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Automatic Control Systems

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

Nyquist plot
Bode plot
Root locus
Nichols chart

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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
In force current analogue, mechanical mobility is analogous to

Conductance G
Admittance Y
Reactance X
Impedance Z

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

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

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Automatic Control Systems
The relative stability of a system is given by

Either (a) or (b)
Both phase and gain margins
Phase margin alone
Gain margin alone

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Automatic Control Systems
Nichols chart consists of

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

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