1
Version 1
IE 474. Industrial Control Systems
Midterm 3, Spring 2012
Closed Book, Closed Notes
Solutions
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(33 points) 1. Find the transfer functions for the three-tank system shown in the figure below
where
H
2
,
H
3
and
Q
are deviation variables.
a)
(16 points)
H
2
/ Q
b)
(17 points)
H
3/
Q
c)
(5 points extra credit) For a unit step change in q
2
(t) determine q
3
(t)
Tip
: The transfer functions of the cascade circuit below is:
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