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SID method. Noise reduction.

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maruli

maruli

Civil/Environmental
Joined
Nov 1, 2003
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3
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I am trying to identificate the modal parameters of a sistem with 2 dof employing Modified Ibrahim Time Domain method. I need to get two significant digits accurancy and I think I am not able because of high frequency noise. If I apply fft, make 0 high frequencies, and then apply ifft to the signal, am I getting wrong modal parameters? What kind of filter should I try to apply?

Alberto, Coruña, civil engineering
 
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