Wavelet-packet identification of dynamic systems with coloured measurement noise

Autor(es)

Paiva, Henrique Mohallem ; Harrop Galvao, Roberto Kawakami ; Elmoataz, A ; Lezoray, O ; Nouboud, F ; Mammass, D

• Tipo de documento: Artigo Científico
• Fonte: Lecture Notes in Computer Science; v. 5099, p. 2-pg., 2008-01-01.

Resumo

This paper analyses the effect of coloured noise on a recently proposed technique for linear system identification in frequency subbands using wavelet packets. For this purpose, a simulation study involving the longitudinal dynamics of a flexible aircraft model is presented. The results reveal that the wavelet-packet identification outcome is robust with respect to changes in the spectral noise features. In particular, the identified frequency response is effectively smoothed in regions with poor signal-to-noise ratio. Finally, the results are favourably compared, in terms of resonance peak identification, with those obtained by standard time-domain identification methods. (AU)

• Processo FAPESP: 06/58850-6 - Diagnóstico, prognóstico e acomodação de falhas em sistemas dinâmicos
• Beneficiário: Takashi Yoneyama
• Modalidade de apoio: Auxílio à Pesquisa - Temático