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TECHNICAL PAPERS

Analysis of Triaxial Vibration Data for Health Monitoring of Helicopter Gearboxes

[+] Author and Article Information
Irem Y. Tumer, Edward M. Huff

Computational Sciences Division, NASA Ames Research Center, Moffett Field, CA 94035

J. Vib. Acoust 125(1), 120-128 (Jan 06, 2003) (9 pages) doi:10.1115/1.1526130 History: Received August 01, 2001; Revised September 01, 2002; Online January 06, 2003
Copyright © 2003 by ASME
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References

Figures

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Gearbox transmission housing
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3D plot of the triaxial vibration data (TSP data, flight 1, file 4, maneuver FFLS)
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Scores: variation of the PCs in observations (TSP data, flight 1, file 4, maneuver FFLS)
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First principal component and its angles
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Power spectra in X,Y, and Z directions. TSP data, flight 1, file 4, maneuver FFLS.
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Power spectra in X,Y, and Z directions. TSF data, flight 1, file 4, maneuver FFLS.
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Power spectra in X,Y, and Z directions, TSC data, flight 1, file 4, maneuver FFLS
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Power spectra of triaxial vibration data in X,Y, and Z directions versus power spectra of scores from principal components analysis. Flight 1, file 3, maneuver hover and flight 1, file 4, maneuver FFLS.
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Change in theta angles for first principal component. All maneuvers, flights 1 and 2.
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Change in theta angles, TSP data, flights 1–8
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Change in alpha angles, TSP data, flights 1–8
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Experiment-wide PCA score vectors (the first N=512 points are shown for comparison with individual case)
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Power spectra for the experiment-wide PCA scores (Nfft=512)

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