一种新型的模糊自校正Smith控制器的设计

The Design of a New Fuzzy Auto-tuning Smith Controller

Smith控制是解决纯滞后系统控制的有效方法 ,但其对过程对象模型参数的精确要求 ,限制了其应用。本文提出了一种新型的模糊自校正 Smith控制方案 ,该方案无需知道系统的精确模型 ,采用模糊控制和 PI控制动态复合 ,从而保持了模糊控制较强的鲁棒性和 PI调节器消除静态误差的优点。仿真结果证明了模糊自校正 Smith控制器具有较快的响应速度和较强的鲁棒性。而且该方案算法简单、易于实现 。

Considering the drawback of high rigourness of Smith controller to model parameter, an available fuzzy auto-tuning Smith controller for time-delay system is proposed in the paper. Combining fuzzy control and dynamic PI adjuster, it keeps good robustness of fuzzy controller and high steady accuracy of PI adjuster. The result of simulation shows its availability and applicability for time-delay control system.