Damping and response characteristics of passive type MR damper

Takahiro Murakami, Michiya Sakai, Masami Nakano

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The characteristics of a passive type MR damper were evaluated experimentally. The damper has variable damping characteristics as well as an existing semi-active damper, although it is fully passive device without any sensor, power supply and power controller. A prototype of the damper was manufactured in order to verify the damping and response characteristics. The excitation tests with sinusoidal displacement demonstrate that the damping force changes in response to the sign of the product of the velocity and displacement, which is analogous to one of semi-active control. The base excitation tests with a single-degree-of-freedom system show that the passive type MR damper has excellent damping effect in a wide range of frequency. In particular, the advantage is noticeable at resonance frequency. It is also shown that the base isolation system with the present damper is quite effective in a reduction of the response to earthquake excitation.

Original languageEnglish
Pages (from-to)911-917
Number of pages7
JournalInternational Journal of Applied Electromagnetics and Mechanics
Issue number3-4
Publication statusPublished - 2010


  • Damping characteristics
  • Excitation test
  • MR damper
  • Magnetorheological fluid
  • Response characteristics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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