机床用基于加性分解PMSM的滑模控制

Sliding mode control based on additive decomposition PMSM for machine tool

针对机床用永磁同步电机(PMSM)控制驱动系统的复杂性和控制性能易受到负载扰动、非线性干扰等因素的影响,利用加性分解理论的优点将永磁同步电机(PMSM)驱动控制系统分解为主系统和辅系统。其中,辅系统采用基于改进的滑模控制方法,在保证系统的稳定调速性和鲁棒性同时,还有效地削弱了传统速度滑模控制器特有的抖振。而主系统采用了基于电流双闭环的跟踪策略,可以更好地控制驱动系统的响应性能,提高了该方法的工程实用性。仿真实验结果表明,该结构控制提高了系统的动态性能和鲁棒性,即可用于机床电机驱动系统。

In view of the complexity and control performance of PMSM control drive system for machine tools,which was easily affected by load disturbance and nonlinear disturbance,the advantages of additive decomposition theory were used to decompose PMSM drive control system into primary system and auxiliary system.Among them,the auxiliary system adopted the improved sliding mode control method,which not only ensured the stability and robustness of the system,but also effectively weakened the chattering characteristic of the traditional speed sliding mode controller.The main system adopted the tracking strategy based on the current double closed loop,which could better control the response performance of the drive system and improve the engineering practicability of the method.The simulation results had shown that the structure control improved the dynamic performance and robustness of the system,and could be used in machine tool motor drive system.