Stability diagram doesnt yield appropriate model order

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Derek Cooper
Derek Cooper on 14 Mar 2022
Commented: Derek Cooper on 16 Mar 2022
Hello,
I have a frequency vector and a frequency respose function matrix, from which i am trying to generate the stability diagram and model order. However, i dont get appropriate model order on the peaks. Does anyone have a clue of what could have gone wrong?
Synthax
modalsd(frf,f,fs,'MaxModes',40,'FitMethod','lsce','FreqRange',[100 500])
Output:
BR

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