11 results on '"Van Sy Le"'
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2. Multi-Objective Optimization of Processing Parameters in WEDM with Stainless Steel-304 for Die-Angular Cutting
- Author
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Van Sy Le
- Subjects
die ,Mechanical Engineering ,wedm ,cnc ,TA1-2040 ,stainless steel ,Engineering (General). Civil engineering (General) ,response surface method ,electrical discharge machining - Abstract
This paper is focusing on the improvement of the accuracy of WEDM process for machining the precision-die angular stainless-steel parts. The controllable parameters are studied and analyzed by using Response Surface Method technique with respect to the responses of dimensional accuracy and surface quality. Then, these models are optimized by using the multi-objective optimization technique to realize optimal processing parameters. These optimal controllable parameters are ready for WEDM operating technicians’ use.
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- 2021
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3. Positioning and Trajectory Tracking for Caterpillar Vehicles in Unknown Environment
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Dae Hwan Kim, Choong Hwan Lee, Sang Bong Kim, Sang Kwun Jeong, Hak Kyeong Kim, Van Lanh Nguyen, and Van Sy Le
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0209 industrial biotechnology ,business.industry ,Computer science ,MIMO ,Servo control ,Robotics ,02 engineering and technology ,Simultaneous localization and mapping ,Systems modeling ,Mechatronics ,Computer Science Applications ,Extended Kalman filter ,020901 industrial engineering & automation ,Control and Systems Engineering ,Control theory ,Robustness (computer science) ,Artificial intelligence ,business - Abstract
This paper proposes positioning and trajectory tracking for Caterpillar Vehicles (CVs) in unknown environments. To do these tasks, the following are performed. Firstly, a system modeling of the Caterpillar Vehicle is presented. Secondly, solving the complicated tracking control problem in unknown environments is a challenging mission. Therefore, to guarantee the Caterpillar Vehicle system to be strong robustness against external disturbances in the unknown environments, a MIMO robust servo controller for tracking the desired trajectory is designed by using a Linear Shift Invariant Differential (LSID) operator. The CVs are able to accomplish various tasks in dangerous places where workers cannot enter. Thirdly, the positioning of the CV can be obtained using a Simultaneous Localization and Mapping (SLAM) method. This paper develops perfectly the SLAM algorithm for positioning of the CV based on laser sensor Lidar. The main advantage of this method is that it does not need to use more landmarks. Landmarks can be obtained from the unknown environment. Thus, the CV can work even in unknown environments and unsafe places. Finally, to verify the effectiveness of the proposed MIMO robust servo controller and the SLAM positioning algorithm, the experimental results are presented. The experimental results demonstrate the adequate tracking performance of the proposed MIMO robust servo controller in the unknown environment.
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- 2020
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4. Novel Steel Pipe Inspection System Based on Orthogonal Magnetizer
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Van Sy Le, Minh Hung Vu, Phan Anh Nguyen, Chau Vi Khang Ngo, Ha Trang Trinh, and Hong Quang Pham
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- 2022
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5. Mechanical Design of Drill Pipe Inspection Machine
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Quoc Anh Tran, Van Tu Duong, Hoang Long Phan, Van Sy Le, and Tan Tien Nguyen
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- 2021
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6. Kinematic Study on Generated Thrust of Bioinspired Robotic with Undulating Propulsion
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Van Hien Nguyen, Tan Tien Nguyen, Huy Hung Nguyen, Van Dong Nguyen, Van Sy Le, and Van Tu Duong
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0209 industrial biotechnology ,Fin ,Computer science ,Thrust ,02 engineering and technology ,Kinematics ,Propulsion ,Systems modeling ,021001 nanoscience & nanotechnology ,020901 industrial engineering & automation ,Control theory ,Robot ,Feedback linearization ,0210 nano-technology ,Marine engineering - Abstract
This paper presents the design and simulation evaluation of a self-contained submersion robot that mimics the actual flexible locomotion of American knifefish. First, a prototype of the bio-inspired submersion robot with a single undulating fin running along the length of the robot is developed. This undulating fin is a segmental fin comprised of sixteen fin rays that produce sinusoidal waves to propel the robot. Then, a system modeling of the robot is established to investigate the kinematics of undulating propulsion. A feedback linearization controller is employed to achieve the undulating propulsion velocity. The simulation results demonstrate that the developed prototype of the bio-inspired submersion robot can realize the desired thrust and velocity by the means of the undulating fin propulsion.
