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Automatic Control Systems

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

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

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

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

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Automatic Control Systems
If the poles lie in second quadrant, damping ratio is

less than 1
zero
1
more than 1

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Automatic Control Systems
In force current analogue, mechanical mobility is analogous to

Conductance G
Admittance Y
Impedance Z
Reactance X

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Automatic Control Systems
Transport lag usually exists in

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

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Automatic Control Systems
In force current analogy, displacement x is analogous to

Magnetic flux linkage
Charge
Electrostatic energy
Voltage

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