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Flight Simulator is important experimental equipment of the part real flight control system simulation, its performance directly relates to aircraft simulation results. With the development of modem military techniques in our country, the demands with technical level, applying range and request of simulator become higher and higher. So hydraulic simulators only driven by swing electro-hydraulic servo motor can not meet the needs, and simulation with servo electromotor is limited by the capacity of driving load, too. With this background, continuous rotary electro-hydraulic servomotor directly driving simulator and its control system are developed in this paper.According to synthesizing large number of domestic and foreign related literatures, this paper summarizes the outline of electro-hydraulic servomotor at home and abroad, also some key technology is introduces. In the meantime, this paper recommends the automatic control theory applied in electro-hydraulic position system.For accurately analyzing of control theory, with reaching on the structure of electro-hydraulic servomotor, an estimated mathematical model is given in this paper, based on this model and making use of greyer box identification theory, an exact mathematical model is built, after that, the stability and frequency response of open loop and close loop system are researched, also the influence of steady error, static error on system precision are discussed in this paper.To figure out the changing parameters and nonlinear in the system, this paper analyses the advantage and disadvantage between traditional PID controller and traditional Fuzzy controller, after studying the typical step response of position servo system, a Fuzzy-PID controller is designed. Meanwhile, amazing at the high frequency response, this paper bring in the difference forward feedback theory. At last, response of compound control strategy with Fuzzy-PID and difference forward feedback is simulated and compared with response of traditional PID strategy; the conclusion proved that compound control strategy can improve the dynamic and static properties of system.This paper designs experiment scheme, compiles the control software, completes installation and debugging. Experiments, which including the response of slope signal, triangular signal, step signal and sin signal, have been studied in different source oil press, and the results of experiments prove that continuous rotary electro-hydraulic servomotor system have good general performance.
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