A Novel Individual Aircraft Life Monitoring Method Based on Reliable Life Consumption Assessment

IF 2.1 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Machines Pub Date : 2023-11-08 DOI:10.3390/machines11111016

Yueshuai Fu, Huimin Fu

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Abstract

Individual life monitoring is crucial for ensuring aircraft flight safety. Conventional life-consumption-based monitoring methods ignore reliability, thus disjoining them from the aircraft’s reliable life determination and extension, where high confidence and reliability are required. Therefore, this paper proposes a reliable life consumption and individual life monitoring method for aircraft structure fatigue. In the paper, the P-S-N curve, i.e., the relationship between the aircraft structure’s life (N) and fatigue load (S) under a certain probability (P), is established, by which the lower confidence limit of the aircraft structure’s reliable life can be evaluated under any fatigue loads. Based on that and the aircraft’s monitored fatigue loads, the indexes of reliable life consumption and remaining reliable life percentages are proposed and assessed in real time for individual aircraft life monitoring and online life management. Case studies indicate that the proposed method can guarantee high confidence and reliability requirements in individual life monitoring, consistent with the aircraft’s life determination and extension, which are widely accepted nowadays in engineering practice.

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基于可靠寿命消耗评估的单架飞机寿命监测新方法

个人生命监测是保障飞机飞行安全的关键。传统的基于寿命消耗的监测方法忽略了可靠性，从而脱离了飞机可靠的寿命确定和延长，而这需要高置信度和可靠性。为此，本文提出了一种可靠的飞机结构疲劳寿命消耗和个体寿命监测方法。本文建立了飞机结构在一定概率(P)下的寿命(N)与疲劳载荷(S)的关系P-S-N曲线，以此来评估飞机结构在任意疲劳载荷下的可靠寿命的置信下限。在此基础上，结合飞机疲劳载荷监测情况，提出了可靠寿命消耗指标和剩余可靠寿命百分比指标，并对其进行实时评估，用于单机寿命监测和在线寿命管理。实例研究表明，该方法能够保证个体寿命监测的高置信度和可靠性要求，符合当前工程实践中广泛接受的飞机寿命确定和延长要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Machines Multiple-

CiteScore

3.00

自引率

26.90%

发文量

1012

审稿时长

11 weeks

期刊介绍： Machines (ISSN 2075-1702) is an international, peer-reviewed journal on machinery and engineering. It publishes research articles, reviews, short communications and letters. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided. There are, in addition, unique features of this journal: *manuscripts regarding research proposals and research ideas will be particularly welcomed *electronic files or software regarding the full details of the calculation and experimental procedure - if unable to be published in a normal way - can be deposited as supplementary material Subject Areas: applications of automation, systems and control engineering, electronic engineering, mechanical engineering, computer engineering, mechatronics, robotics, industrial design, human-machine-interfaces, mechanical systems, machines and related components, machine vision, history of technology and industrial revolution, turbo machinery, machine diagnostics and prognostics (condition monitoring), machine design.