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相关概念视频

Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

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Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
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Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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One-Degree-of-Freedom System01:24

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In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

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Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
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Laminar Flow: Problem Solving01:24

Laminar Flow: Problem Solving

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Laminar flow occurs when a fluid moves smoothly in parallel layers with minimal mixing and turbulence. In fluid mechanics, ensuring laminar flow within a pipe is essential for precise control of flow characteristics, especially in engineering applications. The key factor in determining whether flow remains laminar is the Reynolds number, a dimensionless quantity that depends on the fluid's velocity, density, viscosity, and the pipe's diameter. A Reynolds number of 2100 or lower...
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In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
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Updated: Jul 25, 2025

Electroantennography-based Bio-hybrid Odor-detecting Drone using Silkmoth Antennae for Odor Source Localization
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使用LiDAR传感器融合的自主空中避难障碍使用LiDAR传感器.

Qing Liang1, Zilong Wang1, Yafang Yin1

  • 1School Of Electronic Engineering, Xi'an University Of Posts And Telecommunications, Xi'an, Shaanxi Province, China.

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概括

本研究提出了一种三模块方法,用于无人驾驶飞行器 (UAV) 使用光探测和距离 (LiDAR) 和矢量场直方图 (VFH) 算法来避免障碍,以便在复杂的环境中安全导航.

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 人工智能的人工智能
  • 航空航天工程 航空航天工程

背景情况:

  • 无人驾驶飞行器 (UAV) 面临着在未知的环境中导航的挑战.
  • 对于无人机来说,安全和有效的避开障碍物至关重要,特别是在低空,复杂的环境中.

研究的目的:

  • 为无人机开发和验证一个强大的避难障碍方法.
  • 在未知和复杂的环境中实现安全的自主飞行.

主要方法:

  • 一种由三个模块组成的方法:环境感知,基于算法的障碍回避和运动控制.
  • 利用光探测和距离测定 (LiDAR) 进行环境传感.
  • 使用矢量场直方图 (VFH) 算法处理传感器数据并确定飞行速度.

主要成果:

  • 在3D模拟环境中成功演示了无人机在障碍物中避开障碍.
  • 拟议的方法使无人机能够合理而安全地避开障碍.
  • 验证了综合系统的有效性和可行性.

结论:

  • 拟议的三模块避障系统对无人机有效.
  • 集成LiDAR和VFH算法促进了自主导航.
  • 该方法对现实世界低海拔复杂环境应用具有前景.