Goyal Pulkit, van Leeuwen Johan L, Muijres Florian T
Experimental Zoology Group, Wageningen University and Research, P.O. Box 338, 6700 AH, Wageningen, the Netherlands.
iScience. 2022 Apr 16;25(5):104265. doi: 10.1016/j.isci.2022.104265. eCollection 2022 May 20.
Many flying animals parse visual information to control their landing, whereby they can decelerate smoothly by flying at a constant radial optic expansion rate. Here, we studied how bumblebees () use optic expansion information to control their landing, by analyzing 10,005 landing maneuvers on vertical platforms with various optic information, and at three dim light conditions. We showed that bumblebees both decelerate and accelerate during these landings. Bumblebees decelerate by flying at a constant optic expansion rate, but they mostly accelerate toward the surface each time they switched to a new, often higher, optic expansion rate set-point. These transient acceleration phases allow bumblebees to increase their approach speed, and thereby land rapidly and robustly, even in dim twilight conditions. This helps explain why bumblebees are such robust foragers in challenging environmental conditions. The here-proposed sensorimotor landing control system can serve as bio-inspiration for landing control in unmanned aerial vehicles.
许多飞行生物通过解析视觉信息来控制着陆，借此它们能够以恒定的径向视觉扩展速率飞行从而平稳减速。在此，我们通过分析在具有各种视觉信息的垂直平台上以及三种昏暗光照条件下的10005次着陆动作，研究了大黄蜂如何利用视觉扩展信息来控制着陆。我们发现大黄蜂在这些着陆过程中既有减速也有加速。大黄蜂通过以恒定的视觉扩展速率飞行来减速，但每次切换到新的、通常更高的视觉扩展速率设定点时，它们大多会朝着表面加速。这些短暂的加速阶段使大黄蜂能够提高其接近速度，从而即使在昏暗的暮色条件下也能快速且稳健地着陆。这有助于解释为什么大黄蜂在具有挑战性的环境条件下是如此强大的觅食者。这里提出的感觉运动着陆控制系统可作为无人机着陆控制的生物灵感来源。
