ex3_24.m

反馈控制系统设计与分析（matlab程序）

G=tf([2,1],[conv([1,1],[1,2]),0]);
Gc=tf([5,6],[1,0]); H=tf(1,[0.01,1]);
[S,T]=sensifcn(G,Gc,H); G1=ss(T);
Thinf=normhinf(G1.a,G1.b,G1.c,G1.d);
GM0=1/Thinf; PM0=360*asin(0.5/Thinf)/pi; 
[1-GM0, 1+GM0, -PM0, PM0]