Superiority of Fault-Caused-Speed-Fluctuation-Based Dynamics Modeling: An Example on Planetary Gearbox with Cracked Sun Gear
A planetary gear fault generates periodic speed fluctuations, which significantly influence its vibration signal. It is a necessity to explore the vibration modulation features of gear faults to provide an effective indicator for fault detection. Therefore, a superior rigid-flexible coupling dynamic...
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MDPI AG
2025-06-01
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| Online Access: | https://www.mdpi.com/2075-1702/13/6/500 |
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| author | Xiaoqing Yang Guolin He Canyi Du Lei Xu Junjie Yu Haiyang Zeng Yanfeng Li |
| author_facet | Xiaoqing Yang Guolin He Canyi Du Lei Xu Junjie Yu Haiyang Zeng Yanfeng Li |
| author_sort | Xiaoqing Yang |
| collection | DOAJ |
| description | A planetary gear fault generates periodic speed fluctuations, which significantly influence its vibration signal. It is a necessity to explore the vibration modulation features of gear faults to provide an effective indicator for fault detection. Therefore, a superior rigid-flexible coupling dynamics model of a planetary gearbox involving the fault-caused speed fluctuation is developed, where the meshing stiffness under the impact of fault-caused speed fluctuation is innovatively deduced utilizing the potential energy method; then, the meshing stiffness is substituted into the rigid dynamics model to calculate the excitation forces. Transfer path functions from excitation locations to the sensor installed on the housing are obtained by considering the modal parameters of the flexible housing. Finally, the excitation forces are combined with their transfer path functions to calculate the vibration signal. The fault modulation features of the cracked sun gear deduced by the superior dynamics model emerge surrounding the meshing frequency and its harmonics, as well as the resonance ranges, which can be a reliable sign for identifying faults. The experiment conducted on a single-stage planetary gearbox confirms the validity and superiority of the proposed model, which holds significant value for guiding fault detection and prognosis in planetary gearboxes. |
| format | Article |
| id | doaj-art-4c6eeb08aba645b7900857a84d26162f |
| institution | Kabale University |
| issn | 2075-1702 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj-art-4c6eeb08aba645b7900857a84d26162f2025-08-20T03:27:23ZengMDPI AGMachines2075-17022025-06-0113650010.3390/machines13060500Superiority of Fault-Caused-Speed-Fluctuation-Based Dynamics Modeling: An Example on Planetary Gearbox with Cracked Sun GearXiaoqing Yang0Guolin He1Canyi Du2Lei Xu3Junjie Yu4Haiyang Zeng5Yanfeng Li6School of Automobile and Transportation Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, ChinaSchool of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaSchool of Automobile and Transportation Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, ChinaSchool of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, ChinaSchool of Automobile and Transportation Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, ChinaSchool of Automobile and Transportation Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, ChinaSchool of Automobile and Transportation Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, ChinaA planetary gear fault generates periodic speed fluctuations, which significantly influence its vibration signal. It is a necessity to explore the vibration modulation features of gear faults to provide an effective indicator for fault detection. Therefore, a superior rigid-flexible coupling dynamics model of a planetary gearbox involving the fault-caused speed fluctuation is developed, where the meshing stiffness under the impact of fault-caused speed fluctuation is innovatively deduced utilizing the potential energy method; then, the meshing stiffness is substituted into the rigid dynamics model to calculate the excitation forces. Transfer path functions from excitation locations to the sensor installed on the housing are obtained by considering the modal parameters of the flexible housing. Finally, the excitation forces are combined with their transfer path functions to calculate the vibration signal. The fault modulation features of the cracked sun gear deduced by the superior dynamics model emerge surrounding the meshing frequency and its harmonics, as well as the resonance ranges, which can be a reliable sign for identifying faults. The experiment conducted on a single-stage planetary gearbox confirms the validity and superiority of the proposed model, which holds significant value for guiding fault detection and prognosis in planetary gearboxes.https://www.mdpi.com/2075-1702/13/6/500fault-caused speed fluctuationsuperior dynamics modelcracked sun gearvibration modulation features |
| spellingShingle | Xiaoqing Yang Guolin He Canyi Du Lei Xu Junjie Yu Haiyang Zeng Yanfeng Li Superiority of Fault-Caused-Speed-Fluctuation-Based Dynamics Modeling: An Example on Planetary Gearbox with Cracked Sun Gear Machines fault-caused speed fluctuation superior dynamics model cracked sun gear vibration modulation features |
| title | Superiority of Fault-Caused-Speed-Fluctuation-Based Dynamics Modeling: An Example on Planetary Gearbox with Cracked Sun Gear |
| title_full | Superiority of Fault-Caused-Speed-Fluctuation-Based Dynamics Modeling: An Example on Planetary Gearbox with Cracked Sun Gear |
| title_fullStr | Superiority of Fault-Caused-Speed-Fluctuation-Based Dynamics Modeling: An Example on Planetary Gearbox with Cracked Sun Gear |
| title_full_unstemmed | Superiority of Fault-Caused-Speed-Fluctuation-Based Dynamics Modeling: An Example on Planetary Gearbox with Cracked Sun Gear |
| title_short | Superiority of Fault-Caused-Speed-Fluctuation-Based Dynamics Modeling: An Example on Planetary Gearbox with Cracked Sun Gear |
| title_sort | superiority of fault caused speed fluctuation based dynamics modeling an example on planetary gearbox with cracked sun gear |
| topic | fault-caused speed fluctuation superior dynamics model cracked sun gear vibration modulation features |
| url | https://www.mdpi.com/2075-1702/13/6/500 |
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