Threshold Assessment of Gear Diagnostic Tools on Flight and Test Rig Data

Published 2019-07-12 From Glenn Research Center 3 authors

Attribution

This is the abstract and citation. Full text lives at NASA NTRS — we link out rather than host. All credit to the authors and Glenn Research Center.

Abstract

Verbatim from NASA NTRS. Not paraphrased, not summarized.

A method for defining thresholds for vibration-based algorithms that provides the minimum number of false alarms while maintaining sensitivity to gear damage was developed. This analysis focused on two vibration based gear damage detection algorithms, FM4 and MSA. This method was developed using vibration data collected during surface fatigue tests performed in a spur gearbox rig. The thresholds were defined based on damage progression during tests with damage. The thresholds false alarm rates were then evaluated on spur gear tests without damage. Next, the same thresholds were applied to flight data from an OH-58 helicopter transmission. Results showed that thresholds defined in test rigs can be used to define thresholds in flight to correctly classify the transmission operation as normal.

Authors

Dempsey, Paula J. NASA Glenn Research Center
Mosher, Marianne NASA Ames Research Center
Huff, Edward M. NASA Ames Research Center

Citation: Dempsey, Paula J., Mosher, Marianne, Huff, Edward M. (2019). Threshold Assessment of Gear Diagnostic Tools on Flight and Test Rig Data. Glenn Research Center. NASA NTRS ID 20030062789. https://ntrs.nasa.gov/citations/20030062789 ↗