Sliding‐Mode Control of the Active Suspension System with the Dynamics of a Hydraulic Actuator

An improved model of the active suspension system is proposed. Compared with the existing model of active suspension system, the dynamics of a hydraulic actuator in the active suspension system is fully considered in the proposed model. Based on the proposed model, a sliding‐mode control method is designed to control the active suspension system. Stability proof and analysis of the closed‐loop system of the active suspension is given by using Lyapunov stability theory. At last, the reliability and feasibility of the proposed sliding‐mode control method are evaluated by computer simulation. Simulation research shows that the proposed sliding‐mode control method can obtain good control performance for the active suspension system.