System Identification tool "OE, tfest" question

15 Oct 2015
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Updated 15 Oct 2015
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Hi,
When I do system ID based on time domain data and frd data, I am very curious how OE or tfest deal with frd data? I know those functions use some least square methods to ID. If we only have frd data, how "OE" uses these complex number to do? Thanks.
Best regards, Haiming

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 Accepted Answer

Arkadiy Turevskiy
Arkadiy Turevskiy on 15 Oct 2015
Edited: Arkadiy Turevskiy on 15 Oct 2015

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This paper by Lennart Ljung might be helpful.It pretty much answers your question.

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Haiming Wang
Haiming Wang on 15 Oct 2015
Hi Arkadiy,
Thank you so much. This paper is very good to understand frequency domain identification. But I still have a question about your "OE" function. If I only have frd complex number data, how does "OE" use this frd data to generate input and output frequency data? Thanks.
Best regards, Haiming

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