基于反馈线性化理论的异步电动机解耦控制

Decoupling control of asynchronous motor based on feedback linearization theory

针对异步电动机在任意两相旋转坐标系下的五阶仿射非线性系统模型,运用非线性系统的微分几何理论和方法,实现了交流异步电动机运行控制模型的完全线性化.在此基础上设计了状态反馈控制律,使得系统实现转速和磁链子系统解耦,对状态反馈控制律进行了适当简化以利于工程实现,并对线性化后的转速和磁链子系统控制器分别进行了设计.仿真结果证明,采用该方法设计的控制器可使系统具有良好的稳、动态性能,实现了异步电动机的高性能控制.

For the five-order affine nonlinear model of an asynchronous motor under the d-q rotating coordinate system, a complete linearization method was realized by differential geometry theory and method. And then the state feedback control law was designed to realize the decoupling of both rotational speed and rotor flux subsystems. The state feedback control law was simplified further in order to ensure its realization in practical engineering. The controllers of the linearized rotational speed and rotor flux subsystems were separately designed. The simulation results show that the controllers designed by the proposed method can make the system possess the good dynamic and steady performances. And the high performance control for the asynchronous motor has been realized.