Asymmetric Studies with Complex Mechanical Systems

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: closed (30 June 2024) | Viewed by 1515

Special Issue Editors


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Guest Editor
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
Interests: deep transfer learning; federated learning; signal processing; fault diagnosis
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Engineering, University of Cambridge, Cambridge, UK
Interests: condition monitoring; reliability; machine learning
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: mahcine diagnostics and prognostics; signal processing; sparse representation; machine learning

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Guest Editor
School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Interests: signal processing; fault diagnosis and prognosis; vibration analysis and suppression
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Asymmetry analysis is a crucial aspect of mechanical engineering that helps in identifying and diagnosing faults in machines. By studying the asymmetrical characteristics of a mechanical system, engineers can pinpoint the root cause of issues such as unbalance, misalignment, and faults of motors, bearings, etc. With the advent of modern technology, the complexity of mechanical systems has increased, making it more challenging to detect and predict faults accurately.

Machine learning has emerged as a powerful tool for asymmetric analysis in mechanical fault detection and diagnosis. By leveraging the power of artificial intelligence, engineers can train machines to identify patterns and anomalies in data, making it easier to detect faults in real time. The integration of machine learning with cloud computing and Industry 4.0 technologies has opened up new possibilities for improving the accuracy and efficiency of fault diagnosis in complex systems.

Topics may include, but are not limited to:

  • Asymmetry analysis of mechanical systems;
  • Abnormal detection;
  • Intelligent diagnosis;
  • Fault prognosis;
  • Real-time monitoring;
  • Predictive maintenance.

Dr. Zhuyun Chen
Dr. Borong Hu
Dr. Yun Kong
Dr. Minghui Hu
Guest Editors

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Keywords

  • asymmetry analysis
  • abnormal detection
  • condition monitoring
  • artificial intelligence

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Published Papers (1 paper)

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Research

17 pages, 4609 KiB  
Article
Improved Vibration Signal Models of Localized Faults of Sun Gears to Predict Modulation
by Xiaoqing Yang, Gang Yang, Qiang Zeng, Canyi Du, Xiangkun Zeng, Feifei Yu and Zhuyun Chen
Symmetry 2023, 15(9), 1621; https://doi.org/10.3390/sym15091621 - 22 Aug 2023
Viewed by 1048
Abstract
The vibration modulation of the localized faults of sun gears is complicated because of the structure and motion features of planetary gearboxes. It is challenging to completely determine the vibration modulation mechanism. To address this issue, the influences of fluctuations in speed on [...] Read more.
The vibration modulation of the localized faults of sun gears is complicated because of the structure and motion features of planetary gearboxes. It is challenging to completely determine the vibration modulation mechanism. To address this issue, the influences of fluctuations in speed on the factors that affect vibration like the transfer path function, time-varying projection function, and meshing force were studied. Improved vibration amplitude and frequency modulation models were then established by combining the factors affecting vibration considering the speed fluctuations caused by the localized faults of sun gears. Regarding the features of vibration modulation of localized faults of sun gears, we concluded that both fault feature frequency and carrier rotational frequency modulate the harmonics of the meshing frequency, which form two groups of modulation sidebands. In addition, the harmonics of the fault feature frequency over the whole frequency range are modulated by the rotational frequency of the carrier, which is more dominant in the resonance domain. The experimental results of localized faults of sun gears strongly agree with those deduced using the proposed models. This research contributes an effective frequency indicator that can be used to confirm the condition of planetary gearboxes. Full article
(This article belongs to the Special Issue Asymmetric Studies with Complex Mechanical Systems)
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