PID和Fuzzy控制相结合的分段复合控制

采用常规PID控制很难实现对大滞后、非线性等难以建立精确数学模型的被控对象的良好控制.为了解决这一难题,该文针对一个非线性二阶系统设计出PID和模糊控制相结合的分段复合控制器,该控制器不需要被控对象的精确数学模型.由于在整个控制过程中的不同阶段采用不同的控制方式,既继承了常规PID控制无静差、静态稳定性好的特点,同时又兼有模糊控制适应能力强、动态性能好的优势.通过MATLAB仿真实验表明,该分段复合控制器能够满足二阶非线性被控对象的控制要求,并取得了良好的控制效果.

Staged Composite Control Combining PID and Fuzzy Control

It is hard to control the non-linear object which has large delay and difficulty in establishing exact model by using routine PID.In order to solve the problem,this paper proposes a new staged composite control method combining traditional PID and fuzzy control for a two order non-linear system,which doesn't require the controlled object accompanied with exact model.By applying different methods to varied phases,it not only is able to inherit the low error and good static stability of routine PID,but also has fuzzy control's adavntage of fully acclimatizing itself to the object.The staged composite control method can meet the requirement of the system,and get good result by MATLAB simulation.