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Automatic Control Systems

Automatic Control Systems
For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.

False
True

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

less than 1
zero
more than 1
1

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

Strain gauge
Synchro
Load cell
Thermistor

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Automatic Control Systems
Integral control action

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

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Automatic Control Systems
In root locus analysis the breakaway and break in points

None of these
Either lie on the real axis or occur in complex conjugate pairs
lie on the real axis
Always occur in complex conjugate pairs

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

Admittance Y
Impedance Z
Reactance X
Conductance G

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