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Control Systems

Control Systems
The optimum values of damping ratio is --------------

 0 to 2
 0.3 to 0.7
 0.3 to 5
 0.9 to 1.1

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Control Systems
The transfer function of a plant is T(s) = 5/(s+5)(s² + 5 + 1). The second order approximation of T(s) using dominant pole concept is

 1/(s² + 5 + 1)
 1/(s+1)(s+5)
 5/(s² + 5 + 1)
 5/(s+1)(s+5)

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Control Systems
The transfer function of a system is G(s) = 100/((s+1)(s+100)). For unit step input to the system the approximate settling time for 2% criterion is

 100 sec
 10 sec
 4 sec
 400 sec

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Control Systems
The steady state error due to ramp input for a type two system is equal to

 zero.
 infinite.
 non zero number.
 constant.

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Control Systems
Time response for a second order system depends on the value of τ. If τ= 0 then the system is called as

  under damped system.
  undamped system.
  critically damped system.
  over damped system.

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Control Systems
A unity feed back system has forward transfer function The range of k for the system to be stable is

 0 < k < 3900.
 0 < k < 39.
 0 < k < 390.
None of these

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