Research on Variable Structure Adaptive Robust Tracking Control for Electrohydraulic Servo System

Aiming at the tracking control problem of electro-hydraulic servo system with unknown parameters of the system and unknown bound of uncertainty,a design method of variable structure adaptive robust control was presented.To eliminate the influence of uncertainty on the control performances,an adaptive method was used.Consequently the goal of tracking control was obtained.The asymptotical stability of system was proved based on Lyapunov theory.The simulation result verifies the validity of the proposed method.