Joint modelling and optimization of monitoring and maintenance performance for a two-unit parallel system

Barros, Anne; Grall, Antoine; Bérenguer, Christophe

doi:10.1243/1748006xjrr31

Cited by 9 publications

(6 citation statements)

References 11 publications

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“…However, considering that measurement errors are inevitable in practice, an inspection can be imperfect in two ways [28]: a false positive (FP) occurs when the inspection reveals that maintenance is needed while in fact it is not, and a false negative (FN) occurs when the inspection reveals that maintenance is not needed while in fact it is. These two imperfect inspection results will lead to additional cost due to premature maintenance activity or unrevealed risk for future operation [29], and the performance of such a condition-based maintenance policy could be worse than that of a "blind" time-based preventive maintenance [30].…”

Section: Introductionmentioning

confidence: 99%

Condition-based maintenance with imperfect inspections for continuous degradation processes

Hao

Yang

Bérenguer

2020

Applied Mathematical Modelling

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A condition-based maintenance (CBM) strategy is now recognized as an efficient approach to perform maintenance at the best time before failures so as to save lifetime cycle cost. For continuous degradation processes, a significant source of variability lies in measurement errors caused by imperfect inspections, and this may lead to "false positive" or "false negative" observations, and consequently to inopportune maintenance decisions. To the best of our knowledge, researches on CBM optimization with imperfect inspections remain limited for continuous degradation processes, even though the subject is of practical interest for the implementation of a CBM policy. Imperfect inspections are indeed imperfect but still return interesting information on the system degradation level, and making them perfect can be expensive. Therefore, we analyze the economic performance of a maintenance policy with imperfect inspections, and compare it with the classical policy with perfect inspections to see which policy offers the best benefit in a given situation. Furthermore, a CBM policy with a two-stage inspection scheme is proposed to take benefit of mixing both perfect and imperfect inspections in the same maintenance policy. Through numerical experiments and a real case study, it is shown that the policy with imperfect inspections can be better than the classical one, and that the proposed policy with a two-stage inspection scheme always leads to the minimum long run maintenance cost rate.

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Section: Introductionmentioning

confidence: 99%

Condition-based maintenance with imperfect inspections for continuous degradation processes

Hao

Yang

Bérenguer

2020

Applied Mathematical Modelling

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“…Barros et al 12 studied the optimal maintenance policy of a two-component parallel system based on imperfect monitoring information. Barros et al 13 proposed a new methodology for optimizing maintenance and monitoring the performance for a two-unit parallel system. Nourelfath and Chatelet 14 considered the PM and tactical production planning for a parallel system.…”

Section: Introductionmentioning

confidence: 99%

A delay-time-based inspection model for parallel systems

Liu

Wang

Peng

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part O:

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The delay-time concept has been extensively applied in the field of maintenance, especially for determining the optimal inspection or maintenance interval. It defines a two-stage system failure process: the time from new to an initial defect, known as the normal stage, and the time from this defective point to failure, known as the delay-time stage. Previous works using the delay-time concept have mainly focused on single-component systems and multi-component systems with a series configuration. However, parallel systems also exist in reality, but most existing models for parallel systems use either a single-stage time-to-failure process or a Markov chain to describe the failure mechanism. In this article, we propose a new delay-time-based inspection model for a n-component parallel system and study the optimal inspection interval that minimizes the long-term expected cost per unit time. Two maintenance policies are considered, depending on whether the defective/failed components identified are replaced immediately or not. Numerical examples are presented to show the applicability of the model.

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“…In literature, a structure's health has been monitored using the electrical or magnetic impedance method (Giurgiutiu et al 4 ), low frequency vibrations (Friswell and Penny 5 ), and transmittance function monitoring (Zhang et al 6 ), to name a few. Barros et al 7 developed a simple optimization scheme to choose the optimal maintenance technology for a given structure.…”

Section: Introductionmentioning

confidence: 99%

Skipping unnecessary structural airframe maintenance using an on-board structural health monitoring system

Pattabhiraman

Gogu

Kim

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part O:

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Structural airframe maintenance is a subset of scheduled maintenance, and is performed at regular intervals to detect and repair cracks that would otherwise affect the safety of the airplane. It has been observed that only a fraction of airplanes undergo structural airframe maintenance at earlier scheduled maintenance times. But, intrusive inspection of all panels on the airplanes needs to be performed at the time of scheduled maintenance to ascertain the presence/absence of large cracks critical to the safety of the airplane. Recently, structural health monitoring techniques have been developed. They use on-board sensors and actuators to assess the current damage status of the airplane, and can be used as a tool to skip the structural airframe maintenance whenever deemed unnecessary. Two maintenance philosophies, scheduled structural health monitoring and condition-based maintenance skip, have been developed in this article to skip unnecessary structural airframe maintenances using the on-board structural health monitoring system. A cost model is developed to quantify the savings of these maintenance philosophies over scheduled maintenance.

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Joint modelling and optimization of monitoring and maintenance performance for a two-unit parallel system

Cited by 9 publications

References 11 publications

Condition-based maintenance with imperfect inspections for continuous degradation processes

Condition-based maintenance with imperfect inspections for continuous degradation processes

A delay-time-based inspection model for parallel systems

Skipping unnecessary structural airframe maintenance using an on-board structural health monitoring system

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