ex6_4.m

matlab 程序 专用于解答多项式 和 自动控制的各类习题 从我们老师那里拿过来的 鼎力推荐

% Gc, GcG

num=100;
den=[0.1,1,0];
g=tf(num,den);
figure(1)
[x0,y0,w]=bode(g);
[x,y]=bd_asymp(g,w);
subplot(211), semilogx(w,20*log10(x0(:)),x,y)
subplot(212), semilogx(w,y0(:))
figure(2)
num1=[45.44,100];
den1=[conv([0.01136,1],[0.1,1]),0];
g1=tf(num1,den1);

[x1,y1,w1]=bode(g1);
[xx,yx]=bd_asymp(g1,w1);
subplot(211), semilogx(w1,20*log10(x1(:)),xx,yx)
subplot(212), semilogx(w1,y1(:))
%margin(g1)