Self tuning fuzzy PID control for hydraulic load simulator

Hydraulic systems play an important role in modern industry for the reason that hydraulic actuator systems take many advantages over other technologies. Therefore, hydraulic actuator has a wide range of application fields where controlled forces or pressures with high accuracy and fast response is the most significant demand. However, disturbances in the real working conditions make the control performance such as the stability, the frequency response and loading sensitivity decrease or go bad. This paper presents a new kind of hydraulic load simulator for conducting force control performance. A self tuning fuzzy PID controller is designed to eliminate or reduce the disturbance and improve control performance of loading system. Experimental results show that the proposed controller is feasible to apply for hydraulic systems with varied external disturbances.