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Control Systems

Control Systems
For a unity feedback control system open loop transfer function then acceleration error constant is

 20.
 infinity.
 0.
 50.

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Control Systems
Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is

 RC.
 RL.
 Any of the above.
 LC.

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Control Systems
The maximum phase lag occurs at the ------------------- of the two corner frequencies?

 arithmetic mean
None of these
 geometric mean
 either 1 or 2

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Control Systems
A second order control system has a transfer function 16/(s² + 4s + 16). Find the settling time for 2% tolerance?

 2 sec
 10 sec
 5 sec
 4 sec

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Control Systems
The open loop transfer function for unity feedback system is given by 5(1+0.1s) / (s(1+5s)(1+20s)) Find the steady state error for a step input of magnitude 10 is equal to

 5.
 zero.
 infinite.
 2.

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Control Systems
The transfer function of a phase lead compensator is given by: G(s) = (1 + 3Ts)/(1 + Ts) where T>0. What is the maximum phase shift provided by such a compensator?

 30°
 90°
 45°
 60°

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