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Sensors 2018, 18(9), 2932; https://doi.org/10.3390/s18092932

A Time-Distributed Spatiotemporal Feature Learning Method for Machine Health Monitoring with Multi-Sensor Time Series

1
Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300350, China
2
School of Mechanical Engineering, Tianjin University, Tianjin 300354, China
3
Institute for Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Received: 25 July 2018 / Revised: 19 August 2018 / Accepted: 28 August 2018 / Published: 3 September 2018
(This article belongs to the Collection Multi-Sensor Information Fusion)
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Abstract

Data-driven methods with multi-sensor time series data are the most promising approaches for monitoring machine health. Extracting fault-sensitive features from multi-sensor time series is a daunting task for both traditional data-driven methods and current deep learning models. A novel hybrid end-to-end deep learning framework named Time-distributed ConvLSTM model (TDConvLSTM) is proposed in the paper for machine health monitoring, which works directly on raw multi-sensor time series. In TDConvLSTM, the normalized multi-sensor data is first segmented into a collection of subsequences by a sliding window along the temporal dimension. Time-distributed local feature extractors are simultaneously applied to each subsequence to extract local spatiotemporal features. Then a holistic ConvLSTM layer is designed to extract holistic spatiotemporal features between subsequences. At last, a fully-connected layer and a supervised learning layer are stacked on the top of the model to obtain the target. TDConvLSTM can extract spatiotemporal features on different time scales without any handcrafted feature engineering. The proposed model can achieve better performance in both time series classification tasks and regression prediction tasks than some state-of-the-art models, which has been verified in the gearbox fault diagnosis experiment and the tool wear prediction experiment. View Full-Text
Keywords: multi-sensor time series; deep learning; machine health monitoring; time-distributed ConvLSTM model; spatiotemporal feature learning multi-sensor time series; deep learning; machine health monitoring; time-distributed ConvLSTM model; spatiotemporal feature learning
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Qiao, H.; Wang, T.; Wang, P.; Qiao, S.; Zhang, L. A Time-Distributed Spatiotemporal Feature Learning Method for Machine Health Monitoring with Multi-Sensor Time Series. Sensors 2018, 18, 2932.

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