The development of a wavelet-based feature extraction technique specifically targeting FOD-event induced vibration signal changes in gas turbine engines is described. The technique performs wavelet analysis of accelerometer signals from specified locations on the engine and is shown to be robust in the presence of significant process and sensor noise. It is envisioned that the technique will be combined with Kalman filter thermal/health parameter estimation for FOD-event detection via information fusion from these (and perhaps other) sources. Due to the lack of high-frequency FOD-event test data in the open literature, a reduced-order turbofan structural model (ROM) was synthesized from a finite-element model modal analysis to support the investigation. In addition to providing test data for algorithm development, the ROM is used to determine the optimal sensor location for FOD-event detection. In the presence of significant noise, precise location of the FOD event in time was obtained using the developed wavelet-based feature.
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July 2007
Technical Papers
Reduced-Order Modeling and Wavelet Analysis of Turbofan Engine Structural Response due to Foreign Object Damage (FOD) Events
James A. Turso,
James A. Turso
QSS Group, Inc.
, 21000 Brookpark Road, Cleveland, OH 44135
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Charles Lawrence,
Charles Lawrence
NASA Glenn Research Center
, 21000 Brookpark Road, Cleveland, OH 44135
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Jonathan S. Litt
Jonathan S. Litt
U.S. Army Research Laboratory,
Glenn Research Center
, 21000 Brookpark Road, Cleveland, OH 44135
Search for other works by this author on:
James A. Turso
QSS Group, Inc.
, 21000 Brookpark Road, Cleveland, OH 44135
Charles Lawrence
NASA Glenn Research Center
, 21000 Brookpark Road, Cleveland, OH 44135
Jonathan S. Litt
U.S. Army Research Laboratory,
Glenn Research Center
, 21000 Brookpark Road, Cleveland, OH 44135J. Eng. Gas Turbines Power. Jul 2007, 129(3): 814-826 (13 pages)
Published Online: November 17, 2006
Article history
Received:
May 21, 2004
Revised:
November 17, 2006
Citation
Turso, J. A., Lawrence, C., and Litt, J. S. (November 17, 2006). "Reduced-Order Modeling and Wavelet Analysis of Turbofan Engine Structural Response due to Foreign Object Damage (FOD) Events." ASME. J. Eng. Gas Turbines Power. July 2007; 129(3): 814–826. https://doi.org/10.1115/1.2718230
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