| With the development of aerospace technology and modern technique of manufacture, high precision hydraulic synchronization driving technology is urgently needed in many areas, such as metal-working equipment, metallurgical machinery, engineering machinery, aerospace driving unit and so on. So the research of closed- loop hydraulic synchronous control system is an important topic. This task researched the valve-controlled cylinder synchronous system module of experimental facility which is the important "985" construction project of Shandong university. It also discussed several controllers' application in proportion servo control system, and these controllers included traditional PID controller, fuzzy controller and fuzzy PID controller.In the paper, firstly, the math model of valve-controlled synchronous hydraulic cylinder module of experimental facility was established and analyzed. Based on this, the paper introduced the basic principle of PID controller and fuzzy controller, adopted integral apart PID and fuzzy algorithms to control the experimental system, and analyzed the simulation results. And Compared two control modles which are widely used in synchronous system. Because they had limitations respectively, at last, a FUZZY-PID control scheme for valve-controlled synchronous hydraulic cylinders was put forward. By combining fuzzy reasoning and PID control strategies, a new control algorithm was designed to solve the synchronous control problems of valve-controlled hydraulic cylinder.Simulated and experimental results in MATLAB showed that the control system based on fuzzy PID controller can achieve better control effects than that on traditional PID control in terms of adaptability and steady-state accuracy. The system holds stability and satisfied application requests. The success in debugging the fuzzy PID controller can provide favorable reference in interrelated research and experiment.
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