A Possibilistic Approach for Uncertainty Representation and Propagation in Similarity-Based Prognostic Health Management Solutions

• 作者: Alessandro Ferrero Giacomo Leone Loredana Cristaldi Simona Salicone
• 来源期刊: 统计学期刊(英文)
• 学科: 数学
• 关键词: DATA-DRIVEN Epistemic Uncertainty Measurement Uncertainty Future Uncertainty Prognostics and Health Management Random Fuzzy Variable Remaining Useful Life SIMILARITY
• 年，卷（期）: 2020,（6）
• 页码范围: 1020-1038
• 页数: 19页
• 分类号: O17

摘要

In this paper, a data-driven prognostic model capable to deal with different sources of uncertainty is proposed. The main novelty factor is the application of a mathematical framework, namely a Random Fuzzy Variable (RFV) approach, for the representation and propagation of the different uncertainty sources affecting </span><span style="font-family:Verdana;">Prognostic Health Management (PHM) applications: measurement, future and model uncertainty. </span><span style="font-family:Verdana;">In this way, it is possible to deal not only with measurement noise and model parameters uncertainty due to the stochastic nature of the degradation process, but also with systematic effects, such as systematic errors in the measurement process, incomplete knowledge of the degradation process, subjective belief about model parameters. Furthermore, the low analytical complexity of the employed prognostic model allows to easily propagate the measurement and parameters uncertainty into the RUL forecast, with no need of extensive Monte Carlo loops, so that low requirements in terms of computation power are needed. The model has been applied to two real application cases, showing high accuracy output, resulting in a potential</span></span><span style="font-family:Verdana;">ly</span><span style="font-family:Verdana;"> effective tool for predictive maintenance in different industrial sectors.