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Control Systems

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

 3
 5
 1
 2

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Control Systems
Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?

 1.
 0.
 3.
 2.

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

 lag
 lead-lag
 lag-lead
 lead

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Control Systems
The characteristic equation of a control system is give by s(s + 4)(s² + 2s + 1) + k(s + 1) = 0. Find the angle between the asymptotes?

 120°
 60°
 360°
 180°

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Control Systems
A unity feedback control system has forward loop transfer function as e-Ts/s(s+1). Its phase value will be zero at frequency ω1. Which of the following equations should be satisfied by ω1?

 ω1 = cot(Tω1)
 Tω1 = cot(ω1)
 Tω1 = tan(ω1)
 ω1 = tan(Tω1)

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Control Systems
The transfer functions of two compensators are given below. Which one is correct? which one is correct?

  C1 is a lag compensator and C2 i
  Both C1 and C2 are lead compensator.
  C1 is a lead compensator and C2 i
  Both C1 and C2 are lag compensator.

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