User`s guide

connect
11-37
c =
x1 x2 x3 x4
? 2.5 0 0 0
y1 0 -3.2897 2.4544 0
y2 0 -13.501 18.075 0
? 0 0 0 -1.4142
d =
uc u1 u2 ?
? 0 0 0 0
y1 0 -0.5476 -0.141 0
y2 0 -0.6459 0.2958 0
? 0 0 0 2
Continuous-time system.
Note that the ordering of the inputs and outputs is the same as the block
ordering you chose. Unnamed inputs o r o utputs are denoted by
?.
To derive the overall block diagram model from
sys, specify the
interconnections and t he external inputs and o utputs. You need to connect
outputs 1 and 4 into input 3 (
u2), and output 3 (y2) into input 4. The
interconnection matrix
Q is therefore
Q = [3 1 –4
4 3 0];
Note that the second row of Q has been padded with a trailing zero. The block
diagram has two external inputs
uc and u1 (inputs 1 and 2 of sys), and two
external outputs
y1 and y2 (outputs 2 and 3 of sys). Accordingly, set inputs
and outputs as follows.
inputs = [1 2];
outputs = [2 3];