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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.

False
True

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

less than 1
More than 1
Zero
1

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Automatic Control Systems
The addition of a pole to the open loop transfer function pulls the root locus

To the left and making the system more stable
To the right
Towards right or left depending on the position of new pole
None of these

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Automatic Control Systems
In force current analogue, mechanical mobility is analogous to

Conductance G
Admittance Y
Impedance Z
Reactance X

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

Slotted armature
Surface wound with stationary rotor
Surface wound armature
Either A or B

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

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

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