基于模糊动态Terminal滑模的永磁同步电机控制研究

Research on Permanent Magnet Synchronous Motor Based on Fuzzy Dynamic Terminal Sliding Mode Control

针对永磁同步电机在工作过程中易受到外部干扰的问题,设计了动态Terminal滑模控制的伺服控制系统。Terminal滑模控制方法在滑动超平面的设计中引入了非线性函数,使得在滑模面上跟踪误差能够在有限时间内收敛到零。动态滑模控制方法可以消除由控制器中切换函数的不连续性引起的抖振现象。在此基础上利用模糊系统良好的逼近性能对永磁同步电机中的不确定参数和外部干扰进行估计,提出了基于模糊控制技术的动态Terminal滑模永磁同步电机控制方法,该方法可以有效降低由系统不确定上界引起的抖振现象。仿真结果表明:该控制方法具有良好的跟踪性能,对参数变化不敏感且鲁棒性好。

A dynamic terminal sliding mode control system designed as to the problem that permanent magnet syn-chronous motor （PMSM） is vulnerable to external interference in the process of operation. Nonlinear function is in- troduced into the terminal sliding mode control in the design of sliding hyper - plane, thus making the tracking error in sliding surface in the limited time converge to zero. Dynamic sliding mode control method can be used to elimi- nate the chattering phenomena caused by the discontinuity of controller switch function. Based on this, using good approximation of fuzzy system to estimate the uncertainties and external disturbances of PMSM a fuzzy technique dy- namic Terminal Sliding Mode Control method is proposed. The use of the method can effectively reduce the chatte-ring phenomena caused by upper bounds of uncertainties. Simulation result demonstrates that the system is good in tracking performance, non - sensitive to the parameter changes and of strong robustness.