Print Email Facebook Twitter Pareto-based maintenance decisions for regional railways with uncertain weld conditions using the Hilbert spectrum of axle box acceleration Title Pareto-based maintenance decisions for regional railways with uncertain weld conditions using the Hilbert spectrum of axle box acceleration Author Nunez, Alfredo (TU Delft Railway Engineering) Jamshidi, A. (TU Delft Railway Engineering) Wang, H. (TU Delft Railway Engineering) Date 2018-06-14 Abstract This paper presents a Pareto-based maintenance decision system for rail welds in a regional railway network. Weld health condition data are collected using a train in operation. A Hilbert spectrum-based approach is used for data processing to detect and assess the weld quality based on multiple registered dynamic responses in the axle box acceleration measurements. The assessment of the welds is stochastic in nature and variant over time, so a set of robust and predictive key performance indicators is defined to capture the weld degradation dynamics during a given maintenance period. Using a scenario-based approach, two objective functions are defined, performance and the number of weld replacements. Evolutionary multi-objective optimization is employed to optimize the objective functions so that the trade-offs between performance and cost support decision-making for railway network maintenance. The results of the proposed methodology show that the infrastructure manager can localize field inspections and maintenance efforts on the area with the most critical welds. To showcase the capability of the proposed methodology, measurements from a regional railway network in Transylvania, Romania are employed. Subject AccelerationAcceleration measurementsAxlesDegradationEvolutionary multi-objective optimizationMaintenanceMaintenance engineeringRail transportationRailsRailway infrastructureWelding To reference this document use: http://resolver.tudelft.nl/uuid:bc9f6b58-98f8-4eeb-ac89-49c3ba70e2a1 DOI https://doi.org/10.1109/TII.2018.2847736 Embargo date 2018-12-15 ISSN 1551-3203 Source IEEE Transactions on Industrial Informatics, 15 (2019) (3), 1496-1507 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 Alfredo Nunez, A. Jamshidi, H. Wang Files PDF Nunez_et_al_IEEETII.pdf 2.72 MB PDF 08386673.pdf 4.93 MB Close viewer /islandora/object/uuid:bc9f6b58-98f8-4eeb-ac89-49c3ba70e2a1/datastream/OBJ1/view