Dynamics and stability of directional jumps in the desert locust.
Dynamics and stability of directional jumps in the desert locust.
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作者：
Gvirsman O;Kosa G;Ayali A
蝗虫以其跳跃远距离以避免捕食的能力而闻名。这种跳跃还可以将成年蝗虫发射到空中，以便开始飞行。这一重要行为的各个方面已经得到了广泛的研究，从肌肉生理学和生物力学，到参与跳跃动力的能量储存系统等等。不太清楚的是参与控制跳跃轨迹的机制。在这里，我们利用视频监控和仔细分析的实验定向跳跃的成年沙漠蝗虫，连同动态的计算机模拟，以了解蝗虫如何控制的方向和高度的跳跃，剩余的角速度从跳跃和时间的扑翼飞行开始。我们的研究证实并扩展了关于初始身体位置和方向的工具作用的早期发现。真实跳跃视频分析和基于我们扩展的动力学模型的模拟都表明，初始身体位置坐标（相对于后腿地面接触点）在预测跳跃的方位角和仰角方面占主导地位。我们还报告了跳跃的俯仰角速度和飞行起始时间之间的强线性相关性，这样头部向下旋转导致更早的机翼打开。除了对蝗虫跳跃和飞行启动的生物力学原理提供重要见解外，这项研究的结果还将用于设计未来的生物启发微型跳跃机器人原型，该机器人将用于动物行为研究和环境监测应用。
Locusts are known for their ability to jump large distances to avoid predation. The jump also serves to launch the adult locust into the air in order to initiate flight. Various aspects of this important behavior have been studied extensively, from muscle physiology and biomechanics, to the energy storage systems involved in powering the jump, and more. Less well understood are the mechanisms participating in control of the jump trajectory. Here we utilise video monitoring and careful analysis of experimental directional jumps by adult desert locusts, together with dynamic computer simulation, in order to understand how the locusts control the direction and elevation of the jump, the residual angular velocities resulting from the jump and the timing of flapping-flight initiation. Our study confirms and expands early findings regarding the instrumental role of the initial body position and orientation. Both real-jump video analysis and simulations based on our expanded dynamical model demonstrate that the initial body coordinates of position (relative to the hind-legs ground-contact points) are dominant in predicting the jumps’ azimuth and elevation angles. We also report a strong linear correlation between the jumps’ pitch-angular-velocity and flight initiation timing, such that head downwards rotations lead to earlier wing opening. In addition to offering important insights into the bio-mechanical principles of locust jumping and flight initiation, the findings from this study will be used in designing future prototypes of a bio-inspired miniature jumping robot that will be employed in animal behaviour studies and environmental monitoring applications.
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受蝗虫跳跃启发的跳跃机器人仿生机构及运动学分析
影响因子：
4
作者：
Chen, Diansheng;Yin, Junmao;Wang, Tianmiao
通讯作者：
Wang, Tianmiao
DOI：
10.1007/bf00192653
发表时间：
1990-01-01
影响因子：
2.1
作者：
SOBEL, EC
通讯作者：
SOBEL, EC
影响因子：
3.4
作者：
Zaitsev, Valentin;Gvirsman, Omer;Kosa, Gabor
通讯作者：
Kosa, Gabor
影响因子：
2.8
作者：
Taylor, GK;Thomas, ALR
通讯作者：
Thomas, ALR
DOI：
10.1007/s00359-005-0023-3
发表时间：
2005-10-01
影响因子：
2.1
作者：
Santer, RD;Yamawaki, Y;Simmons, PJ
通讯作者：
Simmons, PJ