Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (9): 2986-2998.doi: 10.12305/j.issn.1001-506X.2023.09.40

• Reliability • Previous Articles    

Diesel engine fault diagnosis method based on wavelet time-frequency diagram and Swin Transformer

Zichang LIU1,2, Yongsheng BAI1, Siyu LI1, Xisheng JIA1,*   

  1. 1. Shijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, China
    2. Hebei Provincial Key Lab of Condition Monitoring and Assessment of Mechanical Equipment, Shijiazhuang 050003, China
  • Received:2022-11-14 Online:2023-08-30 Published:2023-09-05
  • Contact: Xisheng JIA

Abstract:

In view of the problem that it is difficult to accurately and efficiently diagnosis the nonlinear and non-smooth diesel engine fault signals by traditional fault diagnosis methods, a diesel engine fault diagnosis method based on wavelet time-frequency diagram and Swin Transformer is proposed. The method can effectively combine the advantages of wavelet time-frequency analysis in processing nonlinear non-stationary signals and the powerful image classification capability of Swin Transformer, represent the original signals as wavelet time-frequency diagrams through continuous wavelet transform, and input the wavelet time-frequency diagrams as feature maps to Swin Transformer for training to achieve diesel engine fault status identification. The experimental results show that the proposed method has better fault identification accuracy and stability compared with the comparison methods, and the overall fault diagnosis accuracy reaches 100% and 98.88% in the public data set and the laboratory measured data respectively, which provides a new idea for diesel engine fault diagnosis.

Key words: continuous wavelet transform, wavelet time-frequency diagram, Swin Transformer, diesel engine, fault diagnosis

CLC Number: 

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