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Automatic Control Systems

Automatic Control Systems
Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.

True
False

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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
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

False
True

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Automatic Control Systems
For type 1 system the velocity lag error is

Inversely proportional to bandwidth of system
Directly proportional to gain constant
Independent of gain constant
Inversely proportional to gain constant

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

Impedance Z
Admittance Y
Conductance G
Reactance X

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Automatic Control Systems
The sensor generally used in incremental optical encoder is

Either (a) or (b)
Photodiode
LCD
LED

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