ANZIAM J. 46(E) ppC75--C88, 2005.
Propeller blade signatures in the wavelet domain
D. H. Smith |
Abstract
An in-flight airframe vibration data sample taken from a propeller driven cargo aircraft is viewed in the wavelet and frequency domains, with an emphasis on propeller blade activity. Close examination in the wavelet domain reveals a mechanism by which this activity is shared between adjacent resolution levels, with subsequent wavelet packet decomposition demonstrating alternatives with fewer basis functions.
Download to your computer
- Click here for the PDF article (759 kbytes) We suggest printing 2up.
- Click here for its BiBTeX record
Authors
- D. H. Smith
- DSTO Edinburgh, PO Box 1500, Edinburgh, South Australia 5111. mailto:david.h.smith@csiro.au
Published 15 March 2005, amended March 18, 2005. ISSN 1446-8735
References
- E. Oran Brigham, {The Fast Fourier Transform and its Applications}, Prentice Hall (1988).
- A. Cohen, I. Daubechies and P. Vial, Wavelets on the Interval and Fast Wavelet Transforms, Appl. Comp. Harm. Analysis, {1} p54--81 (1993).
- I. Daubechies, {10 Lectures on Wavelets}, SIAM CBMS 61 (1992).
- P. A. Farrell, C. R. Mouser, D. P. Conser and C. D. Rider, ``C-130J-30 Cargo Vibration Flight Test'', DSTO TR1310 (2002).
- M. T. Hale and R. Adhami, Operational Vibration Specification of Helicopter Stores Using Wavelet Analysis, J. of IEST {41} 5 p17--30 (1998).
- A. Jensen, A. la Cour-Harbo, {Ripples in Mathematics, The Discrete Wavelet Transform}, Springer (2001).
- F. C. Moon, {Chaotic Vibrations. An Introduction for Applied Scientists and Engineers}, Wiley-Interscience (1987).
- G. Strang and T. Nguyen, {Wavelets and Filter Banks}, Wellesley Cambridge Press (1997).