ME 475 Control Systems  Fall 94
Test #2
10/26/94
Closed book  one page of formulas/notes allowed.
1) [20] Given a closed loop transfer function
C ( s)
K
=2
,
R( s) s + 4 s + 7 + K
describe the effect
and the reason (increase , unchanged , decrease ) on
ME 475 Control Systems  Summer '97
1. [25] Find the transfer function
R(s) +
G
1

Test #1
6/9/97
C ( s)
as a ratio of simple polynomials in G's and H's.
R ( s)
+
+
G
2

+
G
3
C(s)
H
2
H
3
H
1
2. [25] Find the state variable equations and the transfer f
ME 475 Control Systems
Final Exam
Fall '94
Closed book exam  Show all of your work!
1) [10] Throughout the course, we have used approximations for %OS, peak time, and 2% settling
time.
a) What were the exact conditions under which these approximations we
ME 475 Control Systems
Final Exam
Fall '96
Closed book exam  Show all of your work!
1) [3]
Name three advantages of frequency response techniques over the root locus (for control
system analysis and design).
2) [4]
A system with 4 poles and 2 zeros would
ME 475  Summer '97
Test #2
Closed book exam  One page of notes  Show all of your work!
6/26/97
1) [15] a) Why is there more improvement in steadystate error if a PI controller is used instead of a lag
network?
b) Describe the conditions that must exis
ME 475 Control Systems  Fall 96
Test #2
11/6/96
Note  One 8 x 11 sheet of notes & formulas is allowed for the test.
1. [20] Find the transfer functions
+
C ( s)
R ( s)
as a ratio of simple polynomials in G's and H's.
N ( s) =0

G1
G3
+
G4
+
G2
H
2. [20