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相关概念视频

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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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...
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The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
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Understanding the movement of a rigid body in planar motion involves recognizing that every particle within this body is traversing a path that maintains a consistent distance from a specific plane. This concept is fundamental in the study of physics and mechanical engineering, and it allows us to comprehend better how objects move in space.
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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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When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
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在多障碍狭窄环境中改进了RRT*-Connect操纵器路径规划.

Xueyi He1,2, Yimin Zhou2, Haonan Liu1,2

  • 1School of Mechanical and Control Engineering, Guilin University of Technology, Guilin 541006, China.

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|April 26, 2025
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概括

本研究介绍了一种改进的RRT*-Connect算法,用于在复杂环境中高效地规划机器人手臂路径. 新方法显著减少了操纵器操作的规划时间和路径成本.

关键词:
在RRT*-Connect上使用.适应式的步骤大小.启发式抽样策略 启发式抽样策略节点拒绝策略 节点拒绝策略路径规划路径规划路径规划机器人手臂是一个机器人.

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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
  • 运动规划 运动规划

背景情况:

  • 在狭窄,充满障碍的环境中,机器人手臂路径规划带来了重大的计算挑战.
  • 现有的算法在复杂的场景中经常与效率和最佳性作斗争.

研究的目的:

  • 提出一个改进的快速探索随机树星连接 (IRRT*-Connect) 算法,用于增强机器人手臂路径规划.
  • 解决在杂乱环境中采样效率,搜索加速和路径最佳性的局限性.

主要方法:

  • 实施了启发式采样策略,整合了圆形子集和目标偏差采样,以压缩搜索空间.
  • 引入了适应性步骤大小和节点拒绝策略,用于加速,无碰撞的路径生成.
  • 应用立方非均的B-spline插值用于路径平滑和修剪优化以删除多余的节点.

主要成果:

  • 与现有的算法相比,IRRT*-Connect显示了较短的规划时间.
  • 拟议的方法实现了机器人操纵器操作的较低路径成本.
  • 在Python/ROS中的成功模拟和UR5机器人臂上的物理实验验证实了这一方法.

结论:

  • 在具有挑战性的环境中,IRRT*-Connect算法为机器人手臂路径规划提供了显著的改进.
  • 增强的采样和搜索策略有助于更快,更优的路径生成.
  • 这项工作为需要高效的运动规划的现实世界机器人应用提供了强大的解决方案.