Stability diagram doesnt yield appropriate model order

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Derek Cooper 2022년 3월 14일

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https://kr.mathworks.com/matlabcentral/answers/1671164-stability-diagram-doesnt-yield-appropriate-model-order

댓글: Derek Cooper 2022년 3월 16일

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: