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Control Systems

Control Systems
In a control system, an integrator is represented by

  s2.
 1 / s2.
  s.
  1 / s.

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Control Systems
Negative feedback in a closed loop control system

All of these
 improves disturbance rejection.
 reduces gain.
 reduces sensitivity to parameter variation.

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Control Systems
The characteristic equation has the following roots for over damped stable system?

 -2±j4
 -2,-4
 -2,-2
 -2,2

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Control Systems
With regard to filtering property, the lead compensator is

 high pass filter
 bandpass filter
 low pass filter
 band reject filter

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

 unity
 0.707
 zero
 infinite

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Control Systems
What is the open loop DC gain of a unity feedback control system having closed loop transfer function as

 4/9
 9/4
 13/4
 4/13

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