用时域法分析增加零极点对控制系统性能的影响

摘要

主要用时域法分析增加零极点对系统性能的影响。给出原系统的阶跃响应曲线和主要性能指标，然后在原系统闭环传递函数的基础上增加一个零点，或者增加一个极点，并不断改变零极点的位置来分析，从而得出增加零极点后对系统的性能有哪些影响。%This paper mainly analyzes the effect of increasing zeros and poles on the performance of control system by time-domain analysis. Firstly, the step response curve and main performance index of the initial system is given, and then adding a zero, or adding a pole based on the initial system closed loop transfer function, and the distance to zero or pole from the origin to analysis is changed, thus the impact on the performance of the control system is obtained though increasing the zeros and poles.