The design of the AEV is inspired from the polyhedral wings design in the aircrafts.
Polyhedral seems to be less common and mainly found in relatively old aircraft (F4 Phatom, F4U Corsair, DR400,…). By polyhedral, I mean at least 2 dihedral angle with a sharp discontinuity between both.
A polyhedral wing provides a compromise: a steep dihedral at the tip of the wing in order to maximize stability, and a shallower dihedral angle closer to the root in order to maximize lift. 
Therefore, a polyhedral wing allows the best of both worlds for a wing design. Other applications of a polyhedral wing are utilitarian; the gull wing on the Vaught F4U Corsair is designed so that the landing gear is positioned close to the ground while maintaining roll stability and aerodynamics.
Citation
https://www.researchgate.net/file.PostFileLoader.html?id…assetKey…
Andras Sobester, Alexander I J Forrester-Aircraft Aerodynamic. Design Geometry and Optimization-John Wiley &_ Sons (2014).pdf