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SID method. Noise reduction.

Thread starter maruli
Start date Nov 8, 2003

Status: Not open for further replies.

Nov 8, 2003

maruli

Civil/Environmental

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