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Two modes resonant combined motion for insect wings kinematics reproduction and lift generation

Type
Articles dans des revues avec comité de lecture
Author
FAUX, Damien
244746 Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 [IEMN-DOAE]
THOMAS, Olivier
543315 Laboratoire d’Ingénierie des Systèmes Physiques et Numériques [LISPEN]
CATTAN, Eric
1296 Institut d’Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520 [IEMN]
GRONDEL, Sébastien
1296 Institut d’Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520 [IEMN]

URI
http://hdl.handle.net/10985/15359
DOI
10.1209/0295-5075/121/66001
Date
2018
Journal
EPL (Europhysics Letters)

Abstract

This paper presents an original concept using a two resonant vibration modes combined motion to reproduce insect wings kinematics and generate lift. The key issue is to design the geometry and the elastic characteristics of artificial wings such that a combination of flapping and twisting motions in a quadrature phase shift could be obtained. This qualitatively implies to bring the frequencies of the two resonant modes closer. For this purpose, a polymeric prototype was micromachined with a wingspan of 3 cm, flexible wings and a single actuator. An optimal wings configuration was determined with a modeling and validated through experimental modal analyses to verify the proximity of the two modes frequencies. A dedicated lift force measurement bench was developed and used to demonstrate a lift force equivalent to the prototype weight. Finally, at the maximum lift frequency, high-speed camera measurements confirmed a kinematics of the flexible wings with flapping and twisting motions in phase quadrature as expected.

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