Stability and power optimality in time-periodic flapping wing structures

作者：Stanford Bret^*; Beran Philip; Snyder Richard; Patil Mayuresh

来源：Journal of Fluids and Structures, 2013, 38: 238-254.

DOI：10.1016/j.jfluidstructs.2012.12.006

• Floquet multipliers
• Aeroelastic tailoring
• Flexible flapping wings
• Flight dynamics

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.

• 出版日期2013-4