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arXiv 1812.03315cs.LGeess.SPstat.ML
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基于深度学习的轴承剩余使用寿命预测方法

A deep learning-based remaining useful life prediction approach for bearings

Huazhong University of Science and Technology(华中科技大学);Wuhan University of Science and Technology(武汉科技大学);Zhejiang University(浙江大学);Imperial College London(帝国理工学院)

Cheng Cheng, Guijun Ma, Yong Zhang, Mingyang Sun, Fei Teng, Han Ding, Ye Yuan

摘要:

在工业应用中,近一半的电机故障是由滚动轴承(REB)的退化引起的。因此,准确地估计REB的剩余使用寿命(RUL)是至关重要的,以确保机械系统的可靠性和安全性。为了应对这一挑战,基于模型的方法往往受到数学建模复杂性的限制。传统的数据驱动的方法,另一方面,需要大量的工作来提取退化特征和构建健康指数。在本文中,提出了一种新的在线数据驱动框架,以利用深度卷积神经网络(CNN)预测轴承的RUL。更具体地说,训练轴承的原始振动首先使用希尔伯特黄变换(HHT)处理和一个新的非线性退化指标被构造为学习的标签。然后采用CNN来识别提取的劣化指标与训练轴承的振动之间的隐藏模式,这使得可以自动估计测试轴承的劣化。最后,利用$ε$ -支持向量回归模型对试验轴承的RUL进行了预测。通过实验结果表明,与最先进的方法相比,所提出的RUL估计框架的优越性能。提出的CNN模型的通用性也通过转移到轴承经历不同的操作条件进行验证。

英文摘要:

In industrial applications, nearly half the failures of motors are caused by the degradation of rolling element bearings (REBs). Therefore, accurately estimating the remaining useful life (RUL) for REBs are of crucial importance to ensure the reliability and safety of mechanical systems. To tackle this challenge, model-based approaches are often limited by the complexity of mathematical modeling. Conventional data-driven approaches, on the other hand, require massive efforts to extract the degradation features and construct health index. In this paper, a novel online data-driven framework is proposed to exploit the adoption of deep convolutional neural networks (CNN) in predicting the RUL of bearings. More concretely, the raw vibrations of training bearings are first processed using the Hilbert-Huang transform (HHT) and a novel nonlinear degradation indicator is constructed as the label for learning. The CNN is then employed to identify the hidden pattern between the extracted degradation indicator and the vibration of training bearings, which makes it possible to estimate the degradation of the test bearings automatically. Finally, testing bearings' RULs are predicted by using a $ε$-support vector regression model. The superior performance of the proposed RUL estimation framework, compared with the state-of-the-art approaches, is demonstrated through the experimental results. The generality of the proposed CNN model is also validated by transferring to bearings undergoing different operating conditions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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