基于Simulink高阶非线性控制系统相平面实现

Realization of Phase Plane for Higher Order Nonlinear Control System Based on Simulink

基于Simulink仿真环境,本文提出一种用相平面法绘制高阶非线性控制系统相轨迹图的方法。该方法首先将线性系统部分化成能观标准型,然后在Simulink环境中构造仿真结构图,就可以得到非线性高阶系统的相轨迹图形,从而将只适用于一、二阶非线性系统的相平面分析法推广应用到高阶非线线性系统中。

The paper provides a solution to draw phase locus of the higher order nonlinear control system by using the phrase plane method in Simulink.Firstly,the linear part of the system is converted to the observable canonical form.Then by using the simulation modeling structured in Simulink,the phase locus of higher order nonlinear system is obtained.This way extends the use of phase plane analysis method which is only applicable to single and two-order nonlinear system to the higher order nonlinear system.