考虑滑模抖振的永磁同步电机模糊超螺旋滑模观测器

Fuzzy super-spiral sliding mode observer for permanent magnet synchronous motor considering sliding mode buffeting

针对永磁同步电机控制系统中的传统滑模观测器在估计转子位置与转速时出现的抖振问题,设计一种基于模糊规则的超螺旋滑模观测器。该观测器利用串联高阶滑模结构特点来保证输出的连续性,以此削弱滑模控制中高频切换带来的抖振。而模糊规则的引入以解决超螺旋控制算法中边界函数的上界在实际中很难获得的问题,然后利用反证法验证所提出的模糊超螺旋滑模控制率的收敛性。最后在Matlab中搭建模型,实验结果表明所设计控制方案在满足控制精度的同时,减弱了系统抖振。

Contraposing the buffeting problem of traditional sliding mode observer in permanent magnet synchronous motor control system when estimating the rotational speed and rotor position,a super-spiral sliding mode observer based on fuzzy rules is proposed.The observer adopts series high-order sliding mode to ensure the continuity of the output,and weakens the buffeting begeted by high-frequency switching in sliding mode control.The introduction of fuzzy rules solves the problem that the upper bound of the boundary function in the super-spiral control algorithm is difficult to obtain in practice,and then the proof is used to verify the convergence of the proposed fuzzy super-spiral sliding mode control rate.Finally,the model is built in Matlab.The laboratory results demonstrate that the designed control scheme reduces the system chattering while satisfying the control accuracy.