A Belief Function Theory Method for Prognostics in Clogging Filters
Baraldi, P.
Di Maio, F.
Mangili, F.
Zio, E.
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How to Cite

Baraldi P., Di Maio F., Mangili F., Zio E., 2013, A Belief Function Theory Method for Prognostics in Clogging Filters, Chemical Engineering Transactions, 33, 847-852.
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Abstract

This paper presents a similarity-based approach for the prediction of the Remaining Useful Life (RUL) of sea water filters placed upstream the heat exchangers of a nuclear reactor condenser. The prognostic approach is developed considering a library of reference degradation trajectories containing parameter observations taken from a set of similar equipments until their failures. The prediction of the RUL of the a filter is obtained by comparing its degradation trajectory to the reference trajectories and by properly aggregating the RULs of the training trajectories using a weighted sum which takes into account the similarity within test and training trajectories. In order to provide a measure of confidence in the RUL prediction in the form of a prediction interval, we place our work within the framework of belief function theory and we assign to each reference trajectory a belief proportional to its similarity to the test trajectory. A prediction interval is then obtained by properly combining these belief assignments using the Dempster’s rule.
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