【摘要】 间接磁场定向控制(IFOC)的异步电动机控制系统性能容易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。更多还原

【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.更多还原