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- 2020
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7. Highly Sensitive Planar Hall Magnetoresistive Sensor for Magnetic Flux Leakage Pipeline Inspection
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Van Sy Le, Hong Quang Pham, Duy Tuan Doan, Quang Hung Tran, Quang Ngan Pham, CheolGi Kim, Bang Viet Tran, Ferial Terki, and Kunwoo Kim
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Materials science ,Magnetoresistance ,Acoustics ,Pipeline (computing) ,010401 analytical chemistry ,Magnetic flux leakage ,Giant magnetoresistance ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Magnetic field ,Pipeline transport ,Planar ,Sensitivity (control systems) ,Electrical and Electronic Engineering ,0210 nano-technology - Abstract
Magnetic flux leakage (MFL) detection is frequently used for oil and gas pipeline inspection, especially for evaluation of the integrity of pipelines. The success of the MFL technique depends on many parameters. However, a sensitive magnetic sensor is an important requirement. Therefore, magnetic field sensors based on different mechanisms have been developed and applied to the MFL technique. In this paper, we evidence for the first time the capability of an innovative device based on a planar Hall magnetoresistance sensor devoted to MFL detection. This promising prototype combines all the required qualifications such as high sensitivity, low thermal drift, and bipolar and linear responses to the magnetic field. New achievements are carried out on embedded sensors in a testing platform reflecting pipeline environments. The ultrasensitive magnetic mapping concludes to a convincing technical approach with a high potential application toward MFL inspection, especially for the detection of shallow defects appearing at near side, far side, and sub-surface of a pipe wall.
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- 2018
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8. Planar Hall sensor for quantitative measurement of pipe wall thickness reduction based on the magnetic flux density method
- Author
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Van-Tai Nguyen, Hong-Quang Pham, Azzedine Bousseksou, Thi-Thuy Truong, Trung-Kien Nguyen, S. Wane, Minh-Hung Vu, Quang-Hung Tran, Van-Sy Le, Ferial Terki, Quang-Ngan Pham, Gulli, Marie-Hélène, PetroVietnam University (PVU), Physiologie & médecine expérimentale du Cœur et des Muscles [U 1046] (PhyMedExp), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institute of Environmental Technology [Hanoi] (IET), Vietnam Academy of Science and Technology (VAST), Institute of Materials Science, Laboratoire de chimie de coordination (LCC), Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), eV-Technologies, PetroVietnam Group –PVN (project no. 12 14/ATBVMT/PVU/2020/KHCN), PetroVietnam University-PVU (project no. 406/QĐ-ĐHDK), eV-Technologies –(R&D on the development of the high-sensitivity magnetometer system), Institut de Chimie de Toulouse (ICT), 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)-Centre National de la Recherche Scientifique (CNRS), Université de Montpellier (UM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), 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), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
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Materials science ,Thickness monitoring ,education ,02 engineering and technology ,01 natural sciences ,Signal ,Ultra-highsensitivity ,Planar ,Magnetic flux density ,0202 electrical engineering, electronic engineering, information engineering ,Thermal stability ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Electrical and Electronic Engineering ,Instrumentation ,Range (particle radiation) ,Applied Mathematics ,020208 electrical & electronic engineering ,010401 analytical chemistry ,Detector ,Mechanics ,High stability ,equipment and supplies ,Condensed Matter Physics ,Planar Hall sensor ,0104 chemical sciences ,Magnetic field ,[PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Hall effect sensor ,Reduction (mathematics) ,human activities - Abstract
International audience; Quantitatively monitoring the thickness reduction of a pipe by using magnetic flux density method remains a major challenge due to the small and gradual change in magnetic flux density over a long distance along a pipe. This signal change is hindered in the background signal of a detector that has a high temperature dependence and unstable background signal. In this paper, we verify the effectiveness of magnetic flux density method in quantitatively monitoring thickness reduction through simulation and experimental verification. Experimental results show that the proportion of magnetic signal change is 1.4 mT per 10% wall loss. To support this quantitative approach, we optimise an original ultra-high-sensitivity planar Hall sensor with high thermal stability and stable background signal versus time for measurement of the magnetic field over a wide range from 0 to 50 mT. The quantitative measurements were validated on test pipes with varying thickness steps of 0.5 mm.
