基于新型趋近律的永磁直线同步电动机全局滑模控制  

Global Sliding Mode Control Based on A New Reaching Law for Permanent Magnet Linear Synchronous Motor

作　　者：宫海涛 徐驰 郑如霞 赵希梅[2] GONG Hai-tao;XU Chi;ZHENG Ru-xia;ZHAO Xi-mei(Liaoning Fanshida Technology Co.,Ltd.,Shenyang 110004,China;School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]辽宁泛适达科技有限公司,沈阳110004 [2]沈阳工业大学电气工程学院,沈阳110870

出　　处：《微特电机》2021年第11期47-52,共6页Small & Special Electrical Machines

摘　　要：为减小模型参数变化、负载扰动、非线性摩擦及端部效应等因素对永磁直线同步电动机直接驱动伺服系统带来的影响,提出一种基于新型趋近律的全局滑模控制方法。设计非线性动态滑模面函数以消除滑模控制的到达阶段,确保系统状态从初始时刻起就在滑模面上运动,从而改善传统滑模控制在到达阶段不具有鲁棒性的缺陷,以实现全局滑模控制。设计了一种包含动态边界层饱和函数的新型趋近律,使得系统状态可以平稳收敛至切换面并且削弱输出抖振,传统饱和函数因边界层厚度范围为定值而导致状态轨迹无法渐近收敛到切换面的问题得以解决。实验对比了该方法和传统滑模控制,结果表明该方法具有更好的鲁棒性和跟踪性。In order to reduce the influence of model parameter variation,load disturbance,nonlinear friction and end effect on the direct drive servo system of permanent magnet linear synchronous motor(PMLSM),a global sliding mode control(GSMC)method based on a new reaching law was proposed.The nonlinear dynamic sliding surface function was designed to eliminate the arrival phase of the sliding mode control and ensure that the system state moved on the sliding mode surface from the initial time,so as to improve the defect that the traditional sliding mode control does not have robustness in the arrival phase and realize the global sliding mode control.A new reaching law with dynamic boundary layer saturation function was designed,which made the state of the system converge to the switching surface smoothly and weakened the output chattering.The problem that the state trajectory of the traditional saturation function cannot converge to the switching surface asymptotically due to the fixed boundary layer thickness was solved.The experimental results show that the proposed scheme has better robustness and tracking performance compared with the traditional sliding mode control.

关 键 词：永磁直线同步电动机 全局滑模控制 新型趋近律 抖振 

分 类 号：TM351[电气工程—电机] TM359.4