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Control Systems

Control Systems
Force balancing equation of a dash-pot element is (where, x = displacement)

 B d2x/dt2
None of these
 B dx/dt
 B *x

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Control Systems
Which of the following controller has sluggish response?

 both 2 and 3
 proportional controller
 derivative controller
 integral controller

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Control Systems
Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?

 S is not on root locus
 S is on root locus
 either 1 or 2
None of these

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Control Systems
For a lead compensator, the poles lie:

  on LHS.
  on origin.
  on LHS before zero.
  on RHS.

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

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

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Control Systems
The transfer function of a system is given as below, if a = 0.1, then the steady state error to unity ramp input will be

 0.49.
 0.16.
 0.35.
 0.25.

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