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Proceedings Paper

Optimal design of tendon-actuated morphing structures: nonlinear analysis and parallel algorithm
Author(s): Smita Bharti; Mary Frecker; George Lesieutre; Deepak Ramrakhyani
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Paper Abstract

The idea of a morphing aircraft wing has generated considerable interest in recent years. Such a structure has inherent advantages of possessing high maneuverability and efficiency under different flight conditions such as take off, cruise and loiter. The current focus is on achieving continuous wing shape change, as opposed to discrete, in order to help reduce drag. This research aims to achieve continuous wing morphing by employing a wing structure comprising of an optimized internal layout of cables and struts. Cables are employed as actuators while struts provide rigidity to the wing. In addition to achieving continuous morphing by changing cable length, this structure has the advantage of being light in weight. The focus of this paper is on obtaining an optimized cable and strut layout in the body of the wing. Non-linear Finite Element Analysis (FEA) has been performed to account for the large deflection requirements. An objective function that considers deflection under actuation and air loads has been incorporated. Results comparing linear and non-linear FEA are presented for a particular wing design. The nonlinear finite element is found to be effective when using large actuation forces.

Paper Details

Date Published: 19 May 2005
PDF: 12 pages
Proc. SPIE 5757, Smart Structures and Materials 2005: Modeling, Signal Processing, and Control, (19 May 2005); doi: 10.1117/12.601088
Show Author Affiliations
Smita Bharti, The Pennsylvania State Univ. (United States)
Mary Frecker, The Pennsylvania State Univ. (United States)
George Lesieutre, The Pennsylvania State Univ. (United States)
Deepak Ramrakhyani, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 5757:
Smart Structures and Materials 2005: Modeling, Signal Processing, and Control
Ralph C. Smith, Editor(s)

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