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A state space condition monitoring model for furnace erosion prediction and replacement

Christer, AH, Wang, W and Sharp, JM 1997, 'A state space condition monitoring model for furnace erosion prediction and replacement' , European Journal of Operational Research, 101 , pp. 1-14.

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    Abstract

    The paper develops a replacement action decision aid for a key furnace component subject to condition monitoring. A state space model is used to predict the erosion condition of the inductors in an induction furnace in which a measure of the conductance ratio (CR) is used to indirectly assess the relative condition of the inductors, and to guide replacement decisions. This study seeks to improve on this decision process by establishing the relationship between CR and the erosion condition of the inductors. To establish such a relationship, a state space model has been established and the system parameters estimated from CR data. A replacement cost model to balance at any time costly replacements with possible catastrophic failure is also proposed based upon the predicted probability of inductor erosion conditional upon all available information. The well known Kalman filter is employed to derive the predicted and updated probability of inductor erosion level conditional upon CR data to date. This is the first time the condition monitoring decision process has been modelled for real plant based upon filtering theory. The model fits the data well, gives a sensible answer to the actual problem, and is transferable to other condition monitoring contexts. Possible extensions are discussed in the paper.

    Item Type: Article
    Uncontrolled Keywords: Maintenance; State space model; Kalman filter; Replacement; Condition monitoring
    Themes: Subjects / Themes > Q Science > QA Mathematics > QA275 Mathematical Statistics
    Subjects outside of the University Themes
    Schools: Colleges and Schools > College of Business & Law > Salford Business School > Operations and Global Logistics Management
    Journal or Publication Title: European Journal of Operational Research
    Publisher: Elsevier
    Refereed: Yes
    ISSN: 0377-2217
    Depositing User: W Wang
    Date Deposited: 24 Nov 2009 09:54
    Last Modified: 20 Aug 2013 17:01
    URI: http://usir.salford.ac.uk/id/eprint/2544

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