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Automatic Control Systems

Automatic Control Systems
If the poles lie in second quadrant, damping ratio is

less than 1
zero
1
more than 1

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Automatic Control Systems
In force current analogy, displacement x is analogous to

Charge
Electrostatic energy
Magnetic flux linkage
Voltage

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Automatic Control Systems
In root locus analysis the breakaway and break in points

None of these
lie on the real axis
Either lie on the real axis or occur in complex conjugate pairs
Always occur in complex conjugate pairs

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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.

False
True

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Automatic Control Systems
A system is highly oscillatory if

Gain margin is close to 1
Gain margin is close to 1 or phase margin is zero
Gain margin is high and phase margin is 180°
Gain margin is high

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Automatic Control Systems
DC tachogenerator can be used in

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

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