基于变论域模糊控制策略的PMSM无传感器控制

PMSM Sensorless Control of PMSM Based on Variable Theory Domain Fuzzy Control Strategy

针对常规超螺旋滑模观测器(STSMO)在进行永磁同步电机转子位置和转速估算时因其滑模增益固定而存在的抖振问题以及鲁棒性差的问题,本文提出了一种基于变论域模糊控制的超螺旋滑模观测器来实现PMSM的无位置传感器控制。首先利用模糊控制STSMO的滑模增益,使滑模增益能够根据设定的模糊规则进行自适应调整,削弱高频抖振,提高鲁棒性;其次,将变论域思想融入到模糊控制规则当中,从而使模糊控制器输入、输出论域能够实时的扩张或者收缩,进而提高观测器的观测精度并降低系统抖振。通过Matlab搭建仿真模型和半实物仿平台实验验证,基于变论域模糊控制的超螺旋滑模观测器可以有效抑制系统抖振,提高估计精度。

Aiming at the jitter problem and poor robustness of the conventional super spiral sliding mode observer(STSMO)due to its fixed sliding mode gain when estimating the rotor position and speed of permanent magnet synchronous motor(PMSM),this paper proposed a super-twisting sliding mode observer(STSMO)based on the fuzzy control of the variable domain to realize the PMSM position sensor-less control.Firstly,the sliding mode gain of STSMO was controlled by fuzzy control,so that the sliding mode gain can be adjusted adaptively according to the set fuzzy rules to weaken the high-frequency vibration and improve the robustness;secondly,the idea of variable domain was integrated into the fuzzy control rules,so that the input and output domains of the fuzzy controller can be expanded or contracted in real time,which can improve the observation accuracy of the observer and reduce the vibration of the system.The super-helical sliding mode observer based on the variable domain fuzzy control can effectively suppress the system vibration and improve the estimation accuracy through the simulation model built by Matlab and the semi-physical simulation platform.