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

• 作 者: Zhiwu Shang Wanxiang Li Maosheng Gao Xia Liu Yan Yu
• 机 构: School of Mechanical Engineering,Tiangong University,Tianjin 300387,China;Tianjin Modern Electromech
• 出 处: 中国机械工程学报
• 发表日期: 2021年4期
• 关键词: Fault diagnosis Feature fusion Information entropy Deep autoencoder Deep belief

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 extrac-tion 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.