Integrated Control of semi-active suspension and ABS based on sliding mode theory

An Integrated Controller of semi-active suspension system and Vehicle Anti-lock Braking System (ABS) using a quarter-car model and a single wheel-car braking model is built on the basis of the sliding mode control theory. The adjusting of the suspension control system aims at improving suspension performance as well as the braking force while braking. The adjusting of the ABS aims at getting the optimal sliding rate of the wheel and advancing braking performance. SIMULINK software is used to verify the effectiveness of the integrated controller in the normal driving condition and the braking condition. The simulation results show that when in normal driving condition, the Body Acceleration, the Suspension Working Space and the Dynamic Tyre Displacement were effectively inhibited, and the vehicle´s ride and comfort were significantly improved; While in braking condition, the integrated controller can not only effectively prevent the wheel being locked, significantly shortening the braking distance and braking time, but also can improve the vehicle´s comfort. The integrated sliding mode controller shows good control performance.