Journal of Zhejiang University SCIENCE
(ISSN 1009-3095, Monthly)
2003   Vol. 4   No. 4   p.426-432

Signal frequency based self-tuning fuzzy controller for semi-active suspension system

SUN Tao(ËïÌÎ)(Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China)
HUANG Zhen-yu(»ÆÕðÓî)(Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China)
CHEN Da-yue(³Â´óÔ¾)(Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China)
TANG Lei(ÌÀÀÚ)(Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China)

Abstract:A new kind of fuzzy control scheme, based on the identification of the signal's main frequency and the behavior of the ER damper, is proposed to control the semi-active suspension system. This method adjusts the fuzzy controller to achieve the best isolation effect by analyzing the main frequency's characters and inspecting the change of system parameters. The input of the fuzzy controller is the main frequency and the optimal damping ratio is the output. Simulation results indicated that the proposed control method is very effective in isolating the vibration.
Keywords:Semi-active suspension, ER damper, Frequency identification, Fuzzy controller

CLC Number:TP872 Document ID:A

Foundation Item:Project (No.69974024) supported by the National Natural Science Foundation of China
Author Resume:SUN Tao(ËïÌÎ),E-mail: suntao@sjtu.edu.cn

References:

[1]Foda, S. G., 2000. Fuzzy control of a quarter-car suspen-sion system. Proceedings of the 12th International Con-ference on Microelectronics, p.231-234.
[2]Gavin, H.P., Hanson, R.D. and Filisko, F.E., 1996a. Electrorheological dampers, part I: analysis and design. ASME Journal of Applied Mechanics, 63: 669-675.
[3]Gavin, H. P., Hanson, R. D. and Filisko, F. E., 1996b. Electrorheological dampers, part II: analysis and design. ASME Journal of Applied Mechanics, 63: 676-682.
[4]Lin, Y.J., Lu, Y.Q. and Padovan, J., 1993. Fuzzy logic control of vehicle suspension systems. Int. Journal of Vehicle Design, 14(5-6): 457-470.
[5]Rao, M. V. C. and Prahlad, V., 1997. A tunable fuzzy logic controller for vehicle-active suspension systems. Fuzzy sets and systems, 85: 11-21.
[6]Sunwoo, M. and Cheok, K. C., 1990a. An Application of Explicit Self-Tuning Controller to Vehicle Active Sus-pension System. Proceedings of the 29th IEEE Confer-ence on Decision and Control, (4): 2251-2257.
[7]Sunwoo, M. and Cheok, K. C., 1990b. An Application of Model Reference Adaptive Control to Active Suspension System. Proceedings of 1990 American Control Confer-ence, (2) : 1340-1348.
[8]Yoshimura, T., Kubota, H., Takei, K., Kurimoto, M. and Hino, J., 2000. Construction of an active suspen-sion system of a quarter car model using fuzzy reasoning based on single input rule modules. Int. Journal of Ve-hicle Design, 23(3-4): 297-306.


Manuscript Received: 2002 July 21

Manuscript Revised: 2002 Sept. 8

Published: 2003 Aug. 30