Relation between open loop and unity feedback close loop response

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tina_singh
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hi!
can someone please help me with this problem...i have to match the open loop respone to the close loop unity feedback system of a control system.

what is the relation between the two?


thanx in advance
 
these are the two response..
can some one please help now...

than in advance
 
Attachments
  • Hand-drawn sketch of two sets of response curves on squared paper. Top: open loop response with three curves labelled 1, 2 and 3 rising from the origin. Bottom: close loop response with three curves labelled A, B and C, where curve C overshoots and then dips and rises again.
    SC20120810-202249.jpg
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Is line "A" or "B" meant to be straight?

If the open loop gain is high enough the cloosed loop response with unity feed back is Vout = Vin.