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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

685
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.
Here, in order to determine the magnitude of velocity and acceleration for point...
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Relative Velocity in Two Dimensions01:11

Relative Velocity in Two Dimensions

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Relative velocity is the velocity of an object as observed from a particular reference frame, or the velocity of one reference frame with respect to another reference frame. The concept of relative velocity can be used to describe motion in two dimensions. Consider a particle P and two reference frames S and S′. The position of the origin of S′ as measured in S is , the position of P as measured in S′ is , and the position of P as measured in S is , which can be evaluated by utilizing...
8.8K
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...
510
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

676
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
676
Relative Velocity in One Dimension01:10

Relative Velocity in One Dimension

9.6K
The understanding of the concept of reference frames is essential to discuss relative motion in one or more dimensions. When we say that an object has a certain velocity, we must state the velocity with respect to a given reference frame. In most examples, this reference frame has been Earth. For instance, if a statement reads that a person is sitting in a train moving at 10 m/s east, then it implies that the person on the train is moving relative to the surface of Earth at this velocity,...
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Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

733
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
733

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Operation of the Collaborative Composite Manufacturing CCM System
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微型无人机在动态环境中的优化实时路径规划,辅助的是相互速度障碍算法.

Pengxiang Sun1, Wei Sun1, Wei Ding1

  • 1School of Geomatics, Liaoning Technical University, Fuxin, China.

PloS one
|November 17, 2025
PubMed
概括

本研究介绍了在复杂环境中自动驾驶微型无人机 (UAV) 的动态路径规划方法. 该方法确保了安全,高效和顺的飞行轨迹,减少了规划时间,适合实时任务.

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
  • 自主系统 自主系统

背景情况:

  • 自主微型无人机 (UAV) 需要在动态环境中进行高效的路径规划.
  • 机载计算约束限制了复杂场景中的实时性能.
  • 现有的方法与安全性,效率和计算需求作斗争.

研究的目的:

  • 为微型无人机提出动态路径规划方法.
  • 在计算限制下确保安全和实时性能.
  • 在复杂,动态的环境中实现高效的飞行任务.

主要方法:

  • 相互速度障碍算法用于动态路径规划.
  • 速度障碍球形冠 (VOSC) 模型用于定义安全速度边界.
  • 对于平滑的轨迹而言,最小偏移角度重新规划策略.
  • 针对多重障碍场景的基于临界曲线的避免方案.

主要成果:

  • 与传统方法相比,大大减少了规划时间.
  • 增强了轨迹的平滑性和动态可行性.
  • 在微型无人机硬件上成功在线执行.
  • 在多重障碍场景中表现出稳健性.

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结论:

  • 拟议的方法使得安全有效的自主微型无人机导航成为可能.
  • 这种方法适用于实时应用,如仓库导航和城市交通.
  • VOSC模型和临界曲线方案增强了避障能力.