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Automatic Control Systems

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

True
False

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Automatic Control Systems
Which dc servomotor requires strongest permanent magnet?

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

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Automatic Control Systems
Transport lag usually exists in

Pneumatic systems
Thermal, hydraulic and pneumatic systems
Thermal systems
Hydraulic systems and thermal systems

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

Motor friction and load
Armature resistance
Back emf
Field resistance

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Automatic Control Systems
Nichols chart consists of

Constant phase angle loci
Constant magnitude loci
None of these
Magnitude and phase angle loci in log-magnitude versus phase diagram

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Automatic Control Systems
Robotic manipulator arms mostly use

None of these
Electric motor actuator
Pneumatic actuator
Hydraulic actuator

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