Modeling and simulation for pressure and speed double closed-loop of servo direct drive pump-controlled hydraulic system based on AMESim

In order to solve the problems of pressure and flow overshoot and lag in hydraulic system, the simulation model of the system was established by AMESim based on the working principle analysis of speed-pressure hydraulic circuit of servo motor, the closed-loop control strategy of speed-pressure feedback PID of servo motor was proposed, and the simulation analysis was carried out. The Simulation results showed the PID closed-loop control strategy can realize the pressure priority control, and can accurately control the pressure and flow with the changes of the target pressure and the target speed.