Why open loop transfer function ?

  • Thread starter reddvoid
  • Start date
  • #1
118
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I don't understand why always we use open loop transfer function G(s)H(s) to draw the root locus.
can somebody please clarify my doubt.




Thanks in advance.
 

Answers and Replies

  • #2
12
0
because G(s)H(s) is easily available in factor form as it is obtained by simply modelling the transfer functions of individual components and multiplying them . this helps in obtaining the poles and zeroes easily as opposed to closed loop transfer function whose roots are hard to find.
 

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