Simulation of Suspension System with Intelligent Active Force Control

This paper presents an intelligent method of Active Force Control scheme applied to the vehicle suspension system of a quarter car model with actuator dynamics. The proposed controller structure consists of three loops. Outer loop controller is used for the target force computation to reject the road disturbances. Inner force tracking loop is used to keep the actual force close to the target force. Active Force Control (AFC) feedback loop is used for the estimation of force due to disturbance and it results in robustness of the proposed control scheme. The performance of suspension system with and without AFC scheme is analyzed. Simulation results of intelligent active force control based vehicle suspension system exhibits better vibration isolation of vehicle body and high robustness than those obtained by the Fuzzy Logic Controller (FLC) without AFC.