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Damping Flexure Mechanisms Using Low-Density, Low-Wave-Speed Media

[+] Author Affiliations
Kripa K. Varanasi

GE Global Research, Niskayuna, NY

Samir A. Nayfeh, Alexander H. Slocum

Massachusetts Institute of Technology, Cambridge, MA

Paper No. DETC2005-85448, pp. 111-119; 9 pages
doi:10.1115/DETC2005-85448
From:
  • ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 7: 29th Mechanisms and Robotics Conference, Parts A and B
  • Long Beach, California, USA, September 24–28, 2005
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4744-6 | eISBN: 0-7918-3766-1
  • Copyright © 2005 by ASME

abstract

Lightly damped poles and zeros in the response of flexure-based servomechanisms often limit their dynamic performance. In this paper, we measure the frequency response of a single-and a double-parallelogram flexure stage coupled to low-density, low-wave-speed foams in various configurations, and find that addition of the foam yields relatively high damping of in-plane, out-of-plane, and higher-order resonances. At frequencies high enough for waves to propagate into the foam, strong interactions between the foam and flexure structure occur, giving rise to a great deal of damping. This is a promising method for improvement of the dynamic performance of positioning and constraint systems that employ flexures.

Copyright © 2005 by ASME

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