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