永磁直线同步电机扰动观测器仿真研究

永磁直线同步电机驱动系统没有机械阻尼、抗扰动性能差,为了抑制参数及负载变化对控制系统的影响,提高系统的跟踪精度,利用受控系统的反动态方程式来设计扰动观测器.将扰动观测器所产生的推力,前馈给比例-积分位置控制器增加系统的动态响应,采用了扰动观测器和比例-积分位置控制器构建了控制系统.通过仿真与没有扰动观测器的比例-积分位置控制相比较,结果表明,该控制方法抑制外部扰动效果好,有效地提高了系统控制性能的响应.

Research on Simulation of Disturbance Observer for Permanent Magnet Linear Synchronous Motor

The driven system of permanent magnet linear synchronous motor has the characteristics of zero mechanical damping and weak anti-disturbance.In order to restrain disturbance introduced by the parameter variation and external load of the PMLSM control system and to enhance the tracking accuracy of the system,disturbance observer is proposed based on the reverse dynamic equation.The observed disturbance force is fed forward for PI position control to increase the dynamic responses of the PMLSM driven system,forming the PMLSM control architecture based on a PI position control plus disturbance observer.Compared with the PI position control without any disturbance observers,simulated results show that the proposed control method can control the external disturbance effectively.It can be propitious to improve the responses of the system.