Abstract Piezoelectric materials have a capability to absorb energy from surroundings and transform it into electrical energy. Energy harvesting is an absolute task in the aerospace industry to drive wireless sensors. In this paper, multi-state reliability risk assessment based on importance measures for aeroelastic piezoelectric energy harvesters (APEH) is carried out. The risk assessment evaluates the system based on its different states of operation and enables a reliability risk analyst to access dynamically the risk associated with the components of the system. A multi-state importance measures based APEH risk assessment system is not just capable of evaluating the risk at system, subsystem and component level but also takes into account the relative states of the system, subsystem and components. The proposed risk assessment gives a relative importance factor to each input thus identifying the most important subsystem for the system and most important component to the subsystem. Such risk results can be very useful for the maintenance engineers and risk analyst of the aerospace industry so that the respective maintenance actions can be made more targeted and proactively anticipated. The results indicate the proposed methodology to be highly effective and efficient.

中文翻译：

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气动弹性压电能量收集器的可靠性风险分析

摘要 压电材料具有从环境中吸收能量并将其转化为电能的能力。能量收集是航空航天工业中驱动无线传感器的一项绝对任务。在本文中，基于气动弹性压电能量采集器（APEH）的重要性度量进行了多状态可靠性风险评估。风险评估根据系统的不同操作状态对系统进行评估，并使可靠性风险分析师能够动态访问与系统组件相关的风险。基于多状态重要性度量的APEH风险评估系统不仅能够评估系统、子系统和组件级别的风险，而且还考虑了系统、子系统和组件的相对状态。建议的风险评估为每个输入提供了一个相对重要性因素，从而确定系统最重要的子系统和子系统最重要的组件。此类风险结果对于航空航天业的维护工程师和风险分析师非常有用，因此可以使各自的维护行动更有针对性并更积极地进行预测。结果表明所提出的方法是非常有效和高效的。