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Control Systems

Control Systems
Resonant peak of a marginally stable system is

 0
 finite value
 infinite
 any of the above

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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

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

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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

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

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its open loop transfer function is

 (2s+2)/s²
 (2s+2)/(s+1)²
 (2s+1)/s²
 (2s+1)/(s+1)²

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Control Systems
The second order system defined by 25/(s2 + 5s + 25) is given a step input. The time taken for the output to settle with in 2 % of input is

 0.4 sec.
 1.6 sec.
 1.2 sec.
 2 sec.

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Control Systems
The unit step response of the system is 1 - e-t(1+t). Which is the system?

 stable
 critically stable
 oscillatory
 unstable

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