chapter5_18.m

《MATLAB在控制系统中的应用》实例程序

A=[-4.1053,6.6842,-2.3158,20;-0.5789,-0.7368,0.4632,4.2;-0.0526,-1.1579,
0.6421,1.8; 
-1.2632,-1.1228,1.0772,7.2]; 
B=[1;0.2;0.1;0.4]; C=[0,0,8,-2];D=0; 
G=ss(A,B,C,D); 
W=diag([1,2,3,4]); 
V=lyap(G.a,-W) 
[key,sdet]=posdef(V) 
key= 0 
sdet=1.0e+006* 
-0.0026 -0.2570 -1.7222 -1.6593