Application of the autoregressive method to the spectral analysis of a flow signal

Application of the autoregressive method to the spectral analysis of a flow signal Application of the autoregressive (AR) method to the spectral analysis of a turbulent-flow signal is discussed in this paper. When only a small number of samples are available because of the inherent nature of the flow or the limited memory size of the data acquisition device, the autoregressive method is more useful than the fast Fourier transform (FFT) method for spectral analysis, because its resolution is higher than the FFT method for this case. Especially, a low-frequency characteristic is much better analyzed by the autoregressive method. To illustrate the advantage of the AR method, some typical signals often encountered in practical flows are analyzed by the AR method. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Application of the autoregressive method to the spectral analysis of a flow signal

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Publisher
Springer-Verlag
Copyright
Copyright © 2001 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s003480100306
Publisher site
See Article on Publisher Site

Abstract

Application of the autoregressive (AR) method to the spectral analysis of a turbulent-flow signal is discussed in this paper. When only a small number of samples are available because of the inherent nature of the flow or the limited memory size of the data acquisition device, the autoregressive method is more useful than the fast Fourier transform (FFT) method for spectral analysis, because its resolution is higher than the FFT method for this case. Especially, a low-frequency characteristic is much better analyzed by the autoregressive method. To illustrate the advantage of the AR method, some typical signals often encountered in practical flows are analyzed by the AR method.

Journal

Experiments in FluidsSpringer Journals

Published: Dec 1, 2001

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