A tunable hybrid damper with Coulomb friction and electromagnetic shunt damping

Ruqi Sun, Waion Wong, Li Cheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review


Vibration dampers with tunable properties are of practical significance to accommodate the need of vibration control under different circumstances. Among major parameters, tunable damping to deliver required accuracy within a given frequency range is difficult to achieve in practice. This paper proposes a hybrid tunable damper by combining the advantages of both Coulomb friction damping and electromagnetic shunt damping. The tunable friction damper (FD) allows for coarse tuning with a larger tunable range, while the tunable electromagnetic shunt damper (EMSD) functions as a fine tuner with fine precision. The end result is a significantly increased tunable frequency range with high precision. The proposed method allows for simple and low cost adjustment of the damping forces in both dampers. A prototype is fabricated and experimentally tested in a dynamic vibration absorber (DVA) system. The predicted tenability is experimentally verified and H optimal damping of the DVA is readily achieved by using the proposed hybrid damper.

Original languageEnglish
Article number116778
JournalJournal of Sound and Vibration
Publication statusPublished - 28 Apr 2022


  • Coulomb friction damping
  • Dynamic vibration absorber
  • Electromagnetic shunt damping
  • Tunable hybrid damper

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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