Based On The Linear Quadratic Optimal Control Pid Parameter Optimization Method Of Pump Control Mada Heng-speed System

This paper analyses on the circumstance of the electrical-hydraulic proportion control system; combining the construction, principle of hydraulic circle of the pump-controlled motor system with electrical-hydraulic proportion control test stand, and discusses especially the question of the velocity steady control which is controlled by the pump-controlled motor system; Having set up the dynamic characteristic mathematical model of the pump displacement controlled motor system; and then the control method of the pump-controlled motor system: PID controls and LQR controls is proposed. The method to introduce two kinds of control strategy, relationship and pluses and minuses theoretically is analyzed in this paper. And then the system is simulated with MATLAB software, analyzing the respond in two control strategy with different loading steps, and the curve graph after obtaining the corresponding rotational speed of motor is obtained.In view of the result of simulation, LQR regulation is excellent to the PID control system, LQR regulation accuse as velocity steady controlling in the pump-controlled motor system is better.