Remaining Useful Life Prediction by Fusing Expert Knowledge and Condition Monitoring Information

Tangfan Xiahou (1) , Zhiguo Zeng (2) , Yu Liu (1)

1 UESTC - University of Electronic Science and Technology of China [Chengdu]
2 LGI - Laboratoire Génie Industriel

In this article, we develop a mixture of Gaussians-evidential hidden Markov model (MoG-EHMM) to fuse expert knowledge and condition monitoring information for remaining useful life (RUL) prediction under the belief function theory framework. The evidential expectation-maximization algorithm is implemented in the offline phase to train the MoG-EHMM based on historical data. In the online phase, the trained model is used to recursively update the health state and reliability of a particular individual system. The predicted RUL is, then, represented in the form of its probability mass function. A numerical metric is defined based on the Bhattacharyya distance to measure the RUL prediction accuracy of the developed methods. We applied the developed methods on a simulation experiment and a real-world dataset from a bearing degradation test. The results demonstrate that despite imprecisions in expert knowledge, the performance of RUL prediction can be substantially improved by fusing expert knowledge with condition monitoring information.

Mots clés: Belief function theory; expert knowledge; Mixture of Gaussians-evidential hidden Markov model (MoG-EHMM); remaining useful life (RUL)

Domaines: Autre; Applications [stat.AP]

Tangfan Xiahou, Zhiguo Zeng, Yu Liu. Remaining Useful Life Prediction by Fusing Expert Knowledge and Condition Monitoring Information. IEEE Transactions on Industrial Informatics, 2021, 17 (4), pp.2653-2663. ⟨10.1109/TII.2020.2998102⟩. ⟨hal-03464082⟩