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Control Systems

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

 lag
 lag-lead
 lead
 lead-lag

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

 40.
 0.
 infinity.
 20.

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Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 2
 1
 4
 3

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Control Systems
Which of the following transfer functions represent under damped second order systems?

 4/(s² + 2s + 4)
 1/(s² + s + 1)
All of these
 2/(s² + 2s + 2)

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Control Systems
A lead compensator used for a closed loop controller has the following transfer function For such a lead compensator

 a < kb.
 a < b.
 b < a.
 a > kb.

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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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