期刊
CHINESE JOURNAL OF MECHANICAL ENGINEERING
卷 34, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1186/s10033-021-00580-5
关键词
Fault diagnosis; Feature fusion; Information entropy; Deep autoencoder; Deep belief network
资金
- Key Project of Tianjin Science and Technology Support Program [16YFZCSY00860]
- National Natural Science Foundation of China [U1733108]
- Civil Aviation Administration of China [U1733108]
This paper proposes a multi-scale deep feature fusion intelligent fault diagnosis method based on information entropy, using a variety of autoencoders to construct a deep neural network feature extraction structure and employing deep belief network probability model as the fault classifier. Experimental results show that compared to traditional methods, this approach obtains higher accuracy features from raw data.
For a single-structure deep learning fault diagnosis model, its disadvantages are an insufficient feature extraction and weak fault classification capability. This paper proposes a multi-scale deep feature fusion intelligent fault diagnosis method based on information entropy. First, a normal autoencoder, denoising autoencoder, sparse autoencoder, and contractive autoencoder are used in parallel to construct a multi-scale deep neural network feature extraction structure. A deep feature fusion strategy based on information entropy is proposed to obtain low-dimensional features and ensure the robustness of the model and the quality of deep features. Finally, the advantage of the deep belief network probability model is used as the fault classifier to identify the faults. The effectiveness of the proposed method was verified by a gearbox test-bed. Experimental results show that, compared with traditional and existing intelligent fault diagnosis methods, the proposed method can obtain representative information and features from the raw data with higher classification accuracy.
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