fig6_23.m

来自「包含了控制理论的各种仿真程序」· M 代码 · 共 17 行

% Fig. 6.23   Feedback Control of Dynamic Systems, 4e 
%             Franklin, Powell, Emami
%

clear all;
close all;

num=1;
den=[1 2 1];
w=logspace(-2,3,100);
[re,im]=nyquist(num,den,w);
plot(re,im,re,-im);
grid;
xlabel('Re(G(s))');
ylabel('Im(G(s))');
title('Fig. 6.23 Nyquist plot');