Control system and method for pressure compensation of hydraulic actuator

The invention relates to the technical field of hydraulic actuators, and particularly relates to a control system and method for pressure compensation of a hydraulic actuator. The control system for pressure compensation of the hydraulic actuator comprises an oil cylinder and an actuator hydraulic station, and the actuator hydraulic station comprises a controller, a displacement sensor, a servo driver, a servo motor, a bidirectional pump and pressure sensors. According to the actuator, a position closed-loop control method and a pressure compensation closed-loop control method are combined together, the number of pressure sensors is increased to three paths, the servo motor is adopted, the servo motor is switched to a pressure compensation mode at low speed, so that the motor rotates at a low speed to output pressure which is not enough to drive the actuator to do telescopic motion, when the actuator needs to output the speed, the servo motor can reach the needed rotating speed through the rotating speed diff