examp4_10.m

matlab的大量实例代码

g1=tf(1,[0.01,1]); g2=tf([0.17,1],[0.085,0]); g3=g1;
g4=tf([0.15,1],[0.051,0]); g5=tf(70,[0.0067,1]); g6=tf(0.21,[0.15,1]);
g7=tf(130,[1,0]); g8=0.212; g9=tf(0.1,[0.01,1])*inv(g7); g10=0.0044*g1;
gg1=feedback(g7*g6,g8); gg2=feedback(gg1*g5*g4,g9);
G=feedback(gg2*g3*g2,g10)*g1; % 总系统模型
bode(G); % 绘制 Bode 图
figure; nyquist(G) % 绘制 Nyquist 图
figure; ngrid('new'); % 绘制等 M 和等 N 曲线
nichols(G), axis([-360,0,-40,20]); % 叠印 Nichols 图