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Automatic Control Systems

Automatic Control Systems
DC tachogenerator can be used in

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

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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
For type 1 system the velocity lag error is

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

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Automatic Control Systems
A lead compensator

None of these
Speeds up the transient response
Increases the stability margin
Increases the stability margin and speeds up the transient-response.

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Automatic Control Systems
A system is highly oscillatory if

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

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Automatic Control Systems
Which of the following is open loop system?

System for controlling antirocket missiles
Aqualing
Respiratory system of animal
Wind screen wiper

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