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Science:姿势和摇摆控制蝴蝶的飞行

摘要 : 蝴蝶依靠慢慢地扇动大翅膀来飞翔——它们每秒约扇10次,比不上蜜蜂每秒扇200次。

 

蝴蝶依靠慢慢地扇动大翅膀来飞翔——它们每秒约扇10次,比不上蜜蜂每秒扇200次。一个新的模型展示了它们控制这种忽停忽动、漫不经心的飞行的方法,即良好的姿势,再加一点摇摆。关于蝴蝶的飞行的研究一直局限于研究拴在风洞里的蝴蝶,或者只注重水平运动的模拟。而在新研究中,研究人员给实验室中自由飞翔的枯叶蝶拍摄了高速视频,然后对它们不羁的飞行模式,连同因此产生的复杂气流进行了模拟。研究小组发现,同地面垂直的身体姿势帮助蝴蝶向上飞,特别是当这种姿势结合了伴随每次翅膀扇动出现的身体的大范围扭转。根据《物理评论快报E》上发表的一项研究,通过缓和这种摇摆或是身体的角度,蝴蝶可以向前飞而不是向上飞。研究人员说,蝴蝶的飞行或可为开发能用于监视和救援行动的小型飞行器提供一个好模型。像蜜蜂一样疯狂的飞虫是很难模仿的,而对未来的救援机器人来说,蝴蝶速度较慢且摇晃的飞行方式可能更易于管理。

原文链接:

Posture and waggle control butterfly flight

原文摘要:

Butterflies soar by using big wings and slow wingbeats—about 10 beats per second, compared with about 200 in honey bees. A new model shows how they control this jerky, erratic flight: good posture and a bit of waggle. Research on butterfly flight has been limited to studying tethered butterflies in wind tunnels, or simulations focusing only on horizontal motion. In the new study, researchers took high-speed videos of orange oakleaf butterflies free-flying in the lab, and then simulated their unruly flight patterns, along with the intricate air currents they produce. The team found that a body posture perpendicular to the ground helps the insects fly upward, especially when combined with a large rotation of their body timed with each flap of their wings. By toning down this waggle or the angle of their body, butterflies can move forward instead of upward, according to a study to be published in Physical Review Letters E. The researchers say that butterfly flight would make a good model for developing tiny flying vehicles that could be used for surveillance and rescue operations. Frenzied fliers like bees are hard to mimic, but a butterfly’s slower, waggling flight might be more manageable for the rescue robots of the future.

来源: Science 浏览次数:0

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