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Homework Help: Creating a Bode plot by analyzing a transfer function

  1. Oct 16, 2011 #1
    1. The problem statement, all variables and given/known data

    I am constructing a Bode plot from a given transfer function. I having trouble because I am unsure how to rewrite the transfer function in the proper form. What makes this transfer function particularly tricky for me, is that there is no "jω" in the numerator, just ω^2. In all the examples I've seen solved, they always use s = jω, and put the function in the proper form.

    2. Relevant equations

    H(jω) = (10ω^2) / [(jω + 10)(jω - 200)]

    3. The attempt at a solution

    Well, I know how to reduce the denominator values to their proper form, but not the numerator value...because there is no "j"... and no evidence of a j^2 because there is no negative sign in front.

    Thank you for reading!
  2. jcsd
  3. Oct 16, 2011 #2


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    Staff: Mentor

    Suppose the transfer function was negative before the "jω" was squared...
  4. Oct 17, 2011 #3


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    Staff Emeritus
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    Homework Helper

    Moderator's note: thread moved to Engineering, Comp Sci, & Technology.

    In the future, please post engineering homework problems in this forum.
  5. Oct 17, 2011 #4
    See example 3 of link below,

    http://www1.mengr.tamu.edu/aparlos/MEEN651/E17.pdf [Broken]

    the problem looks similar to yours.

    Found via Google search "Bode plot from a given transfer function examples"

    Good luck
    Last edited by a moderator: May 5, 2017
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