Exercise: Automatic Control Systems

Questions for: Automatic Control Systems

In Bode method of stability analysis, the error curve is not symmetric about corner frequency.
A:
True
B:
False
C:
D:
Answer: B

Error curve is symmetric.

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

Since positive feedback is used,

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The most commonly used devices for differencing and amplification, in control systems, are
A:
BJT amplifiers
B:
FET amplifiers
C:
operational amplifiers
D:
either (a) or (b)
Answer: C

Op-amps are commonly used due to their several advantages.

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The phase angle curve of G(jω) H(jω) can be drawn
A:
by adding the phase angle curves of individual factors
B:
by subtracting the phase angle curves of individual factors
C:
by multiplying the phase angle curves of individual factors
D:
by dividing the phase angle curves of individual factors
Answer: A

When terms are multiplied, phase angles are added.

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For the block diagram of in the given figure, the transfer function C(s)/R(s) is
A:
B:
C:
D:
Answer: B

Forward transfer function is G + H1.

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