计算机科学
维数(图论)
系列(地层学)
构造(python库)
特征(语言学)
过程(计算)
编码器
人工神经网络
人工智能
循环神经网络
存储单元
时间序列
自编码
模式识别(心理学)
数据挖掘
机器学习
数学
哲学
古生物学
物理
操作系统
电压
晶体管
程序设计语言
纯数学
生物
量子力学
语言学
作者
Song Fu,Shisheng Zhong,Lin Lin,Minghang Zhao
出处
期刊:IEEE transactions on neural networks and learning systems
[Institute of Electrical and Electronics Engineers]
日期:2022-12-01
卷期号:33 (12): 7114-7125
被引量:33
标识
DOI:10.1109/tnnls.2021.3084249
摘要
One of the significant tasks in remaining useful life (RUL) prediction is to find a good health indicator (HI) that can effectively represent the degradation process of a system. However, it is difficult for traditional data-driven methods to construct accurate HIs due to their incomprehensive consideration of temporal dependencies within the monitoring data, especially for aeroengines working under nonstationary operating conditions (OCs). Aiming at this problem, this article develops a novel unsupervised deep neural network, the so-called times series memory auto-encoder with sequentially updated reconstructions (SUR-TSMAE) to improve the accuracy of extracted HIs, which directly takes the multidimensional time series as input to simultaneously achieve feature extraction from both feature-dimension and time-dimension. Further, to make full use of the temporal dependencies, a novel long-short time memory with sequentially updated reconstructions (SUR-LSTM), which uses the errors not only from the current memory cell but also from subsequent memory cells to update the output layer's weight of the current memory cell, is developed to act as the reconstructed layer in the SUR-TSMAE. The use of SUR-LSTM can help the SUR-TSMAE rapidly reconstruct the input time series with higher precision. Experimental results on a public dataset demonstrate the outstanding performance of SUR-TSMAE in comparison with some existing methods.
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