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相关概念视频

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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Three-Dimensional Force System:Problem Solving01:30

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A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
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Uniform Depth Channel Flow: Problem Solving01:18

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To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...
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Turbulent Flow: Problem Solving01:09

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Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
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Equation of Motion: General Plane motion - Problem Solving01:16

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Consider a lawn roller with a mass of 100 kg, a radius of 0.2 meters, and a radius of gyration of 0.15 meters. A force of 200 N is applied to this roller, angled at 60 degrees from the horizontal plane. What will be the angular acceleration of the lawn roller?
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Collisions in Multiple Dimensions: Problem Solving01:06

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In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
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APPA-3D:在未知的复杂环境中用于无人机的自主3D路径规划算法.

Jintao Wang1,2, Zuyi Zhao3, Jiayi Qu3

  • 1Civil Aviation College, Shenyang Aerospace University, Shenyang, 110136, China. wangjintao@sau.edu.cn.

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|January 12, 2024
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本研究介绍了APPA-3D,这是一种算法,使无人机能够在未知的3D环境中自主规划无碰撞路径. 它在复杂,不可预测的环境中提高了无人机导航安全性和可靠性.

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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) 为复杂环境中的任务提供灵活性和成本效益.
  • 目前的无人机路径规划通常假定已知的环境,限制在未知区域的安全导航.
  • 自主无碰撞路径规划对于可靠的无人机操作至关重要.

研究的目的:

  • 为无人机在未知的复杂3D环境中 (APPA-3D) 提出一种自主无碰撞路径规划算法.
  • 提高无人机在不可预测条件下安全可靠地导航的能力.

主要方法:

  • 使用无人机碰撞安全信封和环境意识设计了防撞控制策略.
  • 开发了一种针对飞行环境的强化学习 (RL) 动态奖励功能.
  • 根据行动选择概率提出了一个优化的RL行动探索策略.
  • 利用一个改进的RL算法来训练和模拟在未知环境中的无人机飞行.

主要成果:

  • APPA-3D算法通过与模拟未知环境的交互进行训练.
  • 证明了无人机有效的自主无碰撞路径规划.
  • 进行比较实验证实APPA-3D能够在未知的复杂3D环境中引导无人机从开始安全地到达目标.

结论:

  • 在未知的复杂的3D环境中,APPA-3D可以为无人机实现自主,无碰撞的路径规划.
  • 该算法增强了无人机在不可预测的环境中可靠执行任务的能力.
  • 这项研究有助于更安全,更强大的无人机导航系统.