一种改进的针对线性时不变单输入单输出系统的PID控制器

本文提出了一种提高PID控制器的稳定范围和控制精度的改进方法，即通过改变PID控制器的积分项结构，并给出了二阶系统控制对象达到渐进稳定时的相关参数方程。最后采用Ziegler-Nichols参数整定法对改进后的PID控制器和常规PID控制器进行了仿真，仿真结果表明控制效果明显提高。

A Modified Pid Controller for Controllable Linear Time-Invariang Siso Systems

The objective of this study is to modify the PID controller in such a manner as to widen the stability domain of the controller and at the same time increase its accuracy. This modification has been performed by changing the length of the intergration interval of the PID controller. Using Ziegler-Nichols tuning rules, all simulation results indicate that the performance of the proposed controller is better than that of traditional PID controller.