基于改进指数趋近律的PMLSM滑模控制  

Sliding Mode Control of Permanent Magnet Linear Synchronous Motor Based on Improved Exponential Approximation Law

作　　者：倪浩 周磊[1] 徐衍丰 马宇臣 NI Hao;ZHOU Lei;XU Yan-feng;MA Yu-chen(School of Automation,Nanjing Institute of Technology,Nanjing Jiangsu 211167,China)

机构地区：[1]南京工程学院自动化学院,江苏南京211167

出　　处：《计算机仿真》2025年第3期417-422,共6页Computer Simulation

基　　金：江苏省高等学校自然科学研究重大项目(20KJA460010)。

摘　　要：针对永磁直线同步电机滑模控制中存在趋近速度慢和抖振严重的问题,提出一种基于改进指数趋近律的速度环滑模控制方法。为了提高系统到达滑模面的趋近速度,对传统的指数趋近律进行改进,引入双变指数项;为了削弱系统抖振,改进的趋近律引入状态变量并使用饱和函数替代符号函数。仿真结果表明:与PI控制和传统滑模控制相比,基于改进指数趋近律的滑模控制在提高滑模面趋近速度的同时,有效削弱了抖振现象,使系统响应速度变快,抗负载干扰能力增强,验证了上述控制策略的正确性。Aiming at the problems of slow sliding speed and serious chattering in sliding mode control of permanent magnet linear synchronous motor,a speed loop sliding mode control method based on improved exponential reaching law is proposed.In order to improve the sliding speed of the system to reach the sliding surface,the traditional exponential reaching law is improved by introducing a double variable exponential term.In order to weaken the chattering of the system,the state variable is introduced into the improved reaching law and the saturation function is used to replace the symbol function.Simulation results show that compared with PI control and traditional sliding mode control,the sliding mode control based on improved exponential reaching law not only improves the sliding speed of the sliding surface,but also effectively weakens the chattering phenomenon,making the system response faster and enhancing the ability to resist load interference,which verifies the correctness of the above control strategy.

关 键 词：永磁直线同步电机 滑模控制 改进指数趋近律 抖振 

分 类 号：TM743[电气工程—电力系统及自动化]