A high gain observer coupled to a sliding mode technique for electropneumatic system control

Nonlinear control laws become the most important strategies to control electropneumatic actuator. To get high accuracy and performance, we need the knowledge of all state variables. This paper focus on the design of high gain observer which estimates the unmeasured states (velocity and pressure in chamber N) from the measurements of the position and pressure in chamber P. Simulations results are presented to test the effectiveness of our high gain observer which is applied to sliding mode controller in order to control tracking position and pressure.