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Automatic Control Systems

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

Electrostatic energy
Charge
Voltage
Magnetic flux linkage

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Automatic Control Systems
The relative stability of a system is given by

Phase margin alone
Either (a) or (b)
Gain margin alone
Both phase and gain margins

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

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

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Automatic Control Systems
For any transfer function, the constant phase angle loci are

A family of circles
A family of straight lines
Neither (a) nor (b)
Either (a) or (b)

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Automatic Control Systems
DC tachogenerator can be used in

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

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Automatic Control Systems
A system is highly oscillatory if

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

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