An adaptive prognostics method based on a new health index via data fusion and diffusion process

Peng Li, Ahmed Maged, Aibo Zhang, Min Xie*, Wei Dang, Congmin Lyu

*Corresponding author for this work

    Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

    17 Citations (Scopus)

    Abstract

    Remaining useful life prediction (RUL) is critical in predictive maintenance for components or systems prone to deterioration. However, direct RUL prediction methods have difficulties tracking health trends and realizing online prognostics. To address this issue, this paper proposes a novel health index (HI) based adaptive prognostics method by leveraging the advantages of both data fusion to handle multi-dimensional data and the adaptive extended Kalman filter (AEKF) algorithm for parameter identification in the diffusion process. A fitness metric is proposed for feature selection, and then the composite HI sequence is constructed via data fusion using the genetic algorithm. Furthermore, a diffusion process model is built to characterize HI degradation while considering multi-source uncertainties. Model parameters are then updated using the fitting-based AEKF method. Finally, the proposed method is validated on a real-world dataset of solid-state drives in data centers, and prediction results and comparative studies verify its superiority.
    Original languageEnglish
    Article number110968
    JournalMeasurement
    Volume193
    Online published7 Mar 2022
    DOIs
    Publication statusPublished - Apr 2022

    Funding

    This work is supported by National Natural Science Foundation of China (71971181 and 72032005) and by Research Grant Council of Hong Kong (11203519, 11200621). It is also funded by Hong Kong Innovation and Technology Commission (InnoHK Project CIMDA) and Hong Kong Institute of Data Science (Project 9360163).

    Research Keywords

    • Adaptive extended Kalman filter (AEKF)
    • Genetic algorithm
    • Remaining useful life (RUL)
    • Solid-state drives (SSDs)

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