The Analysis Of Motor Speed Control System And Control Strategy Study

This paper design a speed control system. use of variable pump and hydraulic pump motor combination of thehydraulicpower mechanism; valve-controlled hydraulic cylinders used to predictor control of pump -control system, as the displacement of variable pump control Institutions (that is, using positionto loop carry through variable-pump control, Itcomposed by the servo valve,hydraulic cylinders,proportional amplifier,in order to Control of Axial Pistion Pump), such control is through change the Oblique-angle of variable pump to control the flow of supply of hydraulic motor,in order to adjust the rotation speed.In addition, the speed sensor implementfeedback from signal of hydraulic motor speed, feedback signals and control signals in the margin,after PID controlier add to input ofbuilt-in loop position control system. Traditional PID ontrollerhas this feature that Principle simple,Robustness strong. But for some special system and high precision control system, Traditional PID ontroller can't very nice to satisfy requirement. Traditional PID ontroller may be improved,It will be achieve that Digital PID ontroller into discrete.Added special sessions will improve the defects of gain,integral and differential part. Fully utilized all parts' advantages. Better cater to the system requirements.For another,the change of every parts will affect the entire system.Addition,this system not only nonlinear,time-varyingvolatility and nonstationarity in high frequency,but many interference and inevitably will overlook some special factors forsimplified system model when we establish mathematical model of a system.So there are many uncertainties in system model.Because the above cause,PID control method limit the control system' effect. So this section will use the dynamic robust compensating method.To imptove the system performance.