Fuzzy Logic Control of Integrated Hydraulic Actuator Unit Using High Speed Switch Valves

This paper presents a kind of all-digital integrated hydraulic actuator unit to drive heavy load object without centralized oil tank. In order to improve the control quality of the actuation system while eliminating or reducing the disturbance, a fuzzy PWM controller is suggested. Simulations on the integrated hydraulic actuator unit are carried out to evaluate the effectiveness of the proposed control method when applied to hydraulic systems with various external disturbances encountered in real working conditions. Simulation results are discussed and some conclusions are given.