基于逆系统原理的感应电动机滑模速度控制

Induction Motor Speed Control Based on Inverse System Theory and Sliding Mode Method

针对目前逆系统原理应用于感应电动机调速系统中时往往忽略参数不确定性的问题,从感应电动机的非线性模型出发,采用逆系统理论建立了转子电阻与负载参数不确定的感应电动机伪线性控制系统模型;提出了一种采用变指数趋近律实现的防抖动自适应滑模变结构控制方法,并将该控制方法应用于感应电动机伪线性控制系统中。仿真结果表明,基于逆系统原理的感应电动机滑模速度控制方法能够有效抑制系统参数的不确定性,提高系统的稳定性和控制精度。

For the problem that parameter uncertainty was usually neglected when inverse system theory was used in speed regulation system of induction motor, on the basis of non-linear model of induction motor, a pseudo-linear control system model of induction motor with uncertain rotor resistance and load was established by use of inverse system theory. A dithering-prevented and adaptive sliding mode variable-structure control method was proposed which was realized by use of variable exponential reaching law, and the control method was used in the pseudo-linear control system of induction motor. The simulation result showed that the control method can restrain uncertainty of system parameters and improve system stability and control accuracy.