how do I obtain a transfer function having an input and an output?

Question

my problem is the next one: I have an input signal and an output one. i need to find a transfer function in this form H(s)=1/(as^2+bs+c). my goal is to have a,b and c.

This question appears to be off-topic because it is about signals and systems and belongs on http://dsp.stackexchange.com — Paul R, Sep 22 '14 at 09:44

score 0 · Accepted Answer · answered Apr 17 '14 at 13:22

0

let W be the tf, I the input and O the output.

in laplace IW=O, then you just need to do O/I and simplify it to get the W in the form you want,even if it would be better and more general to write it in the bode form.

answered Apr 17 '14 at 13:22

user1834153

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how to do an O/I? sorry but I am a beginner in this field. – Razvan Apr 17 '14 at 16:52
just do the ratio (division) with the two signals in laplace – user1834153 Apr 19 '14 at 15:48

how do I obtain a transfer function having an input and an output?

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