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Automatic Control Systems

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
Bandwidth is proportional to speed of response.

False
True

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Automatic Control Systems
Which control action can never be used alone?

Derivative
Integral
Proportional
Both (b) and (c)

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Automatic Control Systems
Which of the following is used to obtain output position in a position control system?

Synchro
Load cell
Thermistor
Strain gauge

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Automatic Control Systems
The relative stability of a system is given by

Gain margin alone
Either (a) or (b)
Both phase and gain margins
Phase margin alone

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Automatic Control Systems
M circles are symmetrical with respect to

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

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