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Automatic Control Systems

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
The sensor generally used in incremental optical encoder is

Either (a) or (b)
Photodiode
LED
LCD

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Automatic Control Systems
The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions.

False
True

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

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

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Automatic Control Systems
M circles are symmetrical with respect to

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

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

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

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