A Wiener-Process-Model-Based Method for Remaining Useful Life Prediction Considering Unit-to-Unit Variability

Remaining useful life (RUL) prediction has attracted more and more attention in recent years because of its significance in predictive maintenance. The degradation processes of systems from the same population are generally different from one another due to their various operational conditions and h...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2019-03, Vol.66 (3), p.2092-2101
Main Authors: Li, Naipeng, Lei, Yaguo, Yan, Tao, Li, Ningbo, Han, Tianyu
Format: Article
Language:English
Subjects:
Algorithms
Computer simulation
Degradation
Filtration
Life prediction
Mathematical models
Maximum likelihood estimation
Modeling
Parameter estimation
Particle filtering (PF)
Prediction algorithms
Predictive maintenance
Predictive models
remaining useful life (RUL) prediction
Resampling
Trajectory
Turbofan engines
unit maximum likelihood estimation (UMLE)
unit-to-unit variability (UtUV)
Useful life
Wiener process model (WPM)
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Summary:Remaining useful life (RUL) prediction has attracted more and more attention in recent years because of its significance in predictive maintenance. The degradation processes of systems from the same population are generally different from one another due to their various operational conditions and health states. This behavior is defined as unit-to-unit variability (UtUV), which brings difficulty to RUL prediction. To handle this problem, this paper develops a Wiener-process-model (WPM)-based method for RUL prediction with the consideration of the UtUV. In this method, an age- and state-dependent WPM is specially designed to describe the various degradation processes of different units. A unit maximum likelihood estimation (UMLE) algorithm is proposed to estimate the UtUV parameter according to the measurements of training units, without any restriction to the distribution pattern of the parameter. The UtUV parameter is further updated via particle filtering (PF) according to the measurements of the testing unit. In the particle updating process, a fuzzy resampling algorithm is developed to handle the sample impoverishment problem of PF. With the updated parameter, the RUL is predicted through a degradation process simulation algorithm. The effectiveness of the proposed method is verified through a simulation study and a turbofan engine degradation dataset.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2018.2838078