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Automatic Control Systems

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
The effect of adding poles and zeros can be determined quickly by

Root locus
Nyquist plot
Nichols chart
Bode plot

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Automatic Control Systems
In the field controlled motor the entire damping comes from

Back emf
Field resistance
Motor friction and load
Armature resistance

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Automatic Control Systems
Which of the following can be used as a rotating amplifier in a control system? 1. Amplidyne 2. Separately excited dc generator 3. Synchro 4. Self excited dc generator

1 and 2
1, 2 and 3
3 and 4
All

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

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

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

Thermistor
Synchro
Strain gauge
Load cell

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