Statistical gear health analysis which is robust to fluctuating loads and operating speeds
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Date
Authors
Heyns, Theo
Godsill, S.J.
De Villiers, Johan Pieter
Heyns, P.S. (Philippus Stephanus)
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Condition-based maintenance is concerned with the collection and interpretation of data to support maintenance decisions. The non-intrusive nature of vibration data enables the monitoring of enclosed systems such as gearboxes. It remains a significant challenge to analyze vibration data that are generated under fluctuating operating conditions. This is especially true for situations where relatively little prior knowledge regarding the specific gearbox is available. It is therefore investigated how an adaptive time series model, which is based on Bayesian model selection, may be used to remove the non-fault related components in the structural response of a gear assembly to obtain a residual signal which is robust to fluctuating operating conditions. A statistical framework is subsequently proposed which may be used to interpret the structure of the residual signal in order to facilitate an intuitive understanding of the condition of the gear system. The proposed methodology is investigated on both simulated and experimental data from a single stage gearbox.
Description
Keywords
Gear maintenance, Residual analysis, Bayesian model selection, Statistical gear model
Sustainable Development Goals
Citation
Heyns, T, Godsill, SJ, De Villiers, JP & Heyns, PS, 'Statistical gear health analysis which is robust to fluctuating loads and operating speeds', Mechanical Systems and Signal Processing, vol. 27, pp. 651–666 (2012), doi:10.1016/j.ymssp.2011.09.007.