Journal
JOURNAL OF FLUIDS AND STRUCTURES
Volume 38, Issue -, Pages 238-254Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jfluidstructs.2012.12.006
Keywords
Floquet multipliers; Aeroelastic tailoring; Flexible flapping wings; Flight dynamics
Categories
Funding
- Air Force Office of Scientific Research [09RB01COR, 03VA01COR]
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This paper investigates the nonlinear dynamics of a vehicle with two flexible flapping wings. The body dynamics and the wings' deformation are monolithically grouped into a single system of equations, with aerodynamics accounted for by a quasi-steady blade element method. A periodic shooting method is then used to locate closed orbits of this non-autonomous system, and Floquet multipliers assess the linearized stability about the nonlinear orbit. This framework is then exposed to a gradient based optimizer, in order to quantify the role of wing planform variables, wing structure variables, and kinematic actuation variables in obtaining vehicles with superior open-loop stability characteristics, and/or low-power requirements. Published by Elsevier Ltd.
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