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• W4226395004 abstract "Most industrial products degrade with usage. To capture degradation patterns and schedule condition-based maintenance actions, it is necessary to model the degradation process and predict the system remaining useful life (RUL). In practice, the operating environments and loading conditions are dynamic and stochastic, which introduces extra randomness in the degradation process. To account for the dynamic environmental impacts, this article proposes a nonlinear Wiener process model with a random time-varying covariate. We model the dynamic covariate with an Ornstein–Uhlenbeck process, and link it to the time-varying degradation rate by an exponential form covariate-effect function. Therefore, the proposed Wiener process has a time-varying degradation rate impacted by the dynamic environment. We propose to estimate the model parameters by maximum likelihood estimation based on given observations of the degradation and covariate. We also propose a simulation-based procedure to obtain the RUL for the proposed model. The model is verified by Monte Carlo simulations. We apply the proposed model to a dust-cleaning fan degradation dataset and a lithium-ion battery degradation dataset, and the results show that the proposed model outperforms the existing degradation models in fitting the real data and RUL prediction." @default.
• W4226395004 created "2022-05-05" @default.
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• W4226395004 date "2023-03-01" @default.
• W4226395004 modified "2023-10-17" @default.
• W4226395004 title "A Wiener Process Model With Dynamic Covariate for Degradation Modeling and Remaining Useful Life Prediction" @default.
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• W4226395004 doi "https://doi.org/10.1109/tr.2022.3159273" @default.
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