摘要
无刷直流电动机的参数强耦合、高度非线性特性增加了对其速度控制的难度,针对上述特点,为提高系统控制的精度和稳定性,设计了一种模糊滑模变结构速度控制器。在传统的滑模变结构控制基础上,引入模糊控制,建立基于等效控制和切换控制的模糊系统,通过隶属度函数的变化来有效地消弱单纯滑模变结构控制所带来的"抖振"现象,而不牺牲滑模变结构控制对系统参数摄动和外界扰动的强鲁棒性以及快速性等优点。在Matlab软件上仿真结果表明控制器具有良好的控制性能和鲁棒性能。
The brushless DC motor has the characters of high non - linearity and close parameters coupling, which make its speed control difficult. Aimed at Directed to these characters, a fuzzy sliding mode changeable struc- ture controller was designed. Fuzzy control was introduced based on conventional sliding mode changeable structure control, then a fuzzy system based on equivalent control and switching control was formed, in which changeable structure control system, without sacrificing the strong robustness and rapidity under the condition of parameter varia- tion and external disturbance. The Matlab simulation shows this controller has good performance and robustness.
出处
《计算机仿真》
CSCD
北大核心
2010年第4期172-175,196,共5页
Computer Simulation
关键词
无刷直流电动机
模糊滑模变结构控制
抖振
Brushless DC motor
Fuzzy sliding mode variable structure control
Chattering
