Find a transfer function from plot data

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silent
silent 2020-12-6
回答： Ameer Hamza 2020-12-6
I am looking to see if there is some way to find the transfer function from data i have of a plot.

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Ameer Hamza
Ameer Hamza 2020-12-6
The easiet option is to use the system identification app: https://www.mathworks.com/help/ident/ug/working-with-the-system-identification-tool-gui.html. It requires the system identification toolbox.
The other option is to write ODE for your transfer function and use this optimization-based method: https://www.mathworks.com/help/optim/ug/fit-differential-equation-ode.html

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