Research on Intelligent Suspension System Based on Fuzzy Sliding Mode Control

Abstract

The dynamic modeling and control method of semi-active suspension system are studied. The four-degree-of-freedom semi-active suspension model of half car is established. The road input model, body displacement calculation model, wheel displacement calculation model, body displacement and pitch angle calculation model, and overall model is presented. The sliding mode controller and fuzzy sliding mode controller are designed respectively to control the suspension. The combination of fuzzy control and sliding mode control can reduce the vertical acceleration and the pitch Angle of the vehicle body, which indicates that the sliding mode fuzzy control method presented here can improve the ride comfort of the studied suspension more effectively.