Fault diagnosis of computer numerical control machine tools table feed system based on digital twin and machine learning

• Autorzy: Dong Ying , Li Yanhua

Identyfikatory

DOI

10.29354/diag/195503

• Języki publikacji: EN

Abstrakty

EN

The mechanical operations performed by the computer numerical control machine tools feed system are more prone to failure, and its not conducive to the accuracy and stability of computer numerical control machine tools. As a result, this study proposes a fault diagnosis model that combines a digital twin with a multiscale parallel one-dimensional convolutional neural network. A digital twin model of the table feed system was first constructed and simulation experiments of various working conditions were conducted to obtain the missing fault data in the actual physical space. On this basis, the study utilizes the acquired signals to train the proposed migration model for diagnosis. The model extracts different types of fault features from the analog and real signals, respectively, through an intermediate multi-scale convolution algorithm. In addition, the model reduces the distributional disparities between the real and analog signals by using the Wasserstein distance as a regular term to impose constraints on the machine learning process. The study conducted simulation experiments, and the results indicated that the fault periods of the simulated and actual signals of bearing outer ring faults were 0.198s and 0.196s, respectively, with a relative error of only 1.02%. The average fault periods of the actual and simulated signals of the bearing inner ring faults were 0.199s and 0.197s, respectively, with a relative deviation of only 0.48%. In addition, the classification accuracy of the proposed model can be maintained above 95%. Thus, the proposed model has good practical value.

Słowa kluczowe

EN

digital twin; MSP-CNN; wasserstein distance; computer numerical control machine tools; table feed system; fault diagnosis

• Wydawca: Polskie Towarzystwo Diagnostyki Technicznej
• Czasopismo: Diagnostyka
• Rocznik: 2024
• Tom: Vol. 25, No. 4
• Strony: art. no. 2024414
• Opis fizyczny: Bibliogr. 25 poz., rys.

Twórcy

autor

Dong Ying

• College of Mechanical and Electrical Engineering, Shandong Vocational College of Industry, Zibo 256414, China

• https://orcid.org/0009-0006-3034-3129

autor

Li Yanhua

• School of Engineering Machinery, Hunan Sany Polytechnic College, Changsha 410129, China

• https://orcid.org/0009-0005-4894-4363

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