEROSPACE LAB BANGALORE (INDIA), Upadhya, A. R., Shubha, V., Stierna, Eric, NATIONAL AEROSPACE LAB BANGALORE (INDIA), Upadhya, A. R., Shubha, V., and Stierna, Eric
- Abstract
The activity brought together teams from around the world to address these challenges for micro air vehicles (MAVs): flight, cooperative flight, cooperation with ground-based vehicles, loitering, and sensing surroundings. The test scenario mission was to assist commandos rescue hostages being held by insurgents in a bank building. There were booby traps (mines and explosives) laid around the building and insurgents circling the building in a vehicle. The MAVs and UGVs, working together, were to assist in decommissioning the mines, identify the locations of the explosives and hostages and identify a path for ingress by the commandos. At least 12 teams entered, but none could meet all requirements. A summary of the required tasks and of the teams of participants is provided., Held Agra, India 10-15 Mar 2008. Organised by National Aerospace Laboratories, Aerial Delivery Research & Development Establishment, and U.S. Army RDECOM (International Technology Center - Pacific). more...
- Published
- 2008
47. ATC-Wake: Integrated Wake Vortex Safety and Capacity System
- Author
-
National Aerospace Laboratory - NLR, EUROCONTROL Experimental Centre - EEC, Thales Air Defence - TAD, Thales Avionics - TAV, UCL - FSA/MECA - Département de mécanique, Speiker, L.J.P., Vidal, A., Barbaresco, F., Frech, M., Barny, H., Winckelmans, Grégoire, National Aerospace Laboratory - NLR, EUROCONTROL Experimental Centre - EEC, Thales Air Defence - TAD, Thales Avionics - TAV, UCL - FSA/MECA - Département de mécanique, Speiker, L.J.P., Vidal, A., Barbaresco, F., Frech, M., Barny, H., and Winckelmans, Grégoire more...
- Published
- 2007
48. Evaluation of Collective Training in a Distributed Simulation Exercise
- Author
-
NATIONAL AEROSPACE LAB AMSTERDAM (NETHERLANDS), Lemmers, Arjan J., Rollesbroich, Bernd, Hartikainen, Timo, Carvajal, Francisco J., NATIONAL AEROSPACE LAB AMSTERDAM (NETHERLANDS), Lemmers, Arjan J., Rollesbroich, Bernd, Hartikainen, Timo, and Carvajal, Francisco J. more...
- Abstract
The military interest in Synthetic Environments (SEs) is beginning to change from thinking about the relevance of capability demonstrators to SEs being used to support distributed simulation exercises. Several European nations are actively promoting the use of SEs for Collective Training purposes to increase the military co-operation in Europe. In order to overcome the obstacles for use of distributed simulation exercises across Europe, it is important that a common European process, tools and standards are defined. This paper is focussing on the evaluation issues in distributed simulation exercises. It will outline the process of defining the evaluation needs, the identification of the functional and technical evaluation requirements and the definition of the Common Evaluation Framework (CEF). The CEF comprises processes, models, methods and presentation means for results presentation and distribution. Three supporting prototype tools for the CEF have been developed under the Euclid RTP11.13 programme: the Evaluation Definition Tool (EDT), the Evaluation Definition Selection Tool (EDST) and the Execution Evaluation Tool (EET). The EDT is used by the military user to define evaluation objectives and criteria. The EDST gives possibilities for searching and selecting evaluation objectives from a pool of ready-made objectives. The EET supports the user in post-processing the outputs acquired during the exercise and in the analysis and evaluation of the results and trainees., See also ADM001667. Paper presented at the RTO HFM Symposium on Advanced Technologies for Military Training, held in Genoa, Italy on 13-15 October 2003, and published in RTO-MP-HFM-101. The original document contains color images. more...
- Published
- 2004
49. Evaluating Human Interaction with Advanced Air Traffic Management Automation
- Author
-
NATIONAL AEROSPACE LAB AMSTERDAM (NETHERLANDS), Hilburn, Brian G., NATIONAL AEROSPACE LAB AMSTERDAM (NETHERLANDS), and Hilburn, Brian G.
- Abstract
The global Air Traffic Management (ATM) system represents one of the most complex human-machine systems known. As the system has evolved in step with traffic demands, automation has been increasingly called upon to augment the capacities of the human operator, namely the air traffic controller. Future generations of ATM automation seek to augment, or even replace, such human faculties as decision making and strategic control. As such, they represent some of the most ambitious attempts at automation conceivable., See also ADM001577. Presented at the RTO HFM Symposium on "The Role of Humans in Intelligent and Automated Systems", held in Warsaw, Poland, 7-9 Oct 2002. Published in RTO-MP-088. The original document contains color images. more...
- Published
- 2003
50. Analysis of Combined Convective and Film Cooling on an Existing Turbine Blade
- Author
-
NATIONAL AEROSPACE LAB EMMELOORD (NETHERLANDS), DE Wolf, Wim B., Woldendorp, Sandor, Tinga, Tiedo, NATIONAL AEROSPACE LAB EMMELOORD (NETHERLANDS), DE Wolf, Wim B., Woldendorp, Sandor, and Tinga, Tiedo more...
- Abstract
To support gas turbine operators NLR is developing capabilities for life assessment of hot engine components. As a typical example the first rotor blades of the high pressure (HP) turbine of the F-lOO-PW-220 military turbofan will be discussed. For these blades tools have been developed to derive the blade temperature history from flight data obtained from F-16 missions. The resulting relative life consumption estimate should support the Royal Netherlands Air Force in their engine maintenance activities. The present paper describes the prediction method for the blade temperature based on reverse engineering. Input data are the flight data of the engine performance parameters and the geometry of the HP turbine blades and vanes including film cooling orifices. The engine performance parameters are converted in HP turbine entry and exit conditions by the NLR Gas Turbine Simulation Program (GSP) engine model. Next a Computational Fluid dynamics (CFD) tool is used to calculate the resulting flow field and heat transfer coefficients without film cooling. An engineering method is used to predict the internal cooling and the resulting film injection temperature. The film cooling efficiency is estimated and a finite element method (FEM) for heat conduction completes the analysis tool. The method is illustrated by results obtained for the engine design point., Also see ADM001490, presented at RTO Applied Vehicle Technology Panel (AVT)Symposium held in Leon, Norway on 7-11 May 2001, The original document contains color images. more...
- Published
- 2003
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.