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Control Systems

Control Systems
Adding a pole to a system transfer function in terms of compensator represents a --------------- compensator ?

 lag-lead
 lead
 lag
 lead-lag

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Control Systems
Name test signals used in time response analysis?

  Impulse.
  Unit step.
  All of B, C, D.
  Unit ramp.

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Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 1
 4
 3
 2

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Control Systems
A transfer function has a zero at s = -1 and poles at s = -1 ± j1. The multiplier being unity, if the input is step function, the steady state response is given by

 2∠90°
 0.5∠10°
 0.5∠0°
 1∠0°

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Control Systems
The type of a control system is obtained from -------------- transfer function?

 both open loop and closed loop
 closed loop
 none of above.
 open loop

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

 zero
 0.707
 unity
 infinite

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