永磁直线同步电机二阶滑模控制仿真研究  

Simulation Research of Second Order Sliding Mode Control for Permanent-magnet Linear Synchronous Motor

作　　者：孙宜标[1] 魏秋瑾[1] 王成元[1] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110023

出　　处：《系统仿真学报》2009年第7期2037-2040,2045,共5页Journal of System Simulation

基　　金：国家自然科学基金项目(50805098);辽宁省自然科学基金项目(20052045)

摘　　要：针对机床进给系统中永磁直线同步电机在运行过程中,易受系统参数变化、负载扰动及端部效应等不确定性因素影响的特点,设计了二阶滑模速度和电流控制器。在出现参数和推力变化时,为保证动子速度严格跟踪其参考信号,同时消除磁阻作用和推力波动,分别独立选取速度和直轴电流控制的滑模量。控制律采用二阶滑模的螺旋算法,二阶滑模将不连续控制作用于变量的高阶微分上,理论上可消除抖振。仿真和实验结果表明该策略具有较强的速度跟踪性能,对负载扰动和参数变化等不确定性具有很强的鲁棒性,同时有效地削弱了抖振现象。For the characteristics of permanent-magnet linear synchronous motor in machine tool feeding system suffering from the effect of parameter variations, load disturbances, end effect and so on, the second order sliding mode speed controller and current controller were designed. In order to guarantee mover speed to track its reference signal strictly, and in order to eliminate the magnetic resistance function and the thrust fluctuation as the parameter and the thrust force changing, the speed sliding mode variable and direct current sliding mode variable were selected separately. Control law was achieved by twisting algorithm of the second order sliding mode. The discontinuous control effects on the higher differential, and eliminate the chattering phenomenon theoretically. The simulation and experimental results show that the designed strategy enables servo system to have very strong speed tracking performance, and to have very strong robustness against load disturbances and parameters variations, simultaneously attenuates chattering effectively.

关 键 词：二阶滑模控制 永磁直线同步电机 螺旋算法 抖振 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]