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<p>Flexible thin-walled bearing (FTB) is the core component of harmonic drives. FTB can be transformed into flexible thin-walled elliptical bearing (FTEB) through cam-induced deformation, which induces dynamic characteristics significantly different from conventional bearings. In this paper, a comprehensive model incorporating the specific characteristics of the FTEB is established. The kinematics and load distribution of FTEB are studied and the radial vibration and instantaneous angular speed (IAS) are investigated through dynamic simulations. Moreover, the experiment validates the effectiveness of the dynamic simulation. The specific impacts of axis alternation caused by the cam are identified, and the modulation phenomenon between the frequency of alternating axes and outer ring fault characteristic frequency of FTEB is revealed, providing a basis for FTEB fault diagnosis.</p>

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Dynamic modeling of flexible thin-walled ellipse bearing outer ring fault considering cam disturbance

  • 期刊论文

  • 发表日期：

    2025年9月18日

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  • Bowei Wang,
  • Qiuhai Liu,
  • Bin Pang,
  • Jin Xu

摘要

Flexible thin-walled bearing (FTB) is the core component of harmonic drives. FTB can be transformed into flexible thin-walled elliptical bearing (FTEB) through cam-induced deformation, which induces dynamic characteristics significantly different from conventional bearings. In this paper, a comprehensive model incorporating the specific characteristics of the FTEB is established. The kinematics and load distribution of FTEB are studied and the radial vibration and instantaneous angular speed (IAS) are investigated through dynamic simulations. Moreover, the experiment validates the effectiveness of the dynamic simulation. The specific impacts of axis alternation caused by the cam are identified, and the modulation phenomenon between the frequency of alternating axes and outer ring fault characteristic frequency of FTEB is revealed, providing a basis for FTEB fault diagnosis.