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中文摘要：
在基于MRAS（模型参考自适应系统）的速度辨识方法中，由于参考模型采用纯积分型转子磁链电压方程，直流偏置和积分初值累积以及定子电阻变化都导致磁链观测误差较大，进而影响速度辨识精度。提出了一种改进的MRAS方法，首先引入高通滤波器消除纯积分的影响，并采用模糊控制器在线调整其截止频率改善其动态性能；其次利用模糊控制器在线辨识并调整定子电阻，克服了定子电阻变化影响速度辨识精度的问题。仿真结果表明该方法具有较好的动静态性能以及较高的辨识精度。
英文摘要：
Because the voltage model involved pure integrator, which caused initial value and drift problems. These problems and resistance varies effected the precision of speed identification. An improved method was presented, which used high - pass filter to avoid these problems and adapted the cut - off frequency on - line to improve dynamic performance by using fuzzy controller;and then eliminated the influence of stator resistance varies by using fuzzy controller to estimate and adapt stator resistance on - line. Simulation results indicated that the method had the characteristic of good dynamic and static performance and high precision speed identification.
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