- Published
- 2021
- Full Text
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9. Design of a lightweight magnetizer to enable a portable circumferential magnetic flux leakage detection system
- Author
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Minh Hung Vu, Hong Quang Pham, Quang Hung Tran, Duy Tuan Doan, and Van Sy Le
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010302 applied physics ,Materials science ,Acoustics ,Magnetic flux leakage ,01 natural sciences ,Signal ,Magnetic flux ,Finite element method ,010305 fluids & plasmas ,Magnetic field ,Magnetization ,Magnet ,0103 physical sciences ,Linear motion ,Instrumentation - Abstract
We proposed a lightweight magnetizer toward the realization of a portable circumferential magnetic flux leakage (MFL) inspection tool for the detection of longitudinal defects with a linear motion between pipes and the inspection tool. The proposed magnetizer consists of four permanent magnetic poles constructing a configuration in which the like poles are separated by a θ angle ranging from 30° to 60° and the opposite poles are separated by a supplemental angle of θ. The distribution of the magnetic field generated by this magnetizer and caused by defects was studied by finite element methods as well as by experimental measurements. The results reveal that the new magnetizer has advantages of high amplitude and good uniformity of magnetic field over the state-of-the-art ones with configurations of two facing poles or quadrupole geometries. With the new magnetizer, the theoretical and experimental results show that the magnetization in the pipe increases slightly with the θ angle, but the uniformity of magnetization in the pipe and the magnetic field on the surface of pipe decrease dramatically with this angle. So, the optimum angle θ is proposed at around 30°–40°. The finite element calculation and the measurements of the MFL signal caused by artificial defects evidence the capabilities in detecting shallow longitudinal defects of the MFL inspection tool with our novel magnetizer.We proposed a lightweight magnetizer toward the realization of a portable circumferential magnetic flux leakage (MFL) inspection tool for the detection of longitudinal defects with a linear motion between pipes and the inspection tool. The proposed magnetizer consists of four permanent magnetic poles constructing a configuration in which the like poles are separated by a θ angle ranging from 30° to 60° and the opposite poles are separated by a supplemental angle of θ. The distribution of the magnetic field generated by this magnetizer and caused by defects was studied by finite element methods as well as by experimental measurements. The results reveal that the new magnetizer has advantages of high amplitude and good uniformity of magnetic field over the state-of-the-art ones with configurations of two facing poles or quadrupole geometries. With the new magnetizer, the theoretical and experimental results show that the magnetization in the pipe increases slightly with the θ angle, but the uniformity of ma...
- Published
- 2019
10. MODELING OF SINGLE POINT INCREMENTAL FORMING PROCESS FOR METAL AND POLYMERIC SHEET
- Author
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Van Sy, Le
- Subjects
coupled thermal analysis ,incremental sheet forming ,DOE ,Settore ING-IND/16 - Tecnologie e Sistemi di Lavorazione ,SPIF ,FEM simulation ,SPIF, incremental sheet forming, DOE, FEM simulation, coupled thermal analysis - Published
- 2009
11. An Integrated CAD-CAPP-CAM System for Machining Mold Die With Optimal Cutting Parameters
- Author
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Hong-Seok Park, Gyu-Bong Lee, and Van-Sy Le
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Engineering ,Machining ,business.industry ,Computer-aided manufacturing ,Process output ,Process (computing) ,Mechanical engineering ,CAD ,Response surface methodology ,Optimal control ,business ,Manufacturing engineering ,Die (integrated circuit) - Abstract
The main purpose of this paper was to integrate CAD-CAPP-CAD system with optimizing cutting parameters for machining mold die. Due to the complexity of the machining process injection mold, its optimization as well as its optimal control is difficult to perform. Optimization of the cutting process needs efficient means for determining the optimal cutting parameters in order to minimize machining time and simultaneously preserve the quality of machining surface. With the recent development in CAD/CAM software, manufacturing engineers can proceed with the process planning problems, without knowing functional relationship between process input and process output in advance. In this study, the machining simulation in CATIA is used to obtain the results as initial inputs of optimal analysis. The response surface methodology (RSM) is used to analyze the cutting parameters such as cutting speed, feedrate, radial and axial depth of cut, and machining tolerance. Then this process will be integrated into process chain system that we have developed in the previous research.
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- 2006
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