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Automatic Control Systems

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
Integral control action

Removes offset
May lead to oscillatory response
Both (a) and (b)
Neither (a) nor (b)

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Automatic Control Systems
M circles are symmetrical with respect to

Real and imaginary axis
M = 1 straight line and imaginary axis
M = 1 straight line and real axis
M = 1 straight line

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Automatic Control Systems
Which of the following is used to obtain output position in a position control system?

Synchro
Thermistor
Strain gauge
Load cell

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

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

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Automatic Control Systems
A lead compensator

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

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