Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74312
Title: Detection of performance deterioration of high-speed train wheels based on Bayesian dynamic model
Authors: Wang, YW 
Ni, YQ 
Wang, X 
Issue Date: 2017
Publisher: DEStech Publications
Source: In FK Chang & F Kopsaftopoulos (Eds.), Structural Health Monitoring 2017 Real-Time Material State Awareness and Data-Driven Safety Assurance ; Proceedings of the Eleventh International Workshop on Structural Health Monitoring, September 12-14, 2017, 2017, v. 2, p. 2808-2815. Lancaster, PA: DEStech Publications, 2017 How to cite?
Abstract: This paper presents a novel technique, in the context of Bayesian dynamic linear model (BDLM) and Bayesian forecasting, for detecting the performance deterioration of high-speed train wheels using online monitoring data of strain acquired from in-service train bogies. The BDLM is a tool for time series analysis and Bayesian forecasting enables to calculate one-step ahead forecast distribution. The change detection is carried out by checking the current observation against the current model (forecast distribution generated by the BDLM for current instant) as well as against an alternative model (whose mean value is shifted by a prescribed offset). The detection rule is that if the alternative model better fits the actual observation, a potential change is alarmed. To further determine whether the current observation is an outlier or the beginning of a change, a specific logic is developed by introducing the Bayes factors and cumulative Bayes factors. The proposed method is demonstrated by using the monitoring data acquired from an in-service high-speed train under different wheel quality conditions.
URI: http://hdl.handle.net/10397/74312
ISBN: 9781605953304
Appears in Collections:Conference Paper

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