Research on EHA Control Strategy Used in Tank Gun

The excellent performance of the vertical servo actuator of the tank gun is an important guarantee to achieve accurate and fast attack on the target. At present, the actuator is based on the principle of conventional servo valve control. In order to meet the need of rapid response for tanks in modern war, this paper proposes to use the electro-hydraulic actuator (Referred to as EHA) to replace the original actuator to play the role of the vertical servo actuator of the tank gun. In complex combat environment, the large rotational inertia of tank guns and carrier disturbances caused by ground instability are the main factors that affect the control accuracy of the servo actuator. To solve this problem, this paper establishes the transfer function model of the system, and on the basis of the traditional three-loop control, the feedforward compensation in velocity loop and linear active disturbance rejection control (Referred to as LADRC) in position loop are superimposed to solve the velocity loop lag caused by the large inertia of the tank gun and the low control accuracy caused by tank gun carrier disturbance. Then this paper establishes the Matlab / Simulink simulation model, and the simulation results show that the feedforward control reduces the rise time of the step response by 30%, and LADRC makes anti-interference effort increase by 50% compared to PID.

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