Design and Performance Evaluation of a Rotary Magnetorheological Damper for Unmanned Vehicle Suspension SystemsReport as inadecuate

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The Scientific World JournalVolume 2013 2013, Article ID 894016, 10 pages

Research Article

School of Mechanical Engineering, Pusan National University, Jangjeon-dong, Geumjeong-gu, Busan 609-732, Republic of Korea

Suspension Systems Engineering Team, Doosan Corporation Mottrol, 456-3 Nae-dong, Seongsan-gu, Changwon, Gyeongnam 642-050, Republic of Korea

Received 15 January 2013; Accepted 5 February 2013

Academic Editors: U. Lee and A. K. Saha

Copyright © 2013 Jae-Hoon Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We designed and validated a rotary magnetorheological MR damper with a specified damping torque capacity, an unsaturated magnetic flux density MFD, and a high magnetic field intensity MFI for unmanned vehicle suspension systems. In this study, for the rotary type MR damper to have these satisfactory performances, the roles of the sealing location and the cover case curvature of the MR damper were investigated by using the detailed 3D finite element model to reflect asymmetrical shapes and sealing components. The current study also optimized the damper cover case curvature based on the MFD, the MFI, and the weight of the MR damper components. The damping torques, which were computed using the characteristic equation of the MR fluid and the MFI of the MR damper, were 239.2, 436.95, and 576.78 N·m at currents of 0.5, 1, and 1.5 A, respectively, at a disk rotating speed of 10 RPM. These predicted damping torques satisfied the specified damping torque of 475 N·m at 1.5 A and showed errors of less than 5% when compared to experimental measurements from the MR damper manufactured by the proposed design. The current study could play an important role in improving the performance of rotary type MR dampers.

Author: Jae-Hoon Lee, Changwan Han, Dongsu Ahn, Jin Kyoo Lee, Sang-Hu Park, and Seonghun Park



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