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POLITIQUES DE MAINTENANCE CONDITIONNELLE POUR UN SYSTEME A DEGRADATION CONTINUE SOUMIS A UN ENVIRONNEMENT STRESSANT

Abstract : One of the challenges of maintenance optimisation is the development of decision-making models combining performance at the strategic level and at the operational level. A classic hypothesis is to consider that the degradation level of the system can be modelled by a stochastic process characterized in stationary state without taking into account the effects of the operating environment on the system. This hypothesis can be seen as one of the factors leading to gaps between expected performance and measured performance of maintenance policies. However, many works have been developed in the reliability field for the integration of the impact of these environmental conditions. The main objective of this manuscript is to develop maintenance decision tools for gradually deteriorating systems evolving in a stressful environment. First, we propose different ways to model the environment and its impact since it can directly influence the system failure or the degradation process. We express mutual relationships between environment and the degradation processes. Next, we propose and compare different adaptive maintenance policies which are based not only on the degradation level, but also on the stressful environment level. In addition, the proposed policies can be based either on an a priori knowledge of the system, or integrate the available online information on the environment. We will try throughout this manuscript to propose new maintenance approaches which combine theoretical expected performance on one side and operational reality and pragmatism on the other.
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https://tel.archives-ouvertes.fr/tel-00348191
Contributor : Estelle Deloux <>
Submitted on : Thursday, December 18, 2008 - 10:17:49 AM
Last modification on : Monday, October 19, 2020 - 11:07:19 AM
Long-term archiving on: : Tuesday, June 8, 2010 - 5:43:48 PM

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  • HAL Id : tel-00348191, version 1

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Estelle Deloux. POLITIQUES DE MAINTENANCE CONDITIONNELLE POUR UN SYSTEME A DEGRADATION CONTINUE SOUMIS A UN ENVIRONNEMENT STRESSANT. Sciences de l'ingénieur [physics]. Université de Nantes, 2008. Français. ⟨tel-00348191⟩

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