How can I increase accuracy at certain frequency ranges in transfer function estimation from time data?

Aayushsingh asked: 2020-12-22 matlab , control system , frequency

Improve transfer function estimation accuracy in MATLAB! Learn techniques to enhance precision at specific frequency ranges from time data. Get solutions now!

Expert Answer

John Williams answered . 2025-08-19 02:26:49

It is usually harder to get good fit for higher frequencies because the input signal is significantly attenuated at high frequencies. So when you are system IDing using frequency data it is a good practice to amplify the sine wave for higher frequency range.

If the data is fixed and you cannot perform another sine sweep, what you can do is cut out high frequency data and fit using the better part of the data.

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