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Automatic Control Systems

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

Bode plot
Nyquist plot
Nichols chart
Root locus

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Automatic Control Systems
Nichol’s chart is symmetric about – 180° axis.

True
False

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Automatic Control Systems
In a simple on-off controller with differential gap, the magnitude of differential gap determines

Neither (a) nor (b)
Both (a) and (b)
The level of accuracy
The life of controller

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

Impedance Z
Admittance Y
Reactance X
Conductance G

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Automatic Control Systems
M circles are symmetrical with respect to

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

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Automatic Control Systems
In the field controlled motor the entire damping comes from

Back emf
Armature resistance
Field resistance
Motor friction and load

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