Research on Fuzzy control for the electro-hydraulic servo system

The paper introduces the theoretic analysis of the electro-hydraulic servo system, and makes certain the structure of the Fuzzy controller, input or output variable, the quantitative variable, the proportional variable and fuzzy reasoning theorem based on the manipulative experiment. The model and simulation of the system are established with Fuzzy Toolbox in MATLAB. With the results of the simulation of the displacement and velocity, the quantitative variable parameters are adjusted on-line, then the system is corrected, and finally the performance of the system reaches the optimization state. Through analysis for the experimental data, compared with conventional PID control, this Fuzzy control theory can improve the stability and dynamic characteristics of the controlled process, increases system control precision and anti-disturbance ability. It can also improve the adaptive ability to parameter´s time-variability, finally achieves the development of high effective system.