基于滑模观测器的永磁直线同步电机速度控制  

Speed Control of Permanent Magnet Linear Synchronous Motor Based on Sliding Mode Observer

作　　者：张亮[1] 许傲然[1] 白迪[1] 谷彩连[1] 王月志[1] 

机构地区：[1]沈阳工程学院,沈阳110136

出　　处：《微特电机》2016年第1期51-54,63,共5页Small & Special Electrical Machines

摘　　要：针对永磁直线同步电机(PMLSM)在速度跟踪控制过程中因其模型具有非线性、参数时变性以及变量间的随机耦合等特点,导致电机速度跟踪控制精度低,提出了一种滑模观测器的永磁直线同步电机反馈线性化速度跟踪控制方法。首先建立了永磁直线同步电机的非线性模型,采用非线性坐标变换以及非线性状态反馈方法将电机系统进行了解耦处理,从而得到具有独立的非线性特点的电流和速度子系统。并设计了速度跟踪控制器,对反馈线性化所需要的动子加速度以及负载扰动信号,设计了一种扩张滑模观测器对其进行有效观测。仿真实验结果表明:该控制方法能够有效提高电机的速度跟踪精度拥有较好的鲁棒性。For the low control accuracy of permanent magnet linear synchronous motor during in the speed tracking con- trol process as the model is nonlinear, parameter variability and variable random coupling characteristics, a synovial observ- er for permanent magnet linear synchronous motor feedback linearization speed-tracking control method was put forward. First the nonlinear model of permanent magnet linear synchronous motor was established, using non-linear coordinate trans- form and nonlinear state feedback to dccouple the motor system, and the independent current and speed subsystems with nonlinear characteristics were gotten. The speed tracking controller was designed, and the extended synovial observer was designed for rotor acceleration speed and load disturbance signal that feedback linearization needs. Simulation results show that the control method can greatly improve the accuracy of motor speed tracking with better robustness.

关 键 词：永磁同步直线电机 速度跟踪控制 滑模观测器 稳定性 

分 类 号：TM359.4[电气工程—电机] TM351