Finite-Time Sliding Mode Control of the Valve-Controlled Hydraulic System

Abstract

Rapid tracking is the most important quality for the valve-controlled servo system. Therefore, a method is presented of terminal sliding mode control for the valve-controlled systems which can make the tracking error converge to zero within finite time. Actually, the main feature of this method is the terminal function involved in the sliding surface. The nonlinear items are introduced through the terminal function to build a moving terminal sliding surface. Based on the Lyapunov stability theory, the terminal sliding mode controller is constructed, which can realize finite-time convergence of position error. And the proposed control strategy is simulated on basis of a valve-controlled system model whose command functions is sine and cosine functions. The results of simulation show that the terminal sliding mode control method is feasible and effective for valve-controlled systems.