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Automatic Control Systems

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

less than 1
zero
1
more than 1

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Automatic Control Systems
In Bode plots the frequency at which two asymptotes meet is called corner frequency.

True
False

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

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

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Automatic Control Systems
Bandwidth is proportional to speed of response.

True
False

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Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on

Stator
Either (a) or (b)
Rotor
Partly on stator and partly on rotor

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Automatic Control Systems
A system is highly oscillatory if

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

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