Figure 2
From: Self-adaptive Bioinspired Hummingbird-wing Stimulated Triboelectric Nanogenerators
Wing aerodynamics modeling and experimental setup. (a) Wing geometry parameters and components of the total aerodynamic force in upstroke and downstroke. (b) The averaged trajectory of the wing tip in the XZ-plane. (c) Measuring setup inside the closed system wind tunnel while monitoring the wind speed values and the wind tunnel.
