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Automatic Control Systems

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

LCD
LED
Either (a) or (b)
Photodiode

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Automatic Control Systems
The permanent magnet field system of brushless dc servo- motor is generally on

Partly on stator and partly on rotor
Rotor
Stator
Either (a) or (b)

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

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

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Automatic Control Systems
M circles are symmetrical with respect to

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

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Automatic Control Systems
The distance of poles from origin depends on

Both A and B
Neither A nor B
Uqndamped natural frequency
Damping ratio

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Automatic Control Systems
Nyquist stability criterion uses open loop frequency response characteristics.

True
False

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