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Lin W.-B.,Far East University of Taiwan | Lin W.-B.,National Yunlin University of Science and Technology | Chen C.-A.,Automotive Research and Testing Center | Chiang H.-K.,National Yunlin University of Science and Technology
Electric Power Components and Systems | Year: 2011

This article presents a sliding mode control using a Gaussian radial basis function neural network speed control design for robust stabilization and disturbance rejection of the synchronous reluctance motor. In the conventional sliding mode control design, it is assumed that the upper boundary of parameter variations and external disturbances is known and the sign function is used. This causes high-frequency chattering and high gain. A new sliding mode controller using a Gaussian radial basis function neural network estimator is proposed for the synchronous reluctance motor. The proposed method utilizes the Lyapunov function candidate to guarantee convergence and to track the speed command of the synchronous reluctance motor asymptotically. The estimator of parameter variations and external disturbances is designed to estimate the lump unknown uncertainty value in real time. Experiments were conducted to validate the proposed method. Copyright © Taylor & Francis Group, LLC.

Lin K.-Y.,National Central University | Hwang J.-R.,National Central University | Chang J.-M.,Automotive Research and Testing Center
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering | Year: 2010

The rapid development of the vehicle industry has made reducing product development time a major concern. This study seeks to identify a suitable accelerated approach to durability analysis for motorcycle components. This investigation involves field data acquisition, laboratory road load simulation, accelerated durability testing, and fatigue life prediction. Two methods, 'strain range editing technique' and 'racetrack editing technique', were applied to edit field strain histories for accelerated durability tests. Furthermore, four methods, including the 'S-N approach with fatigue property of base metal', 'Eurocode 3 approach', 'BS 5400 approach', and 'BS 5400 approach with Gurney thickness modification', were employed to assess fatigue life. Three road types and four damage levels were also used. The results demonstrated that the 'BS 5400 approach with Gurney thickness modification' is a suitable method of assessing the durability of welded motorcycle components when the fatigue properties of critical points are not available. Both the 'strain range editing technique' and 'racetrack editing technique' can effectively edit strain histories with the expected quantity of fatigue damage, and demonstrate satisfactory agreement between the experimental data and predicted data. © Authors 2010.

Tsai C.-C.,National Chung Hsing University | Hsieh S.-M.,National Chung Hsing University | Chen C.-T.,Automotive Research and Testing Center
Journal of Intelligent and Robotic Systems: Theory and Applications | Year: 2010

This paper presents a fuzzy longitudinal control system with car-following speed ranging from 0 to 120 km/h, thereby achieving the main functions of both adaptive cruise control (ACC) and Stop&Go control. A fuzzy longitudinal controller is synthesized by inputting the difference of the actual relative distance and the safe distance obtained from the preceding vehicle, and the relative speed, and then outputting the pulse-width-modulation (PWM) signal to control the output forces of the vacuum boosters. With the use of the high-level controller from dSPACE, the fuzzy control law is easily and rapidly implemented using Matlab/Simulink for the experimental car, and the controller's parameters can be changed and updated by analyzing data based on the relative distance using Lidar, the speed of the host vehicle, the opening of the throttle and the position of the braking pedal. For the sake of safe driving, experimental results are conducted by simulating the various possible car-following conditions for the ACC and Stop&Go controllers, thereby obtaining virtually relative distances and speeds to tune the controller's parameters and ensure the safety of the controller. Several car following experiments are conducted to show that the proposed fuzzy longitudinal controller is capable of achieving the requirements of comfort and safety, and giving a satisfactory performance at high and low speed conditions. © 2010 Springer Science+Business Media B.V.

Yang F.-L.,Automotive Research and Testing Center
2015 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2015 | Year: 2015

In order to effectively resolve the environmental issues of energy consumption and the emission of exhaust, electric vehicle with green, clean and energy-saving characteristics has been developed and will become more and more popular on the road. Electric vehicle is powered by its traction battery and needs to be continually charged by coupling to the public power mains, which may result in some interference along the charging cables. To sufficiently prevent the mutual interference between electric vehicle and the power mains, the international vehicle regulation ECE R10 (rev4 & rev5) had put forth the measurement method of current harmonics on electric vehicle's charging system. Therefore, this paper refers to vehicle EMC compliant test procedures to study if the measurement result of current harmonics will be influenced by different measuring method or test duration when the electric vehicle is in REESS (Rechargeable Energy Storage System) charging mode. © 2015 IEEE.

Wen R.,Automotive Research and Testing Center
2015 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2015 | Year: 2015

This paper explored the possibility to make use of a reverberation chamber for vehicle level RF emission measurement. A chamber calibration and site attenuation evaluation method is described along with a comparison of measurement results with ALSE. The RF radiated emission test of a passenger vehicle is conducted in both reverberation chamber and ALSE respectively, and the correlation between reverberation chamber and ALSE is presented. © 2015 IEEE.

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