Inderscience Publishers

Simulation and experimental evaluation on a skyhook policy-based fuzzy logic control for semi-active suspension system

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This paper focuses on performance evaluation of several outer loop controller designs employed in a quarter car suspension featuring a magnetorheological fluid damper. A Magne-Ride damper was employed and its behaviour was investigated in the form of force-displacement and force-velocity characteristics. The non-linear hysteretic behaviour of the damper was modelled using a sixth order polynomial model. Force tracking control was performed to check the force tracking ability of the damper using a PI control. The governing equations of motions were formulated and integrated with skyhook control. Skyhook policy was then adapted in the development of a fuzzy logic control to enhance the ride performance. The performance of fuzzy logic control was compared with the on-off and continuous skyhook control in time domain. The results show that skyhook algorithm-based fuzzy logic control gives better performances than its counterparts.

Keywords: non-parametric techniques, force tracking, skyhook, fuzzy logic, semi-active suspension, quarter car suspension, vehicle suspension, automotive supsension, performance evaluation, controller designs, fuzzy control, force displacement, force velocity, nonlinear hysteresis, damping, polynomial models, force control, PI control

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