Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

The current rating of dc tachogenerator is usually
A:
small
B:
high
C:
medium
D:
either (b) or (c)
Answer: A

Control systems require small current rating of components.

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For a quadratic factor in transfer function the phase angle is not a function of damping factor.
A:
True
B:
False
C:
D:
Answer: B

Damping ratio affects phase angle.

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For the given figure C(s)/R(s) =
A:
B:
C:
D:
Answer: B

or .

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A system has transfer function. If a sinusoidal input of frequency Ο‰ is applied the steady state output is of the form
A:
B:
K1 K2 (1 + jω/T)
C:
K1K2/jωT
D:
Answer: A

For sinusoidal input jω replaces s in the transfer function.

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A system hasFor unit step input the settling time for 2% tolerance band is
A:
1.6
B:
2.5
C:
4
D:
5
Answer: D

ΞΎΟ‰n - 0.8 and = 1.25 s. For 2% criterion, settling time = 4T = 5 seconds.

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