开关磁阻电机直驱电液位置伺服系统模糊滑模控制仿真

Simulation Study on Fuzzy Sliding Mode Control for Switched Reluctance Motor Direct Drive Electro-hydraulic Position Servo System

针对开关磁阻电机(switched reluctance motor,简称SRM)直驱式电液位置伺服系统中存在严重饱和与死区非线性、时变性与时滞性等特点;采用传统PID控制器存在参数整定困难、适应能力差的问题.结合模糊控制和滑模变结构控制的特点,建立了一种模糊滑模变结构控制算法,通过模糊推理来输出控制量的变化量,从而有效地削弱了滑模切换时产生的剧烈抖振,提高了液压位置伺服系统控制精确度和稳定性.分别采用PID控制和模糊滑模控制对单位阶跃和余弦输入信号进行了仿真分析.结果表明:与传统PID控制相比,模糊滑模控制有效地减弱了死区与时滞非线性对系统的影响.系统在响应速度、控制精确度和抗干扰能力方面都有了很大改善,是一种很有用的控制方法.

The Switched Reluctance Motor（abbreviated as SRM） direct drive electro hydraulic servo system have the characteristics of saturation,dead zone serious nonlinear and time delay variability;The traditional PID controller that has the problems of parameter tuning difficulty and poor adaptability.In this paper,the characteristics of fuzzy control and sliding mode control are combined and fuzzy sliding mode control algorithm is set up.The algorithm that improves the hydraulic position servo control precision and stability by fuzzy reasoning to control the amount of output variation that effectively reduces the switching severe buffeting arising.The unit step and cosine input signals were simulated with PID control and fuzzy sliding mode control.The results show that： compared with the traditional PID control,fuzzy sliding mode control effectively reduced the impact of dead zone serious nonlinear and time delay.Response speed,control accuracy and robust capability of the system have been greatly improved.This algorithm is a very useful control method.