一种新型非线性PID控制器

A new class of nonlinear PID controller

将非线性函数与简单的 PID控制器相级联 ,构成一种新型的非线性 PID控制器 ,以提高现有PID控制器的性能。新型 PID控制器的设计过程十分简单 ,只要适当构造非线性函数 ,并与原 PID控制器级联起来便可实现。数值仿真结果表明 ,所提出的 PID控制器比简单的 PID控制器具有更好的动静态性能。

AnewclassofnonlinearPIDcontrollertoenhancethe performance of the fixed PID controllerG*2isproposed.Thenonlinear PIDcontroller comprises a sector-bounded nonlinear gain in cascadewithalinearfixed2PIDcontroller, which is easily accomplished in practice by appropriately selecting the nonlinear gain function. The numerical simulation results of a second order system with stepresponseshowthesuperior performance of the nonlinear PID controller to a fixed-gain PID controller.