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Preliminary Investigation of a Fishbone Active Camber Concept

[+] Author Affiliations
Benjamin King Sutton Woods, Michael I. Friswell

Swansea University, Swansea, UK

Paper No. SMASIS2012-8058, pp. 555-563; 9 pages
doi:10.1115/SMASIS2012-8058
From:
  • ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Volume 2: Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Bio-Inspired Materials and Systems; Energy Harvesting
  • Stone Mountain, Georgia, USA, September 19–21, 2012
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4510-3
  • Copyright © 2012 by ASME

abstract

This paper introduces a novel airfoil morphing structure known as the Fishbone Active Camber (FishBAC). This design employs a biologically inspired compliant structure to create large, continuous changes in airfoil camber and section aerodynamic properties. The structure consists of a thin chordwise bending beam spine with stringers branching off to connect it to a pre-tensioned Elastomeric Matrix Composite (EMC) skin surface. Actuators mounted in the D-spar induce bending moments on the spine through an antagonistic pair of tendons in a manner similar to natural musculature systems. Several potential morphing configurations using this concept are introduced. The paper then focuses on a trailing edge morph wherein the compliant spine connects a rigid leading edge D-spar to a solid trailing edge strip. The motivation for exploring this novel morphing architecture is established through analytical aerodynamic comparison to the NACA 0012 airfoil with and without a discrete trailing edge flap. A prototype device is built to explore various aspects of manufacturing this concept, and to prove the large deflection capability of the FishBAC.

Copyright © 2012 by ASME

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