In this paper, the mathematic models of the proportional amplifier and the electro-hydraulic proportional valve in a hydraulic control system of material piling and taking machine are built respectively by catalog and then the transfer Function of hydraulic cylinder and Load system is presented. The theory model of speed curve is put forward and several available speed curves are constructed in this thesis. Three control strategies are presented to realize the speed control and then the optimal one is selected as the control input of this system. The dynamical simulation of hydraulic system is completed. The method of dynamic simulation is adopted to find the system optimal parameter matching. The test method and steps of dynamic response is proposed at last.
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