Sliding-Mode High-Gain Observer based Position Control for an Electro-Hydraulic Actuator

Abstract

A control approach for the accurate tracking of position for an Electro-Hydraulic actuation system based on a High Gain Observer is proposed in this paper. In order to achieve accurate position tracking, full state information for feedback is required which is accomplished by using a high gain observer. A sliding mode control which is recognised as an efficient technique for robust controller design is then proposed to achieve robust position tracking in presence of both matched and mismatched disturbances. The simulation results presented show the efficacy of the proposed position control technique for the electro-hydraulic actuator.