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Automatic Control Systems

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

False
True

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

Photodiode
LED
Either (a) or (b)
LCD

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

Conductance G
Reactance X
Admittance Y
Impedance Z

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Automatic Control Systems
A lead compensator

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

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Automatic Control Systems
The addition of a pole to the open loop transfer function pulls the root locus

None of these
To the right
Towards right or left depending on the position of new pole
To the left and making the system more stable

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Automatic Control Systems
Nichols chart consists of

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

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