Control Systems
The open loop transfer function of a unity feedback system is given by G(s) = 1/(s+2)². The closed loop transfer function will have poles at

 -2,-1
 -2+j,-2-j
 -2,-2
 -2,2

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Control Systems
In the integral control of the single area system frequency error is reduced to zero. Then

  integrator output and speed changer position attain a constant value.
 integrator o/p decreases but speed changer position moves up.
 integrator o/p increases but speed changer position comes down.
 integrator o/p decreases and speed changer position comes down.

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