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引用次数: 0
摘要
考虑到在变载荷和噪声环境下捕捉局部和全局上下文信息、提高轴承故障诊断并行能力的问题,提出了一种基于 PE-DCM 和 ViT 的滚动轴承故障诊断方法。首先,在数据处理模块中通过连续小波变换将一维振动信号转换为二维时频图,该模型能更全面地了解振动信号的特征。其次,建立金字塔指数膨胀卷积模块,提取故障信息的局部特征。然后,通过 ViT(Vision Transformer)网络学习故障信息的全局特征,并利用自适应多注意功能根据输入数据的特征动态调整注意权重,以抑制噪声或不重要的信息。最后,利用凯斯西储大学和自制的 MFS 负载数据集进行了实验验证。实验结果表明,与其他故障诊断方法相比,该方法能更好地体现 ViT 网络强大的图像分类能力,并具有更好的抗噪性和泛化能力。
Rolling bearing fault diagnosis method based on PE-DCM and ViT
Considering the issue of capturing the local and global contextual information and enhancing the parallel capability of bearing fault diagnosis in variable load and noise environments, a fault diagnosis method of rolling bearing based on PE-DCM and ViT is proposed. Firstly, the one-dimensional vibration signal is converted into a two-dimensional time-frequency diagram by continuous wavelet transform in the data processing module, and the model can understand the characteristics of the vibration signal more comprehensively. Secondly, a pyramid exponential expansion convolution module is established to extract the local features of fault information. Then, the global features of the fault information are learnt through the ViT (Vision Transformer) network, and the adaptive multi-attention is used to dynamically adjust the attention weights according to the features of the input data so as to inhibit noise or unimportant information. Finally, the experimental verification is carried out by using Case Western Reserve University and self-made MFS-bearing data set. The experimental results show that the method can better reflect the powerful image classification ability of the ViT network and has better noise resistance and generalization compared with other fault diagnosis methods.
期刊介绍:
ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications.
The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.