イトトンボの飛行解析

概要

論文の詳細を見る
Free flights of a damselfly, Ceriagrion melanurum Selys, are filmed with a high speed video camera and analyzed on a personal computer based image processing system. The observed characteristics of the flight are : 1) The flight speed is rather low. lt ranges from 0.4m/s to 0.9m/s in our experiments. 2) The inclinations of the stroke planes are small. It is 10〜15 deg for the forewing and 0〜30 deg for the hindwing. 3) The flapping amplitude of the wing is almost twice as large as that of a dragonfly for the fore and hindwing respectively. 4) The phase difference between fore and hind pairs of wings is about -100 deg. lt is 60〜90 deg in the flight of a dragonfly. We use the Fourier analysis to make clear the beating mechanism of wings ; the flapping motion can be expressed by the first harmonic of a Fourier expansion series, while the higher harmonics were needed to simulate the feathering motion of the wing.
東京工芸大学の論文
1994-01-31