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Homework Help: Quick question (hopefully) on Matlab transfer functions

  1. Dec 4, 2012 #1
    1. The problem statement, all variables and given/known data

    I'm reading through the help files and came across this example:

    s = tf('s');
    H = s/(s^2 + 2*s +10);

    I understand that when using a rational expression it must be specified, s= tf('s');

    I also understand that the rational expression is entered through H=s/(s^2 + 2*s +10);

    I'm just struggling a bit with how these two expressions connect to each other. To me it looks like s/(s^2 + 2*s +10) is being saved as H, but there is no H in the first expression. Is H arbitrary? Could s/(s^2 + 2*s +10) be saved under any name or is there significance in the letter H?
  2. jcsd
  3. Dec 4, 2012 #2
    OK, think I have it...

    output, Y(s) = transfer function, H(s) x Input, U(s) so H is naming the transfer function within Matlab and this is the connection.
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