AC is a controlled object of nonlinear, multivariable and complicated coupling.Under some special condition, it is difficult to be controlled effectively by conventional control method.

• 摘要交流电机是非线性、多变量、强耦合的被控对象，在一些对控制性能要求较高的场合，传统的控制策略难以对其达到有效的控制。