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Proceedings Paper

Experimental validation of a novel stictionless magnetorheological fluid isolator
Author(s): Shawn P. Kelso; Keith K. Denoyer; Ross M. Blankinship; Kenneth Potter; Jason E. Lindler
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Paper Abstract

Magnetorheological (MR) fluid damper design typically constitutes a piston/dashpot configuration. During reciprocation, the fluid is circulated through the device with the generated pressure providing viscous damping. In addition, the damper is also intended to accommodate off-axis loading; i.e., rotation moments and lateral loads orthogonal to the axis of operation. Typically two sets of seals, one where the piston shaft enters and exits the device and one between the piston and the cylinder wall, maintain alignment of the damper and seal the fluid from leaking. With MR fluid, these seals can act as sources of non-linear friction effects (stiction) and oftentimes possess a shorter lifespan due to the abrasive nature of the ferrous particles suspended in the fluid. Intelligently controlling damping forces must also accommodate the non-linear stiction behavior, which degrades performance. A new, unique MR fluid isolator was designed, fabricated and tested that directly addresses these concerns. The goal of this research was the development of a stiction-free MR isolator whose damping force can be predicted and precisely controlled. This paper presents experimental results for a prototype device and compares those results to model predictions.

Paper Details

Date Published: 31 July 2003
PDF: 12 pages
Proc. SPIE 5052, Smart Structures and Materials 2003: Damping and Isolation, (31 July 2003); doi: 10.1117/12.483966
Show Author Affiliations
Shawn P. Kelso, CSA Engineering, Inc. (United States)
Keith K. Denoyer, CSA Engineering, Inc. (United States)
Ross M. Blankinship, CSA Engineering, Inc. (United States)
Kenneth Potter, CSA Engineering, Inc. (United States)
Jason E. Lindler, CSA Engineering, Inc. (United States)

Published in SPIE Proceedings Vol. 5052:
Smart Structures and Materials 2003: Damping and Isolation
Gregory S. Agnes; Kon-Well Wang, Editor(s)

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