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Control Systems

Control Systems
Settling time for 5% tolerance band is -------------

 4T.
 3T.
 2T.
 5T.

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Control Systems
Which of the following is/are the advantages of a closed loop control system?

 nether 1 nor 2.
 both 1 and 2.
 The closed loop systems are accurate.
 The closed loop systems are less affected by noise.

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Control Systems
Two identical first order systems have been cascaded non interactively. The unit step response of the systems will be

 un damped
 under damped
 Over damped
 critical damped

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Control Systems
A ramp input applied to an unity feedback system results in 5% steady state error. The type number of the system is...........?

 2
 3
 5
 1

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Control Systems
The transfer function of phase lead compensator is given by , where, T > 0, α < 0. What is the maximum phase shift provided by this compensator?

 tan-1((1 - α)/(2√α)
 sin-1((1 - α)/(1 + α)
 both 1 and 3
 cos-1((1 - α)/(1 + α)

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Control Systems
None of the poles of a linear control system lie in the right half of s plane. For a bounded input, the output of this system

  always bounded.
  tends to zero.
  none of these.
  could be unbounded.

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