变参数趋近率的滑模模糊控制方法

Sliding Mode Fuzzy Control Method of Variable Parameter Approach

针对永磁同步电机传统滑模控制系统中的输出超调大、受外界因素干扰大、滑模抖振等问题,提出变参数趋近率的滑模模糊控制方法。该方法在速度环控制过程中引入模糊控制,通过模糊规则来适当地调节趋近率参数,实现变参数滑模结构控制。仿真实验结果表明,与传统滑模指数趋近率相比,本文所设计的控制方法能在电机启动和电机受到负载时增强系统抗干扰能力、降低超调量,在系统受到外部干扰时能够更快地趋于稳定值,有效地降低了滑模抖振,验证了所设计的控制方法的有效性。

Aiming at the problems in the traditional sliding mode control system of permanent magnet synchronous motor,such as output overshooting,large interference from external factors and chattering of sliding mode,a sliding mode fuzzy control method of variable parameter approach was designed.This method introduced fuzzy control in the speed loop control process,and adjusts the approach rate parameters appropriately through fuzzy rules to realize variable parameter sliding mode structure control.Simulation experimental results showed that,compared with the traditional sliding mode index near rate,the control system designed could enhance the anti-interference ability and reduce the overshoot when the motor was started and the motor was loaded,when the system was subjected to external interference,it tended to the stable value more quickly and effectively lowered the sliding mode chattering,which verified the validity of the designed control strategy.