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Automatic Control Systems

Automatic Control Systems
Nichol’s chart is symmetric about – 180° axis.

True
False

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Automatic Control Systems
M circles are symmetrical with respect to

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

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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
Directly proportional to gain constant
Inversely proportional to bandwidth of system

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

Conductance G
Impedance Z
Admittance Y
Reactance X

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

Charge
Voltage
Electrostatic energy
Magnetic flux linkage

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

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

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