带双模态控制器的异步电机矢量控制

Vector Control of Asynchronous Motor with Two-mode Controller

针对比例积分控制抗干扰性差和模糊滑模变结构控制存在模态抖动的问题,采用双模态控制器对异步电机矢量控制系统的转速进行控制,设计了模糊滑模变结构控制器。将模糊滑模变结构控制器与比例积分控制器相结合,得到双模态控制器并给出其阈值选取原则。仿真结果表明:该方法不仅提高了系统的抗负载干扰性,而且基本消除了模态抖动,验证了双模态控制在异步电机矢量控制系统中的可行性。

Aiming at the poor anti-interference of proportional integral( PI) control and modal chattering of fuzzy sliding mode variable structure control,a two-mode controller was proposed to control the speed of asynchronous motor vector control system,and the fuzzy sliding mode variable structure controller was designed. The fuzzy sliding mode variable structure controller was combined with PI controller. Thus,the two-mode controller was got and the selecting principle of threshold value was given. The simulation results show that this method not only increases the resistance to load disturbance of the system,but also eliminates the modal chattering nearly. The feasibility of two-mode control in the asynchronous motor vector control system is verified.