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Journal of Intelligent Material Systems and Structures
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Study on MR Semi-active Suspension System and its Road Testing

Miao Yu

Department of Optoelectronic Engineering, Chongqing University, 400044, Chongqing, China, yumiao{at}cqu.edu.cn

C. R. Liao

Department of Optoelectronic Engineering, Chongqing University, 400044, Chongqing, China

W. M. Chen

Department of Optoelectronic Engineering, Chongqing University, 400044, Chongqing, China

S. L. Huang

Department of Optoelectronic Engineering, Chongqing University, 400044, Chongqing, China

A magnetorheological (MR) damper model is established and linearized based on theory analyses and real testing. Since the mathematical model of the suspension system is nonlinear and complicated, a model-free fuzzy control algorithm is employed to design a controller for achieving vibration isolation. As a pilot study, two MR dampers are used to replace the passive ones of the front half-car. A quarter-car fuzzy intelligent controller is employed to control the two MR independent suspension systems, respectively. The performance of the MR suspension system is evaluated by road testing. The test results indicate that the vibration of the vehicle body and unsprung mass are both reduced significantly.

Key Words: MR damper • semi-active suspension • fuzzy logic control • road test

This version was published on September 1, 2006

Journal of Intelligent Material Systems and Structures, Vol. 17, No. 8-9, 801-806 (2006)
DOI: 10.1177/1045389X06057534
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