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Shock and Vibration
Volume 2016 (2016), Article ID 4184726, 12 pages
http://dx.doi.org/10.1155/2016/4184726
Research Article

Design, Analysis, and Experimental Evaluation of a Double Coil Magnetorheological Fluid Damper

School of Mechatronic Engineering, East China Jiaotong University, Nanchang, Jiangxi 330013, China

Received 25 May 2015; Revised 2 September 2015; Accepted 2 September 2015

Academic Editor: Rafał Burdzik

Copyright © 2016 Guoliang Hu 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.

Abstract

A magnetorheological (MR) damper is one of the most advanced devices used in a semiactive control system to mitigate unwanted vibration because the damping force can be controlled by changing the viscosity of the internal magnetorheological (MR) fluids. This study proposes a typical double coil MR damper where the damping force and dynamic range were derived from a quasistatic model based on the Bingham model of MR fluid. A finite element model was built to study the performance of this double coil MR damper by investigating seven different piston configurations, including the numbers and shapes of their chamfered ends. The objective function of an optimization problem was proposed and then an optimization procedure was constructed using the ANSYS parametric design language (APDL) to obtain the optimal damping performance of a double coil MR damper. Furthermore, experimental tests were also carried out, and the effects of the same direction and reverse direction of the currents on the damping forces were also analyzed. The relevant results of this analysis can easily be extended to the design of other types of MR dampers.