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Journal of Vibration and Control, Vol. 12, No. 1, 3-24 (2006)
DOI: 10.1177/1077546306059853

Semi-active Vibration Control Schemes for Suspension Systems Using Magnetorheological Dampers

Y. Shen

Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1, y6shen{at}engmail.uwaterloo.ca

M. F. Golnaraghi

Mechatronic and Smart Material Systems, Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1

G. R. Heppler

Department of Systems Design Engineering, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1

Three semi-active control methods are investigated for use in a suspension system using a commercial magnetorheological damper. The three control methods are the limited relative displacement method, the modified skyhook method, and the modified Rakheja-Sankar method. The method of averaging has been adopted to provide an analytical platform for analyzing the performance of the different control methods. The analytical results are verified using numerical simulation, and further are used to assess the efficiency of different control methods. An experimental test bed has been developed to examine the three control methods under sinusoidal and random excitations. Both analytical and experimental results confirm that the Rakheja-Sankar control and modified skyhook control methods significantly reduce the root-mean-square response of both the acceleration and relative displacement of the sprung mass, while the limited relative displacement controller can only control the relative displacement of the suspension system.

Key Words: Magnetorheological damper • semi-active control • suspension system • averaging method


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