Check-Valve Design in Enhancing Aerodynamic Performance of Flapping Wings

A flapping wing micro air vehicle (FWMAV) demands high lift and thrust generation for a desired payload. In view of this, the present work focuses on novel way enhancing characteristics through integrating check-valves in membrane. Modal analysis static are performed to determine natural frequency deformation check-valve. Based inference, check-valve opens closes during upstroke downstroke flapping, respectively. Wind tunnel experiments were conducted by considering two cases design, i.e., with without various driving voltages, wind speeds different inclined angles. 20 cm-wingspan polyethylene terephthalate (PET) membrane check-valves, composed central disc-cap radius 7.43 mm, supported three S-beams, actuated Evans mechanism have 90° stroke angle, is considered 10 gf (gram force) FWMAV study. The aerodynamic performances, such as net these cases, evaluated. experimental result demonstrates that an average 17 generated case where attached operate at 3.7 V input voltage, 30° angle 1.5 m/s speed. It inferred sufficient benefit 68% higher attained incorporated