An Intelligent Fault Diagnosis Method of Multi-Scale Deep Feature Fusion Based on Information Entropy

Chinese Journal of Mechanical Engineering

Maosheng Gao¹  Xia Liu¹  Wanxiang Li¹  Zhiwu Shang¹  Yan Yu¹ 

[1] School of Mechanical Engineering, Tiangong University, 300387, Tianjin, China;Tianjin Modern Electromechanical Equipment Technology Key Laboratory, 300387, Tianjin, China;

关键词: Fault diagnosis;    Feature fusion;    Information entropy;    Deep autoencoder;    Deep belief network;   

DOI  :  10.1186/s10033-021-00580-5

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY