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This paper deals with a maintenance optimization problem for a second hand system. The system is purchased from a second hand market, upgraded and then moved to operate under a more severe operating environment than the initial one. The system degrades stochastically and its degradation process is impacted by the operating environment where it evolves. The present paper investigates the relationship...
In maintenance engineering, it is intended that in a Block Replacement Policy (BRP) model, items are removed and replaced by new ones at failure and at the beginning of each scheduled time kT (fe = 1, 2, …). It was proved that this kind of strategies has its limits and didn't cover others particular situations. This paper addresses a modified BRP model, that in the same conditions, instead of using...
Risk and uncertainty are considered crucial and extremely problematic for economic and industrial systems. They must be handled with preciseness so that decision makers need first to establish an action plan for their mitigation by estimating the associated low frequency of failures and adverse events. This paper proposes a combination of solutions based on reliability estimation using enumerating...
In this paper, we describe a method for designing an active fault tolerant control system for speed sensor fault of an induction motor. The aim of this work is to develop an algorithm receiving multiple outputs from different version (sensor or observers) to choose between the most probably adequate for such situation (nominal or faulty). This algorithm is called maximum-likelihood voting (MLV) algorithm...
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