Selection and identification of a shape function for modeling degradation as a gamma process

Olli Saarela, Bengt Helge Nystad, Aimo Taipale, Olli Ventä

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)

    Abstract

    This paper proposes an approach for estimation of Remaining Useful Life (RUL), in which data from earlier lifetimes is utilized in the identification of the functional shape of degradation. A set of candidate shape functions are identified, and one of them is selected for RUL estimation, and consequently for inference, based on information theory. The feasibility of the approach is studied using functional forms of degradation acquired through air filter loading experiments and air quality measurements representing degrading factors. The study indicates the usefulness of utilizing data from previous lifetimes when reliable enough a priori information of the degradation phenomena is not available. The observed improvement in accuracy was considerable at long prediction horizons, which is beneficial especially in Condition-Based Maintenance applications (not limited to air filters) with infrequent maintenance shutdowns.
    Original languageEnglish
    Title of host publicationStructural Health Monitoring 2013
    Subtitle of host publicationa roadmap to intelligent structures
    EditorsFu-Kuo Chang
    Place of PublicationLancaster
    PublisherDEStech Publications Inc.
    Pages791-798
    Volume1
    ISBN (Electronic)978-1-5231-0105-4
    ISBN (Print)978-1-60595-115-7
    Publication statusPublished - 2013
    MoE publication typeA4 Article in a conference publication
    Event9th International Workshop on Structural Health Monitoring, IWSHM 2013 - Stanford, CA, United States
    Duration: 10 Sept 201312 Sept 2013

    Conference

    Conference9th International Workshop on Structural Health Monitoring, IWSHM 2013
    Abbreviated titleIWSHM 2013
    Country/TerritoryUnited States
    CityStanford, CA
    Period10/09/1312/09/13

    Keywords

    • remaining useful life
    • maintenance
    • ari filters

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