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Automatic Control Systems

Automatic Control Systems
In Bode plots the frequency at which two asymptotes meet is called corner frequency.

True
False

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Automatic Control Systems
In a simple on-off controller with differential gap, the magnitude of differential gap determines

Both (a) and (b)
Neither (a) nor (b)
The level of accuracy
The life of controller

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Automatic Control Systems
A system is highly oscillatory if

Gain margin is high and phase margin is 180°
Gain margin is close to 1 or phase margin is zero
Gain margin is close to 1
Gain margin is high

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Automatic Control Systems
Which control action can never be used alone?

Both (b) and (c)
Integral
Proportional
Derivative

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Automatic Control Systems
Nichols chart consists of

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

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

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

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