摘要
针对永磁同步电动机(PMSM)速度控制的参数摄动和外部扰动等非线性问题,结合反步控制能将复杂的非线性系统分解成不超过系统阶数子系统和滑模变结构控制无需确定参数的优点,通过选择合适的控制律和滑模面设计了一种反步滑模变结构速度控制器,同时构建一个负载转矩观测器,实时观测负载转矩变化,实现对外部扰动的非线性跟踪控制。运用Lyapunov稳定性理论对所设计的控制系统进行了稳定性分析。仿真和实验结果表明所设计的控制器对参数变化和负载扰动具有良好的跟踪能力;同时,系统的鲁棒性也得到了提升。
A new robust nonlinear speed tracking controller which is based on torque observer and backstepping sliding mode control for high-performance permanent magnet synchronous motor（PMSM） is presented.This controller can solve the nonlinear problems of PMSM such as parameter perturbation and external disturbances.The advantage of back-stepping is that it is able to decompose the complex nonlinear system into no more than order several subsystems, the advantage of sliding mode variable structure control is that it does not need the precise parameters of the system.Combination with the two method＇s advantage,we can get higher performance when we have selected the appropriate control law and sliding mode surface, at the same time a torque observer has been built which is able to realize real-time observation of load torque change and the nonlinear tracking control of motor speed.Based on the Lya- punov stability theory the stability of the system has been analyzed.Simulation and experiment results show that torque observer of the back-stpping sliding mode controller has good speed tracking performance when the load and parameter disturbances had been occured the robustness of the system has been improved too.
出处
《电力电子技术》
CSCD
北大核心
2015年第8期80-82,共3页
Power Electronics
基金
湖南省科技计划项目(2013FJ4038)~~
关键词
永磁同步电机
滑模变结构
反步控制
permanent magnet synchronous motor
sliding mode variable structure
backstepping control
