OPTIMAL MAINTENANCE AND REPLACEMENT OF EXTRACTION MACHINERY

This paper considers a problem of optimal preventive maintenance and replacement schedule of equipment devoted to extracting resources from known deposits. Typical examples are oil drills, mine shovels, etc. At most one replacement of the existing machinery by a new one is allowed. The problem is fo...

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Veröffentlicht in:Journal of systems science and systems engineering 2008-12, Vol.17 (4), p.416-431
Hauptverfasser: Sethi, Suresh P., Yeh, Hong-Mo, Zhang, Rong, Jardine, Andrew K.S.
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Sprache:eng
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Zusammenfassung:This paper considers a problem of optimal preventive maintenance and replacement schedule of equipment devoted to extracting resources from known deposits. Typical examples are oil drills, mine shovels, etc. At most one replacement of the existing machinery by a new one is allowed. The problem is formulated as an optimal control problem subject to the state constraint that the remaining deposit at any given time is nonnegative. We show that the optimal preventive maintenance, production rates, and the replacement and salvage times of the existing machinery and the new one, if required, can be obtained by solving sequentially a series of free-end-point optimal control problems. Moreover, an algorithm based on this result is developed and used to solve two illustrative examples.
ISSN:1004-3756
1861-9576
DOI:10.1007/s11518-008-5090-x