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Control Systems

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

 0.
 20.
 40.
 infinity.

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Control Systems
A linear time invariant system, initially at rest when subjected to a unit step input gave response c(t) = te-t (t ≥ 0). The transfer function of the system is

 1/s(s+1)2
 (s+1)2/s
 s/(s+1)2
 s/(s+1)

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Control Systems
If the magnitude of G(jω)H(jω) at phase crossover frequency is 0.5. Find the gain margin of the given system?

 4
 2
 1
 0.5

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Control Systems
The phase of lead compensator of the system G ( s ) = ( s + a ) / ( s + b ) is at its maximum at:

  ab.
 √( a / b).
  a / b.
  √( ab ).

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Control Systems
For type 1 system with parabolic input, the steady state error is

 finite constant.
 indeterminate.
 infinite.
 zero.

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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
 400 sec
 4 sec
 10 sec

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