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Automatic Control Systems

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

Electrostatic energy
Magnetic flux linkage
Voltage
Charge

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Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on

Rotor
Partly on stator and partly on rotor
Stator
Either (a) or (b)

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

False
True

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

1
less than 1
More than 1
Zero

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Automatic Control Systems
Which control action can never be used alone?

Derivative
Both (b) and (c)
Integral
Proportional

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Automatic Control Systems
The distance of poles from origin depends on

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

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