An Application of Spectral Analysis to TF33-3 Engine Removal Data.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF SYSTEMS AND LOGISTICS
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The thesis investigated two areas relative to removals of TF33-3 engines number of engine removals over time follow some kind of regular pattern. That is, is there cycling present in daily, weekly, monthly or quarterly engine removal data, and, if so, at what frequencies. The second area investigated was the relationship between program activities and TF33-3 engine removals. The program activities used were sorties, flying hours and engine operating hours. Relationships were examined at various time delays between the activities and the engine removals up to 7-12 years. The mathematical tools used in analysis of the engine removal data were autocovariance, spectral analysis, and cross-covariance functions. Author
- Jet and Gas Turbine Engines