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Kagome-Based High Authority Shape Morphing Structure

[+] Author Affiliations
S. L. dos Santos e Lucato, R. M. McMeeking, A. G. Evans

University of California at Santa Barbara

Paper No. IMECE2004-60768, pp. 69-75; 7 pages
doi:10.1115/IMECE2004-60768
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Aerospace
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Aerospace Division
  • ISBN: 0-7918-4700-4 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

A concept for a high authority shape morphing plate is described and demonstrated. The design incorporates an active back-plane comprising a Kagome truss, capable of changing the shape of a solid face, connected to the back-plane by means of a tetrahedral truss core. The two shape deformations to be demonstrated consist of hinging and twisting. The design is performed by a combination of analytic estimation and numerical simulation, guided by previous assessments of the Kagome configuration. It is shown that, while the structure is capable of sustaining large passive loads at low weight, the demonstrable authority is actuator-limited. An optimization based on a genetic algorithm has been used to determine the best placement of a limited number of actuators in the structure for a given set of target shapes. The force capability of the actuators and failure threshold loads of the structure were ascertained in the optimization. Possible applications of such multi-shape morphing structures include ailerons and mirrors.

Copyright © 2004 by ASME
Topics: Shapes

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