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Automatic Control Systems

Automatic Control Systems
The effect of adding poles and zeros can be determined quickly by

Nyquist plot
Nichols chart
Bode plot
Root locus

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Automatic Control Systems
The distance of poles from origin depends on

Damping ratio
Both A and B
Uqndamped natural frequency
Neither A nor B

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Automatic Control Systems
Nichols chart consists of

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

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Automatic Control Systems
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

True
False

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Automatic Control Systems
DC tachogenerator can be used in

Speed control system
Neither A nor B
Both A and B
Position control system

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Automatic Control Systems
In the field controlled motor the entire damping comes from

Motor friction and load
Back emf
Field resistance
Armature resistance

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