User`s guide

LQG Regulation
9-39
Next, compare the open- and closed-loop responses from disturbance to
thickness gap. Use
feedback to close the loop. To help specify the feedback
connection, look at the I/O names of the plant
Px and regulator Regx.
Px.inputname
ans =
'u-x'
'w-ex'
'w-ix'
Regx.outputname
ans =
'u-x'
Px.outputname
ans =
'x-gap'
'x-force'
Regx.inputname
ans =
'x-force'
This indicat es that you must connect t he first input and second output of Px to
the regulator.
clx = feedback(Px,Regx,1,2,+1) % Note: +1 for positive feedback