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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
Stator
Rotor
Either (a) or (b)

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

Root locus
Bode plot
Nyquist plot
Nichols chart

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Automatic Control Systems
Integral control action

Removes offset
Neither (a) nor (b)
May lead to oscillatory response
Both (a) and (b)

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Automatic Control Systems
Robotic manipulator arms mostly use

Electric motor actuator
Hydraulic actuator
Pneumatic actuator
None of these

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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
If poles lie in first quadrant, damping ratio is

More than 1
1
less than 1
Zero

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