摘要
预测与健康管理(prognostics and health management,PHM)指标是否科学将直接影响PHM的设计效果,进而影响装备的可用性。针对实践中缺乏理论性与可实现性强的PHM指标论证方法,提出从装备综合效能指标到PHM综合指标、再到PHM能力指标的分级论证方法。选取可用度作为装备综合效能指标,定义了健康状态评估率并将其作为PHM综合指标,推导出可用度与健康状态评估率的关系式,以可用度最大化为目标求解出健康状态评估率指标。证明了健康状态评估率等于故障覆盖率与评估准确度的乘积,二者分别取决于感知单元的数量和诊断预测方法的准确性,这对开展PHM设计有指导意义。通过案例检验了上述方法的有效性和实用性。
The PHM index is directly affected the design of PHM and the availability of equipment.In response to the shortage of theoretical and implementable methods,a graded demonstration method was introduced,outlining a progression from comprehensive efficiency indicators to PHM comprehensive indicators and then to PHM capability indicators.The availability was selected as the comprehensive efficiency indicator,and the health evaluation rate was defined as the PHM comprehensive indicator.The relationship between availability and health evaluation rate was derived.The optimal health evaluation rate was obtained by maximizing the availability.It was deduced that the health evaluation rate was equal to the product of fault coverage and evaluation accuracy,where depend on the number of sensors and the accuracy of diagnostic/prognostic methods,respectively.This conclusion can guide PHM design.The effectiveness and practicality of this method were verified by cases.
作者
杨鹏
张勇
邱静
刘冠军
YANG Peng;ZHANG Yong;QIU Jing;LIU Guanjun(College of Intelligence Science and Technology,National University of Defense Technology,Changsha 410073,China)
出处
《国防科技大学学报》
北大核心
2025年第6期287-295,共9页
Journal of National University of Defense Technology
基金
国家部委基金资助项目(50902060201)。
关键词
预测与健康管理
健康状态评估
健康状态评估率
故障预测率
可用度
prognostics and health management
health evaluation
health evaluation rate
fault prediction accuracy
availability
