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A novel method of health indicator construction and remaining useful life prediction based on deep learning
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Army Engineering University of PLA, China
Hebei Key Laboratory of Condition Monitoring and Assessment of Mechanical Equipment, China
North China Institute of Aerospace Engineering, China
Submission date: 2023-06-14
Final revision date: 2023-07-18
Acceptance date: 2023-08-18
Online publication date: 2023-08-26
Corresponding author
Xisheng Jia   

Army Engineering University of PLA, Shijiazhuang, China, 050003, Shijiazhuang, China
Eksploatacja i Niezawodność – Maintenance and Reliability 2023;25(4):171374
  • Utilize technologies such as SK and VMD to extract multi-domain features as feature sets.
  • Utilize monotonicity, trendiness, and robustness to select features for fusion and construct HI.
  • Combining SSAE with LSTM for condition assessment and residual life prediction.
The construction of health indicators (HI) for traditional deep learning requires human training labels and poor interpretability. This paper proposes an HI construction method based on Stacked Sparse Autoencoder (SSAE) and combines SSAE with Long short-term memory (LSTM) network to predict the remaining useful life (RUL). Extracting features from a single domain may result in insufficient feature extraction and cannot comprehensively reflect the degradation status information of mechanical equipment. In order to solve the problem, this article extracts features from time domain, frequency domain, and time-frequency domain to construct a comprehensive original feature set. Based on monotonicity, trendiness, and robustness, the most sensitive features from the original feature set are selected and put into the SSAE network to construct HI for state partitioning, and then LSTM is used for RUL prediction. By comparing with the existing methods, it is proved that the prediction effect of the proposed method in this paper is satisfied.
This work is supported by the Na tional Natural Science Foundation of China (grant no. 71871220 ). The support is gratefully acknowledged. The authors would also like to thank the reviewers for their valuable suggestions and comments.
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