巧用求分离点位置正确判断根轨迹的形状

Judging Radical Track Form by Using Separating Point

以一控制系统为例 ,分别就a取 (1 <a <9、a >9或a <1、a =9或a =1 )不同值时的根轨迹图进行了讨论 ,分析了求根轨迹的分离点对于判断根轨迹的形状所起的重要作用。

Taking a control system as an example, three radical track forms of 1<a<9, a>9, a<1 and a=1 are separately discussed and the important role of finding separating point to judge radical track form is analyzed.