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Finding roots for a root locus

  1. Oct 5, 2014 #1

    In the attached image the roots are shown for the characteristic equation. I don't know how the roots were found. Anyone able to help?


    Root locus.jpg
  2. jcsd
  3. Oct 10, 2014 #2
    When drawing the root locus you need the closed loop poles. So I'd suggest looking at the closed loop G(s).
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