BLDCM位置伺服系统的模糊滑模控制

针对BLDCM位置伺服系统,设计了一种模糊滑模变结构控制器。滑模变结构控制具有响应速度快、控制精度高、鲁棒性强的特点,但普遍存在抖振现象。把模糊控制引入到常规滑模变结构控制中,采用模糊推理来调节开关控制的幅度,能有效的削弱滑模切换时产生的剧烈抖振,而不牺牲滑模变结构控制对系统参数摄动和外界扰动的强鲁棒性。仿真结果表明该方案在BLDCM位置伺服系统中提高了控制系统的精度和鲁棒性,使得控制性能得到了极大的改善。

Fuzzy-sliding Mode Control for BLDCM Servo System

In this paper a fuzzy sliding mode variable structure controller is designed for BLDCM servo system. Sliding mode control has speedy response, high accuracy and strong rubustness, but produces the chattering. In the design, fuzzy control is combined with sliding mode control, and fuzzy inference is used to regulate the magnitude of on-off control. The chattering bringing by sliding mode switch control can be effectively weakened, without sacrificing the strong robustness to parameter variations and external disturbance. Simulation study shows that the system possesses high accuracy and strong robustness, and develops the capability wonderfully.