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The aim of this investigation was to study the feasibility of a novel nonlinear magnetic shock absorber in road vehicle applications. This shock absorber consists of an array of identical permanent repelling magnets with surrounding electromagnetic coils as a source of energy dissipation. The magnetic shock absorber was implemented in a quarter car model and its nonlinear dynamics were developed analytically. The developed model was implemented in a simulation environment and the results were validated using a quarter car experimental setup. The ride quality and performance of the novel magnetic shock absorber were evaluated and also compared to a conventional linear one utilizing the ISO 2631 standard. In response to a continuous rough road surface, the performance of the magnetic shock absorber was shown to be similar to the linear one. Further, the road holding capabilities were demonstrated to be superior in the case of the former. As an additional advantage, the magnetic shock absorber could be utilized to harvest the kinetic mechanical energy of the vertical response. The proposed concept can also be used in developing an active suspension through energization of the coils.

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Analytical and Experimental Investigation of the Potential for Using Novel Nonlinear Magnetic Shock Absorbers in Ground Vehicle Applications

  • 会议论文

  • 发表日期：

    2025年

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  • Amirhossein Daliri Shadbad,
  • Fidel Khouli,
  • Robert G. Langlois,
  • Fred F. Afagh

摘要

The aim of this investigation was to study the feasibility of a novel nonlinear magnetic shock absorber in road vehicle applications. This shock absorber consists of an array of identical permanent repelling magnets with surrounding electromagnetic coils as a source of energy dissipation. The magnetic shock absorber was implemented in a quarter car model and its nonlinear dynamics were developed analytically. The developed model was implemented in a simulation environment and the results were validated using a quarter car experimental setup. The ride quality and performance of the novel magnetic shock absorber were evaluated and also compared to a conventional linear one utilizing the ISO 2631 standard. In response to a continuous rough road surface, the performance of the magnetic shock absorber was shown to be similar to the linear one. Further, the road holding capabilities were demonstrated to be superior in the case of the former. As an additional advantage, the magnetic shock absorber could be utilized to harvest the kinetic mechanical energy of the vertical response. The proposed concept can also be used in developing an active suspension through energization of the coils.