31 May 1999 CH-46 rotor head acoustic fault detection analysis
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Reductions in Navy maintenance budgets and available personnel have dictated the need to transition from time-based to 'condition-based' maintenance. Achieving this requires new enabling diagnostic technologies. Stress-wave acoustic emission technology has shown promise for the early detection of helicopter rotor head dynamic component faults. In September 1997, Honeywell Technology Center (HTC) successfully completed a three-week flight test of its rotor acoustic monitoring system (RAMS) at Patuxent River Flight Test Center. This flight test was the culmination of an ambitious 38-month, proof-of-concept effort directed at demonstrating the feasibility of detecting crack propagation in helicopter rotor components. Honeywell is presently developing a time- frequency-based real-time processing algorithm under internal research efforts to automate the fault-detection process. The focus of this paper is to overview the CH-46 flight test and system configuration and present preliminary results of the time-frequency analysis of the flight-test dataset.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeffrey N. Schoess, Jeffrey N. Schoess, Darryl Busch, Darryl Busch, Sunil Menon, Sunil Menon, "CH-46 rotor head acoustic fault detection analysis", Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); doi: 10.1117/12.349755; https://doi.org/10.1117/12.349755

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