Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

For the given figure C(s)/R(s)
A:
K
B:
0.5 K
C:
2 K
D:
0.25 K
Answer: B

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For the block diagram of the given figure, the equation describing system dynamics is
A:
(1 + RCs) Ī”Īø0(s) = Ī”Īøi(s) + R Ī” H(s)
B:
(1 + RCs) [Ī”H(s)] = Ī”Īø(s) - Ī”Īø0(s)
C:
(1 + RCs) Ī”Īø0(s) = RĪ” H(s) - Ī” Īøi(s)
D:
(1 + RCs) Ī”Īøi(s) = Ī” H(s)[R] - Ī”Īø0(s)
Answer: A

Total input is [Ī”H (s)]R + [Ī”Qi (s)]. This input gets multiplied by to give AQ0(s).

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If G(s) H(s) = , the closed loop poles are on
A:
negative real axis
B:
jĻ‰ axis
C:
right half plane
D:
either (a) or (b)
Answer: B

Poles are at s = Ā± j 10.

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The compensator in the given figure is a
A:
lag compensator
B:
lead compensator
C:
lag-lead compensator
D:
none of the above
Answer: C

Obtain transfer function.

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The polar plot in the given figure is for the term
A:
jĻ‰T
B:
1 + jĻ‰T
C:
D:
Answer: B

For the term 1 + jĻ‰t, magnitude is 1 at Ļ‰ = 0 and infinite at Ļ‰ = āˆž.

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