Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

When time constant T in any factor is varied, the shapes of log magnitude and phase angle curves remain the same.
A:
True
B:
False
C:
D:
Answer: A
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If then f(t) =
A:
cos θ0t
B:
sin ω0t
C:
eat cos ω0t
D:
e-at cos ω0t
Answer: D
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An electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis is
A:
synchro control transformer
B:
LVDT
C:
stepper motor
D:
tacho generator
Answer: C
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In response to a unit step input the controller output in given figure is for
A:
proportional controller
B:
proportional plus integral controller
C:
integral controller
D:
none of the above
Answer: B

The intercept on y-axis is due to proportional action and inclined line is due to integral action.

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The transfer function can be for
A:
lead compensator
B:
lag compensator
C:
either (a) or (b)
D:
neither (a) nor (b)
Answer: A

For a lead compensator and a < 1

Therefore is more than .

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