摘要
针对永磁直线同步电机伺服系统存在的诸多不确定性问题,设计了模型参考离散滑模(MRDSMC)位置跟踪控制器。将伺服问题转化为调节问题,为了保证跟踪的快速性,在传统DSMC滑模面的基础上,引入遗忘因子。并采用一步延迟扰动近似来补偿未知扰动。此外,为了抑制由高频未建模动态引起的抖振,在MRDSMC设计中加入低通滤波器。仿真结果表明,该方案能有效地抑制系统未建模动特性的影响,具有很强的鲁棒跟踪性能。
This paper presents a model reference discrete-time sliding mode position tracking controller for high precision permanent magnet linear synchronous systems with many uncertainties.This approach converts servo problems to simple regulation problems, and improves classical design of sliding surface by introduced forgetting factor,which achieve the high speed of the tracking.One-step delayed disturbance approximation is employed to compensate the unknown disturbance.Moreover,in order to restrain the chattering introduced by high frequency unmodeled dynamics, a low pass filter is added the design of MRDSMC. Theoretical analysis and simulation results demonstrate that this control scheme can well suppress the influence of the unmodeled dynamics, and makes the system have good robust tracking performance.
出处
《变频器世界》
2009年第9期52-55,共4页
The World of Inverters
关键词
永磁直线同步电机
模型参考
离散滑模控制
Permanent-magnet linear servo system
Model reference
Discrete-time sliding mode control
