Dynamic simulation and optimization of artificial insect-sized flapping wings for a bioinspired kinematics using a two resonant vibration modes combination

Damien Faux (1) , Olivier Thomas (2) , Sébastien Grondel (1, 3, 4, 5) , Eric Cattan (1, 4)

1 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
2 LISPEN - Laboratoire d’Ingénierie des Systèmes Physiques et Numériques
3 IEMN-DOAE - Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520
4 MAMINA - IEMN - Matériaux et Acoustiques pour MIcro et NAno systèmes intégrés - IEMN
5 INSA Hauts-De-France - INSA Institut National des Sciences Appliquées Hauts-de-France

This paper addresses the design of the elastic structure of artificial wings to optimize their dynamical behaviour to reproduce insect wings kinematics. Our bioinspired kinematics is based on the original concept of using the resonant properties of the wing structure in order to combine the motion of two vibration modes, a flapping and a twisting mode, in a quadrature phase shift. Oneway of achieving this particular combination is to optimize the geometry and elastic characteristics of the flexible structure such that the two modes are successive in the eigenspectrum and close in frequency. This paper first proposes a semi-analytical model, based on assembled Euler-Bernoulli beams, to understand, compute and optimize the artificial wing dynamic vibrations. Then, using this model, it is shown that it is possible to obtain several artificial wing structures with a flapping and a twisting mode close in frequency. Finally, experimental validations are performed on micromachined insect-sized prototypes to validatethe model and the concept.

Mots clés: Condensed Matter Physics; Mechanical Engineering; Acoustics and Ultrasonics; Mechanics of Materials

Domaines: Mécanique des structures [physics.class-ph]; Sciences de l'ingénieur [physics]; Acoustique [physics.class-ph]; Matériaux; Vibrations [physics.class-ph]; Micro et nanotechnologies/Microélectronique

Damien Faux, Olivier Thomas, Sébastien Grondel, Eric Cattan. Dynamic simulation and optimization of artificial insect-sized flapping wings for a bioinspired kinematics using a two resonant vibration modes combination. Journal of Sound and Vibration, 2019, 460, pp.114883. ⟨10.1016/j.jsv.2019.114883⟩. ⟨hal-02292288⟩