how to get transfer function (bode plot) of this time response?
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I have a time response of a pressure step (not unit), but I find it difficult for me to get a transfer function(bode plot). I was thinking FFT or bode but I think I was not in the right track....Any help?
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Star Strider
on 29 May 2016
To approximate a linear system to it, use tfest first, then bode to see how accurately you have approximated the frequency characteristics of your signal.
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Star Strider
on 30 May 2016
As with all ‘real-world’ problems, you have to experiment to get the result you want.
That the initial value of the response is negative likely indicates a response lag (phase lag), typical of inductive (electrical) or mass-displacement (mechanical) systems. That will be accounted for in your model.
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