The principal purpose of this research was to investigate the possibility of enhancing the early detection of gear and bearing problems in helicopter gearboxes utilizing more sophisticated signal processing techniques. Additional considerations were the applicability of these improvements to routine helicopter maintenance and use as an aid for in-flight readiness. The selected research dealt with the processing of acceleration data collected from a Navy TH-1L helicopter test bed. The aircraft was strapped down with the main rotor removed for safety reasons and the tail rotor left on to load the 42 degree gearbox being investigated. The signal processing research dealt principally with the potential improvements to be gained by utilizing the complex and cosine squared cepstrum techniques. Considerable apparent gains in performance were achieved by a combination of the traditional and unique employments of these cepstral techniques. Many other signal processing features were investigated and reported as by-products of this research.
Vibration analysis for detection of bearing and gear faults within gearboxes: An innovative signal processing approach
Schwingungsanalyse zur Ermittlung der Zahnrad- und Lagerfehler in Getrieben. Neue Signalverarbeitungstechniken
1988
15 Seiten, 7 Bilder, 7 Quellen
Conference paper
English
Detection of Bearing Faults in Helicopter Gearboxes
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