Curve Fitting for a Rational Polynomial Model.

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Mohammad 2023-12-19

评论： Sam Chak 2024-3-22

Dear all,

I want to find the best rational Polynomial model that can fit the data shown.

any help would be appreciated.

Data are in dB.

Mohammad 2024-3-22

I have uploaded them in the question. thanks

Sam Chak 2024-3-22

Hey @Mohammad, Is it common practice to describe the frequency response curve of a typical Linear Time-Invariant (LTI) system using elementary functions, as a way to identify the system?

sys = ss([0 1; -400 -2], [0; 1], [1 0], 0);

G = tf(sys) + tf(1, [1/0.01 1]);

bode(G, {1e-1, 1e2}), grid on

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