基于新型滑模控制和STSM-MRAS观测器的SPMSM转速估计研究

Research on SPMSM Speed Estimation Based on New Sliding Mode Control and STSM-MRAS Observer

针对永磁同步电机中滑模速度控制器的系统抖振问题以及传统MRAS观测器的鲁棒性和动态性能差的问题,提出了一种基于新型滑模控制器和超螺旋滑模MRAS观测器相结合的SPMSM转速估计策略。首先,在传统滑模速度控制中结合快速终端吸引子,构建新的滑模面,使设计的控制器不含切换项,有效削弱抖振。其次,在传统MRAS观测器的结构上引入超螺旋滑模算法替代PI自适应律,构建超螺旋滑模MRAS观测器,提高观测器的动态性能和鲁棒性。通过Matlab/Simulink平台搭建的模型进行仿真,验证所提估计策略具有良好的动态性能和鲁棒性。

Aiming at the problems caused by the sliding mode speed controller and the traditional MRAS observer in the PMSM,such as system chattering,poor robustness and dynamic performance,a SPMSM speed estimation strategy based on new sliding mode controller and super-twisting sliding mode MRAS observer is proposed.Firstly,the fast terminal attractor is introduced into the traditional sliding mode speed control to construct a new sliding mode surface so that the designed controller does not contain a switching term,which effectively weakens the chattering.Secondly,the super-twisting sliding mode algorithm is introduced to replace the PI adaptive law on the structure of the traditional MRAS observer,and the super-twisting sliding mode MRAS observer is constructed to improve the dynamic performance and robustness of the observer.The model built by Matlab/Simulink platform is simulated,which verifies that the proposed estimation strategy has good dynamic performance and robustness.