一种复合式变结构MRAS无速度传感器转速辨识

摘要

Based on the variable-structure sliding mode control method and the adaptive control theory,a new compound sliding mode variable-structure model reference adaptive system (MRAS) speed observer is proposed.In this method,the compound switching function is constructed according to the output errors of the rotor flux voltage model and current model,and its existence and accessibility are proved,the estimated speed is calculated by using algebraic method.That has one simulation analysis on no-load acceleration phase and load step response of the system,the results show that the proposed compound variable-structure MRAS speed observer has good dynamic performance.Experimental results show that the system is feasible and meets the control requirements,it has practical engineering value.%采用变结构滑模技术和自适应控制理论,提出一种新型复合式滑模变结构模型参考自适应系统(MRAS)无速度传感器转速观测器.该方法利用转子磁链电压和电流两个模型输出的偏差构造了复合切换函数,对其存在性和可达性给予证明,采用代数方法确定等效速度.分别对系统的空载加速运行和加载阶跃响应进行了仿真分析,结果表明所提复合式变结构MRAS速度观测器动态性能良好,实验结果表明此系统正确可行且满足控制需求,具有实用工程价值.