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Automatic Control Systems

Automatic Control Systems
Integral control action

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

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Automatic Control Systems
Nichol’s chart is symmetric about – 180° axis.

False
True

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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.

True
False

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Automatic Control Systems
For type 1 system the velocity lag error is

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

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

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

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Automatic Control Systems
In the field controlled motor the entire damping comes from

Field resistance
Back emf
Armature resistance
Motor friction and load

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