摘要
针对传统永磁同步电机(PMSM)控制系统中转速超调大以及负载扰动等问题,设计了改进指数趋近律滑模控制器。在传统指数趋近律的等速项和指数项上加了调节函数,使趋近律具有更快的收敛速度和更好的抗抖振能力。为了进一步提高精度,引入了低通滤波负载转矩观测器,将负载转矩的观测值进行前馈补偿以减少负载扰动。在MATLAB/Simulink上建立仿真模型,并与PI、传统指数趋近律、未进行前馈补偿的改进指数趋近律3种控制方法进行实验对比,仿真结果表明,基于改进滑模指数趋近律和转矩前馈补偿的控制策略相比于其他3种控制方法,在减少转速的超调不稳定、增强系统的抗负载扰动等能力上有进一步的提升。
An improved exponential reaching law sliding mode controller is designed to solve the problem of the speed overshoot and load disturbance in traditional permanent magnet synchronous motor(PMSM)control system.The adjustment function is added to the constant velocity term and exponential term of the traditional exponential reaching law,which makes the reaching law have faster convergence speed and better anti buffeting ability.In order to further improve the accuracy,a low-pass filtered load torque observer is introduced to compensate the observed value of load torque to reduce load disturbance.The simulation model is built on MATLAB/Simulink and compared with PI,traditional exponential reaching law and improved exponential reaching law without feedforward compensation.The simulation results show that compared with the other three control methods,the control strategy based on the improved sliding mode exponential reaching law and the torque feed-forward compensation has further improved the performance of reducing the overshoot instability of the speed and enhancing the anti load disturbance of the system.
作者
陈德海
陈志文
李明
赖正贵
李志远
Chen Dehai;Chen Zhiwen;Li Ming;Lai Zhenggui;Li Zhiyuan(School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 341000,China;Ganjiang Innovation Research Institute,Chinese Academy of Sciences,Ganzhou 341000,China)
出处
《国外电子测量技术》
北大核心
2023年第3期95-101,共7页
Foreign Electronic Measurement Technology
基金
国家自然科学基金(61763015)项目资助。
关键词
永磁同步电机
改进指数趋近律
滑模控制器
低通滤波负载转矩观测器
前馈补偿
permanent magnet synchronous motor
improving exponential reaching law
sliding mode controller
low pass filtered load torque observer
feedforward compensation
