Processing and Interpretation of Crack-Propagation Sensors

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Published Oct 18, 2015
DOI https://doi.org/10.36001/phmconf.2015.v7i1.2759
Nenad G. Nenadic
Rochester Institute of Technology, Rochester, NY, 14526, USA
Paul A. Ardis
GE Global Research Center, 1 Research Circle, Niskayuna, NY, 12309
Adrian Hood
US Army Research Laboratory, 4603 Flare Loop, Aberdeen Proving Ground, MD 21085
Michael G. Thurston
Rochester Institute of Technology, Rochester, NY, 14526, USA
David G. Lewicki
NASA Glenn Research Center, 21000 Brookpark Rd. - MS 23-3, Cleveland, OH 44135

Abstract

The goal of gearbox prognostics, once a failure has been detected, is to estimate the degree of damage. Development of probabilistic damage assessment requires high quality ground truth. The present report describes practical analysis, processing, and interpretation of signals from crack-propagation sensors and damage estimation during gear teeth crack propagation. The study considers two types of crack propagations: one for a fatigue-tester-based crack propagation, and the other for a propagation in a gearbox. Crack closing occurs in both types of crack propagation and must be accounted for in assessing the damage. The analysis is conducted for sensors connected as a voltage divider. Signal conditioning and wire breakage inference are examined in detail. In addition, we discuss how equipping each gear tooth with two crack- propagation sensors, one on each gear face, can provide a better damage estimation.

How to Cite

G. Nenadic, N. ., A. Ardis, P., Hood, A. ., G. Thurston, M. ., & G. Lewicki, D. . (2015). Processing and Interpretation of Crack-Propagation Sensors. Annual Conference of the PHM Society, 7(1). https://doi.org/10.36001/phmconf.2015.v7i1.2759
Abstract 225 | PDF Downloads 139

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Keywords

gear failure, Crack propagation, cracks, damage assessment

Issue
Vol. 7 No. 1 (2015): Proceedings of the Annual Conference of the PHM Society 2015
Section
Technical Research Papers

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