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Proceedings Paper

Dynamic characteristics and modeling of a new magnetorheological damper for broadband vibration control
Author(s): Fengchen Tu; Zhaobo Chen; Hua Li; Yinghou Jiao; Bo Fang
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Paper Abstract

Magnetorheological (MR) dampers are smart devices characterized as high damping force, short response time and lower energy consumption. They provide a promising way for vehicle isolation. However, transmissibility of conventional MR damper increases significantly at high frequency because of stiffness hardening. For this reason, new MR damper with decoupling mechanism has been designed. The design is sensitive to amplitude and frequency of vibration, and produces stiffness and damping varied with amplitudes and frequencies vibrations. Dynamic model is derived based on Bingham model. Mathematical expressions of dynamic characteristics, including dynamic stiffness, delay angle, force transmission rate and dynamic range of damping force, are deducted by solving the models. Numerical simulations are used to study the dynamic characteristics. The results indicate that, the design produces large damping force in the low frequency high amplitude case and small damping force low stiffness in the opposite case. The high frequency stiffness hardening is avoided. This MR damper can be used to semi-active vibration control of vehicles.

Paper Details

Date Published: 1 November 2007
PDF: 8 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 642362 (1 November 2007); doi: 10.1117/12.780368
Show Author Affiliations
Fengchen Tu, Harbin Institute of Technology (China)
Zhaobo Chen, Harbin Institute of Technology (China)
Hua Li, Harbin Institute of Technology (China)
Yinghou Jiao, Harbin Institute of Technology (China)
Bo Fang, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering
Shanyi Du; Jinsong Leng; Anand K. Asundi, Editor(s)

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