异步电动机间接磁场定向的二自由度鲁棒控制器-JournalofSystems.PDF

2009 年 5 月 电 工 技 术 学 报 Vol.24 No. 5 第 24 卷第 5 期 TRAN SACTION S OF CHINA ELECTROTECHNICAL SOCIETY May 2009 异步电动机间接磁场定向的二自由度鲁棒控制 器 游江 孟繁荣 罗耀华 （哈尔滨工程大学自动化学院 哈尔滨 15000 1） 摘要 间接磁场定向控制 （IFOC）的异步电动机控制系统性能容 受到转子电阻变化和外 界扰动的影响，一般的鲁棒控制在兼顾系统鲁棒稳定性和鲁棒性方面有所不足。为了解决这些 问题，研究将基于Youla 参数化的二自由度控制结构用于异步电动机的间接磁场定向控制， H∞反馈控制器用于保证反馈闭环的鲁棒稳定性和鲁棒性能，设计基于H2 优化的前馈控制器来 保证系统即使在存在模型误差的情况下，仍具有良好的鲁棒跟踪性。仿真结果表明，所设计的 二自由度控制器能够提高系统在参数变化和外界干扰下的性能。 关键词：异步电动机 间接磁场定向 矢量控制 鲁棒控制 二自由度 Youla 中图分 号：TP 13 Two-Degree-of-Freedom Robust Controller of Induction Motor With Indirect Field Oriented You J iang M eng Fanrong L uo Yaohua （Harbin Engineering University Harbin 15000 1 China ） Abstract It is well known that the system performance of an induction motor with indirect field oriented control degrades under the variation of rotor resistance and in the presence of external load disturbance, and the shortage of the conventional robust control approaches in considering robust stability and robust performance simultaneously is introduced briefly . In order to solve these problems, Youla parameterization based two-degree-of-freedom controller using robust design method is studied, the feedback controller is design using H ∞ mixed sensitivity to guarantee the robust stability and performance of feedback closed loop . The H2 optimization based feedforward controller is design to obtain the robust performance of tracking even under model error . Simulation results demonstrate that the proposed approaches can improve the system performance under plant parameter variation and external disturbance.