和边界允许快速逃脱,穿过一个被分散的障碍物所覆盖的草原
Francesco Righini1, Marina Carpineti1, Fabio Giavazzi2
1Dipartimento di Fisica A. Pontremoli, Università degli Studi di Milano, 20133 Milano, Italy.
Royal Society open science
|September 15, 2023
概括
脚,四足步行是一种有效的逃生策略,在障碍丰富的环境中. 这种独特的跳跃行为最大限度地提高了成功的障碍谈判时间,为机器人探索提供了洞察力.
科学领域:
- 生物力学 生物力学
- 动物的运动 动物的运动.
- 机器人技术 机器人技术 机器人技术
背景情况:
- 腿是一种四足跳跃行为,在一些类动物中观察到,特别是在有障碍的草原上.
- 现有的刺假设,如诚实的信号或警告警报,缺乏确的证据.
- 与环境复杂性相关的穿刺的功能意义仍然不太清楚.
研究的目的:
- 为了研究在障碍丰富的环境中穿刺的动力学原理和功能优势.
- 为了确定在哪些条件下,穿刺可以作为最佳逃生策略.
- 探索探对开发用于地形导航的自主机器人系统的影响.
主要方法:
- 一个二维模拟模型被开发出来,用于分析一个带有随机分散障碍物的景观上的动动力学.
- 该研究侧重于障碍物密度和高度分布,以评估步行效率.
- 对不同的步态来说,在最短的时间内成功穿越障碍物的概率被计算出来.
主要成果:
- 当障碍物密度超过关键值时,在最短的时间内最大限度地超越障碍物的概率时,pronking成为最佳步态.
- 这种行为代表了由简单的开放循环控制驱动的有效逃生策略.
- 从向常规步态的转变 (步,冲) 取决于障碍物密度和高度分布,呈现连续或离散的变化.
结论:
- 冲刺是一种适应性移动策略,通过优化在具有挑战性的地形上障碍物谈判来增强生存.
- 这项研究提供了对刺作为逃生机制有效性的定量理解.
- 这些发现有直接应用,用于设计强大的自主机器人,能够在非结构化和混乱的环境中导航.
相关概念视频
00:53Migration
8.0K
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
8.0K
01:16Hydraulic Jump: Problem Solving
83
To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
83
01:29Hydraulic Jump
112
A hydraulic jump is a sudden rise in fluid depth in open channels, occurring when high-velocity (supercritical) flow transitions to low-velocity (subcritical) flow. This phenomenon requires an upstream Froude number greater than 1, as flows with Fr1<1 remain subcritical, making a hydraulic jump impossible due to the need for negative head loss, which violates thermodynamic principles.The characteristics of a hydraulic jump depend on the upstream Froude number and are classified as...
112
01:00Elastic Collisions: Introduction
12.9K
An elastic collision is one that conserves both internal kinetic energy and momentum. Internal kinetic energy is the sum of the kinetic energies of the objects in a system. Truly elastic collisions can only be achieved with subatomic particles, such as electrons striking nuclei. Macroscopic collisions can be very nearly, but not quite, elastic, as some kinetic energy is always converted into other forms of energy such as heat transfer due to friction and sound. An example of a nearly...
12.9K
01:15Elastic Collisions: Case Study
14.2K
Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
14.2K
01:17Rolling Resistance: Problem Solving
370
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
370