Notice of RetractionNano Air Vehicle wing concepts design and experimental study of nano rotor hovering performance
Nano Air Vehicles (NAVs) were proposed as unmanned aerial robots to fulfill the missions in cluster environment. This study designs two types of wing concept as rotary wing and flapping wing for NAV based on the minimum energy loss theory and biologically inspired theory. The hovering performance of the two concepts is compared each other to demonstrate the concept superiority. And the experimental study of nano rotor hovering performance is carried out. A test bench with highly sensitive mechanism systems is designed in view of being able to measure the thrust and torque of nano-rotors simultaneously and response to the change of variables rapidly with sufficient accuracy. Then experimental and computational studies are performed with a micro brushless motor and a nano rotor. The results of concept design show that the flapping-wing concept is slightly more efficient than the rotary-wing concept base on the hovering power. The analysis of experimental and computational studies suggests that the motor efficiency and rotor efficiency degrade dramatically with the reduction of motor and rotor size.