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Automatic Control Systems

Automatic Control Systems
Integral control action

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

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

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

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Automatic Control Systems
The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions.

False
True

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

Voltage
Charge
Electrostatic energy
Magnetic flux linkage

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Automatic Control Systems
A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

None of these
The gain is increased beyond upper critical value
The gain is decreased below lower critical value
Both A and B

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Automatic Control Systems
A lead compensator

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

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