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Automatic Control Systems

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

1
more than 1
zero
less than 1

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Automatic Control Systems
Which control action can never be used alone?

Derivative
Both (b) and (c)
Proportional
Integral

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Automatic Control Systems
The effect of adding poles and zeros can be determined quickly by

Nyquist plot
Nichols chart
Root locus
Bode plot

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Automatic Control Systems
M circles are symmetrical with respect to

Real and imaginary axis
M = 1 straight line and real axis
M = 1 straight line
M = 1 straight line and imaginary axis

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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
Nichols chart consists of

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

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