ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Experimental Measurement and Force Analysis of a Fast Takeoff in Dronefly
Received date: 2014-01-07
Revised date: 2014-04-14
Online published: 2014-05-04
Supported by
National Natural Science Foundation of China (11232002); the "111" Project (B07009)
An experimental measurement of a fast takeoff in dronefly is projected and the force analysis is presented here. Wing and body kinematics of the insect during takeoff are measured using high-speed video techniques and the morphological data are recorded. Based on the measured data, the inertia force acting on the insect is computed and the aerodynamic force of the wings is calculated by the method of computational fluid dynamics (CFD). The leg force is determined according to force balance. In the takeoff, the stroke amplitude reaches a maximum value after two completed wingbeats, and after four wingbeats the wingbeat frequency stays constant and the insect is airborne. The leg force plays a primary role in the body raise movement and decreases the influence of aerodynamic force in horizontal and pitch motion, and decreases to zero when the insect is airborne. These indicate that droneflies get the ability to take off quickly to avoid predators using their legs, and the takeoff duration decreases compared with the voluntary takeoff. It is also an inspiration for the takeoff mode of man-made micro air vehicle (MAV).
Key words： dronefly; takeoff; kinematics; high speed video; aerodynamics; computational fluid dynamics; leg force
CHEN Maowei , SUN Mao . Experimental Measurement and Force Analysis of a Fast Takeoff in Dronefly[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(12) : 3222 -3231 . DOI: 10.7527/S1000-6893.2014.0056
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