LISPEN, ENSAM, Arts et Métiers, campus de Lille, Lille, France
Date(s) : 15/12/2021 iCal
14 h 00 min - 15 h 00 min
This talk will address the design of the smallest and lightest bio-inspired man-made nano air vehicle. It shows two main original characteristics. Firstly, it is made in polymer materials and built using micro-machining processes, enabling to easily obtain parts of only several micrometers, a span smaller than 30 mm and a mass of 20 mg. Secondly, it is composed of a fully compliant structure, with no hinges, leading to use special vibration theory concepts to create high amplitude vibrations of the wings with the right kinematics to produce lift. In particular, the distributed stiffness and inertia of the wings is designed and optimized such that two vibration modes are combined in a quadrature phase shift. The talk will address our results on the design of the structure, the wing kinematics characterisation and lift measurements, the modelling of the nonlinear damping brought by the fluid structure interaction between the vibrating wings and the surrounding air, and the numerical estimation of the lift force.