一种参数自适应双滑模结构MRAS永磁同步电机矢量控制方法

A Vector Control Method for MRAS Permanent Magnet Synchronous Motor With Adaptive Parameters and Double Sliding Mode Structure

针对模型参考自适应系统(MRAS)在永磁同步电机控制中存在的响应速度慢、控制精度低、对参数变化敏感等问题,提出了一种参数自适应双滑模结构的MRAS永磁同步电机矢量控制方法。将传统模型参考自适应系统中的PI速度环和PI自适应调节器用滑模结构替代,提高系统的抗干扰能力和控制精度。基于波波夫超稳定性理论设计电机参数自适应系统,对电机参数进行辨识,进而提高系统鲁棒性。为抑制抖振,引入饱和函数和随系统状态变量自适应变化的滑模增益。最后借助SIMULINK软件进行仿真实验,实验结果表明该方法提高了控制精度和响应速度,且鲁棒性强,具有一定的优越性。

Aiming at the problems of model reference adaptive system(MRAS)in the control of permanent magnet synchronous motor,such as slow response speed,low control precision and sensitive to parameter changes,a vector control method of MRAS permanent magnet synchronous motor with parameter adaptive double sliding mode structure was proposed.The PI speed loop and PI adaptive regulator in the traditional model reference adaptive system were replaced by sliding mode structure to improve the anti-jamming ability and control accuracy of the system.Based on Popov’s superstability theory,an adaptive system of motor parameters was designed to identify motor parameters and improve the robustness of the system.In order to suppress chattering,saturation function and sliding mode gain which adaptively varies with system state variables were introduced.Finally,simulation experiments were carried out by Simulink software.The experimental results show that the proposed method improves the control accuracy and response speed,and has strong robustness.