Abstract

Thrust vector control (TVC) actuation system is an important part for swing angle control of the launch vehicle nozzle. In this paper, the control methods of electro-mechanical hydrostatic actuator (EMHA), a new type of actuators, are studied. The block diagram of the system is firstly introduced based on the mathematical relationships of key components. Then the PID control with multiple loops of the system is given. The simulation analysis shows that the notch filter can prove the dynamic performance of the system. Finally, the dynamic performance analysis of the system adding the saturation limits is also done. The paper shows the control algorithms of EMHA and provides theoretical support for the subsequent controller design.

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