基于新型趋近律的PMSM模糊滑模控制

Fuzzy Sliding Mode Control of Permanent Magnet Synchronous Motor Based on New Reaching Law

针对永磁同步电机的调速系统动态品质易受参数变化、外部扰动以及摩擦力等不确定因素影响而导致伺服性能降低的问题,提出一种改进的幂次指数趋近律,对该趋近律的参数k和ε引入模糊规则控制,有效抑制传统滑模变结构控制中的固有抖振问题,提升收敛速度。为了消除系统内、外部扰动引起的控制精度问题,设计一种新型扰动观测器进行观测。仿真结果表明:该方法能够实现精确的速度控制;与传统的滑模控制相比,在保留其优势的基础上,有效降低了滑模的抖振。

Aiming at the problem that the dynamic quality of the speed regulation system of permanent magnet synchronous motor is easily affected by uncertain factors such as parameter changes,external disturbances and friction,an improved exponential reaching law was proposed.For the parameters k andεin the reaching law,fuzzy rule control was introduced to effectively suppress the inherent chat⁃tering problem in the traditional sliding mode variable structure control and improve the convergence speed.In order to eliminate the control accuracy problems caused by internal and external disturbances of the system,a new disturbance observer was designed for ob⁃servation.The simulation results show that this method can achieve accurate speed control;compared with the traditional sliding mode control,the sliding mode chattering is effectively reduced on the basis of retaining its advantages.