System Identification Toolbox - Improve fit

조회 수: 3 (최근 30일)

Christian Hofstetter 2017년 8월 18일

편집: Walter Roberson 2017년 9월 5일

Hi,

I am trying to get some transfer function fit to this data using the identification app, but it doesn't give me anything better than 50% fit.

This is the command I use:

mw1 = tfest(z1,15,20,20,'Ts',Ts)

Can somebody give any hints or advice. Data is attached.

Thanks a lot

Sharan Paramasivam Murugesan 2017년 8월 21일

Which release of MATLAB are you using? Starting in R2016b, a new algorithm is used for faster and more accurate estimation.

Christian Hofstetter 2017년 8월 28일

Didn't change much. Improved fit by ~3% maybe.

Greg Heath 2017년 9월 5일

So why did you accept the answer?

Greg

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