MR-damped Vehicle Suspension Ride Comfort Enhancement Based on an intelligent Proportional-Integral- Differential Sliding Mode Control

Abstract: This paper presents an intelligent proportional-integral- differential sliding mode control (i-PIDSMC) for semi-active vehicle suspension system integrated magnetorheological (MR) fluid damper to meliorate vehicle ride quality and stability. The proposed approach is composed of a system controller based on i-PIDSMC to computes the desired damping force. The system controller is contains two sub-components: (i) a proportional-integral-differential part for disturbance compensation, and (ii) a sliding mode part for executing disturbance estimation errors. Another controller is a continuous state controller which judges the command voltage that is needed to track the desired damping force. Dynamic model of quarter vehicle suspension system is presented and simulated using Matlab/Simulink software. The results of the proposed i-PIDSMC controlled system is compared to conventional sliding mode controller (SMC), conventional PID controller and the passive suspension system. The performance criteria are evaluated in time domain using two types of road excitation. The simulated results indicate that the proposed controller guarantee a significant improvement in vehicle ride quality and stability.