基于网络控制系统的感应电动机H_∞鲁棒控制

H_∞ robust control of induction motors based on networked control systems

为解决网络化感应电机控制中的干扰抑制问题,提出了感应电机网络化鲁棒控制模型。该模型运用直接反馈化方法将具有强非线性的感应电机数学模型线性化,然后引入具有时延的网络控制系统。通过设定最大网络时延,并运用矩阵不等式等方法,给出了系统鲁棒稳定的充分条件和状态反馈控制算法。仿真结果表明,该鲁棒控制策略动态性能优于具有时延的比例微分积分控制(PID)方法,能够对转子电阻参数摄动进行有效抑制。

Disturbances in networked induction motor control systems can seriously affect motion control. A time-delay networked control system model was developed by linearizing the strongly nonlinear induction motor model using the direct feedback linearization method in a robust control model for induction motors. Sufficient conditions for robust stability of the state feedback control algorithm based on the maximum network time-delay were developed using the linear matrix inequality method. Simulations show that the networked H∞ robust control strategy has better dynamic performance than the proportional-integral-derivative （PID） method and can effectively attenuate perturbations of the rotor resistance.