Sliding Mode Control Design for a Two-Stage of Electro-Hydraulic Valve

Abstract

In this paper, Sliding Mode Control (SMC) is designed for spool position control of a two stage electro--hydraulic servo valve. The mathematical models of the system are described as 7th and 3rd order transfer functions with the derivatives of the control input. In order to incorporate the derivatives of the control input into the SMC design, the system is described with disturbance/uncertainty effects The proposed SMC design approach is simulated. The simulation results show that spool position is controlled to a desired position without oscillation.