Abstract
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 language | English |
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Article number | 116778 |
Journal | Journal of Sound and Vibration |
Volume | 524 |
DOIs | |
Publication status | Published - 28 Apr 2022 |
Keywords
- 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