A cyclostationary analysis applied to detection and diagnosis of faults in helicopter gearboxes

Estupiñan, E.A., White, P.R. and San Martin, César (2008) A cyclostationary analysis applied to detection and diagnosis of faults in helicopter gearboxes. Rueda, L., Mery, D. and Kittler, J. (eds.) In Progress in Pattern Recognition, Image Analysis and Applications. Proceedings of the 12th Iberoamerican Congress on Pattern Recognition, CIARP 2007, Valpariso, Chile 13-16 November 2007. vol. 4756, Springer. pp. 61-70 . (doi:10.1007/978-3-540-76725-1_7).

Abstract

In several cases the vibration signals generated by rotating machines can be modeled as cyclostationary processes. A cyclostationary process is defined as a non-stationary process which has a periodic time variation in some of its statistics, and which can be characterized in terms of its order of periodicity. This study is focused on the use of cyclic spectral analysis, as a tool to analyze second-order periodicity signals (SOP), such as, those who are generated by either localized or distributed defects in bearings. Cyclic spectral analysis mainly consists of the estimation of the random aspects as well as the periodic behavior of a vibration signal, based on estimation of the spectral correlation density. The usefulness of cyclic spectral analysis for the condition monitoring of bearings, is demonstrated in this paper, through the analysis of several sections of vibration data collected during an endurance test of one of the two main gearbox transmissions of a helicopter.
Most of this work was carried out at the ISVR of University of Southampton, funded with a grant from the Marie Curie Host Fellowships for Early Stage Research Training. The authors gratefully acknowledge the help of William Hardman who supplied the test bed data from H-60 tests conducted at the U. S. Navy’s Helicopter Transmission Test Facility located at Patuxent River, Maryland and of Sally McInnery, University of Alabama.

This record has no associated files available for download.

Contributors

Author: P.R. White

Download statistics