Naslov
Identification of Modal Parameters with Morlet-Wave Integral

Autori
Tomac, Ivan ; Slavič, Janko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, prošireni sažetak, znanstveni

Skup
IMAC 41. - International Modal Analysis Conference

Mjesto i datum
Austin, Texas, SAD, 13.02.2023. - 16.02.2023

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Modal parameter ; identification ; over-determination ; Morlet-wave

Sažetak
Identifying modal parameters from short and noisy signals is a challenging task. When the modal parameters are identified from the free response, then the problem of noise in the signal becomes very important ; especially for the high frequencies where the response due to high- frequencies and damping falls below the level of noise in the signal much earlier than for the low frequencies. The Morlet wave integral is suitable for identification from such signals because its parameters can be easily adjusted to the desired time or frequency spread. The Morlet wave integral was originally proposed for identifying damping (the Morlet Wave damping identification method) as a fast and edge-effect free alternative to the Continuous Wavelet Transform (CWT), damping identification with the added advantage that it does not suffer from the edge effect as CWT. This research extends the damping identification to amplitude, phase and frequency identification. The method is tested on an experimental example comparing the results of identification with traditional methods based on the frequency- response function.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Strojarstvo, Zrakoplovstvo, raketna i svemirska tehnika

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