User`s guide

connect
11-36
Given the matrices of the state-space model sys2
A = [ –9.0201 17.7791
–1.6943 3.2138 ];
B = [ –.5112 .5362
–.002 –1.8470];
C = [ –3.2897 2.4544
–13.5009 18.0745];
D = [–.5476 –.1410
–.6459 .2958 ];
Define the three blocks as individual LTI models.
sys1 = tf(10,[1 5],'inputname','uc')
sys2 = ss(A,B,C,D,'inputname',{'u1' 'u2'},...
'outputname',{'y1' 'y2'})
sys3 = zpk(–1,–2,2)
Next append these blocks to form the unconnected model sys.
sys = append(sys1,sys2,sys3)
This produces the block-diagonal model
sys
a =
x1 x2 x3 x4
x1 -5 0 0 0
x2 0 -9.0201 17.779 0
x3 0 -1.6943 3.2138 0
x4 0 0 0 -2
b =
uc u1 u2 ?
x1 4 0 0 0
x2 0 -0.5112 0.5362 0
x3 0 -0.002 -1.847 0
x4 0 0 0 1.4142