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Automatic Control Systems

Automatic Control Systems
Lag compensation permits a high gain at low frequencies.

True
False

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Automatic Control Systems
For type 1 system the velocity lag error is

Inversely proportional to gain constant
Directly proportional to gain constant
Inversely proportional to bandwidth of system
Independent of gain constant

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Automatic Control Systems
Nichols chart consists of

Constant magnitude loci
None of these
Constant phase angle loci
Magnitude and phase angle loci in log-magnitude versus phase diagram

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Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

True
False

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

Surface wound armature
Surface wound with stationary rotor
Either A or B
Slotted armature

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Automatic Control Systems
The poles with greater displacement from the real axis correspond to

Unbounded output
Lower frequencies of oscillations
Stable response
Higher frequencies of oscillations

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