Abstract
Dragonfly wing is deformed in the tip side from the nodus, which is vein structure unique to dragonfly. Wing deformation is thought to correspond to feathering motion in flapping flight. However, dragonflies perform a feathering motion actively. In this study, the effect of the nodus structure of wings on flapping flight with feathering motion was investigated using fluid-structure interaction analysis. Moreover, artificial wings with nodus structure were fabricated, and the flight test of micro air vehicle with artificial wings that mimic nodus was carried out. As a result, when the feathering angle is 20 deg or less, the nodus wings reduce drag force by deformation of wings and rise the efficiency of lift. In the flight test, micro air vehicle with artificial win gs that mimic nodus is successful in the takeoff and forward flight. Therefore, the nodus structure of a wing is of benefit to the flapping flight.
