Overview
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Read the articleAUTHORS
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José MARTINEZ: Doctor of Science - Research engineer, Transiciel
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Pierre GAJAN: Doctor of Science - Research engineer, Office national d'études et de recherches aérospatiales (ONERA)
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Alain STRZELECKI: Doctor of Science - Research engineer, ONERA
INTRODUCTION
The analysis of non-stationary signals requires an extension of stationary methods – and in particular of the frequency-only Fourier transform (TF) –, by introducing a temporal aspect. The theory of these methods – sliding-window Fourier analysis (FFG) and wavelet transform (TO) – is presented in a first part [AF 4 510]. The experimental applications presented here are based on fluid mechanics. They provide a concrete demonstration of the potential of these analysis tools.
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Time-frequency analysis. Wavelets
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