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Signal Detection Theory Applied to Helicopter Transmission Diagnostic ThresholdsHelicopter Health Usage Monitoring Systems (HUMS) have potential for providing data to support increasing the service life of a dynamic mechanical component in the transmission of a helicopter. Data collected can demonstrate the HUMS condition indicator responds to a specific component fault with appropriate alert limits and minimal false alarms. Defining thresholds for specific faults requires a tradeoff between the sensitivity of the condition indicator (CI) limit to indicate damage and the number of false alarms. A method using Receiver Operating Characteristic (ROC) curves to assess CI performance was demonstrated using CI data collected from accelerometers installed on several UH60 Black Hawk and AH64 Apache helicopters and an AH64 helicopter component test stand. Results of the analysis indicate ROC curves can be used to reliably assess the performance of commercial HUMS condition indicators to detect damaged gears and bearings in a helicopter transmission.
Document ID
20090011790
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Dempsey, Paula J.
(NASA Glenn Research Center Cleveland, OH, United States)
Keller, Jonathan A.
(Army Space and Strategic Defense Command Redstone Arsenal, AL, United States)
Wade, Daniel R.
(Army Space and Strategic Defense Command Redstone Arsenal, AL, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2009
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
E-16530-1
Meeting Information
Meeting: AHS 65th Annual Forum and Technology Display
Location: Texas
Country: United States
Start Date: May 27, 2009
End Date: May 29, 2009
Sponsors: American Helicopter Society, Inc.
Distribution Limits
Public
Copyright
Other

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