Research On The Control Performance Of Continuous Rotary Electro-hydraulic Servo Motors With Large Displacement

As an important experiment equipment for the simulation for the fight control system, the performance of flight simulation turntable play an important part for the fidelity of the aircraft simulation results. With the development of China's modern military technology and the austerity of the international situation, it asks for a higher level of the flight simulation turntable technology. and the simulation turntable that only with electro-hydraulic servo motor drive can't meet the requirement any more, so the performance of a new large displacement continuous rotary electro-hydraulic servo motor and its control system is studied in this paper.After a lot of the domestic and foreign literatures were reviewed, the development of simulation turntable was summarized and some key technology is introduced. According to the requirements of super-low speed, high frequency and wide speed performance indexes for the simulation turntable, the structure model of the large displacement continuous rotary electro-hydraulic servo motor was analysed. Results show that the revolution, flow and the theoretical output torque can be realized without pulsation which is necessary for the super-low speed performance for the motor.Considering to the characteristics of the motor system, the traditional mathematical model of system is established, and then the stability of the motor, open and closed loop frequency characteristics are analyzed. The least square method is used for identification of the discrete model. After the establishment of ARX mode for the discrete system, factors that impact the performance of motor are pointed out by using recognition model.Through the theory analysis of the continuous rotary electro-hydraulic servo motor, the verification experiment of composite control strategy is done in continuous rotary electro-hydraulic servo motor and the program is complied by C++ builder. In order to verify the performance of the motor, the tracks of step response signal, slope response signal, triangle wave signal and the sine signal are followed. The experimental results show that continuous rotary motor has a favorable comprehensive performance under composite control strategy.