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Automatic Control Systems

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

less than 1
1
more than 1
zero

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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
Nichols chart consists of

Constant phase angle loci
None of these
Magnitude and phase angle loci in log-magnitude versus phase diagram
Constant magnitude loci

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Automatic Control Systems
A lead compensator

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

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

Reactance X
Impedance Z
Conductance G
Admittance Y

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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 high
Gain margin is close to 1
Gain margin is close to 1 or phase margin is zero

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