Abstract
Based on the acquired length and angle data of bat skeletons, a four-degree freedom robotic bat wing and an identical computational model with flap, sweep, elbow and wrist motions were presented. By considering the digits motions, a biomimetic bat skeleton model with seven-degree freedom was established as well. The effects of frequency, amplitude and downstroke ratio, as well as the components of inertial power and force on different directions, were studied. The experimental and computational results indicated that the inertial power and force accounted for the largest part on flap direction, the wing fold during upstroke could reduce the inertial power and force.
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