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System Identification Toolbox - Improve fit

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Christian Hofstetter
Christian Hofstetter on 18 Aug 2017
Edited: Walter Roberson on 5 Sep 2017
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


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Answers (1)

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


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Sharan Paramasivam Murugesan
Yes, I believe so. I would suggest upgrading to the latest release rather than just R2016b.
Christian Hofstetter
Christian Hofstetter on 28 Aug 2017
Didn't change much. Improved fit by ~3% maybe.
Greg Heath
Greg Heath on 5 Sep 2017
So why did you accept the answer?

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