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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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Relative Motion Analysis using Rotating Axes01:25

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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.
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Velocity and Position by Integral Method01:13

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If acceleration as a function of time is known, then velocity and position functions can be derived using integral calculus. For constant acceleration, the integral equations refer to the first and second kinematic equations for velocity and position functions, respectively.
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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...
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Uniform Depth Channel Flow: Problem Solving01:18

Uniform Depth Channel Flow: Problem Solving

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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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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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Profiling Maternal Behavior Responses During Whole-Brain Imaging
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一个强大的和集成的视觉计量框架,利用光流和特征点方法.

Haiyang Qiu1, Xu Zhang2, Hui Wang1

  • 1School of Naval Architecture and Ocean Engineering, Guangzhou Maritime University, Guangzhou 510725, China.

Sensors (Basel, Switzerland)
|October 28, 2023
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种视觉测距框架,使用光流和特征点来更快,更准确地估计姿势. 它整合了两种方法,可以显著减少计算时间,同时保持稳定性.

关键词:
在ORB_SLAM3中使用.特性点方法的特征点方法.视觉流量跟踪的光学流量跟踪.视觉测距仪使用视觉测距仪.

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 计算机视觉 计算机视觉
  • 机器学习 机器学习

背景情况:

  • 视觉测距 (VO) 对于机器人导航和增强现实至关重要.
  • 现有的VO方法在实时性能和稳定性方面面临挑战,特别是在动态环境中.

研究的目的:

  • 开发一个强大的和综合的视觉测距框架.
  • 为了加快姿势估计,提高准确性和稳定性.

主要方法:

  • 使用光学流量跟踪来加快功能点匹配.
  • 将全球和本地特征点方法与过机制集成在一起.
  • 双对光流和特征点方法用于姿势估计.

主要成果:

  • 将相对姿势估计计算时间缩短到ORB_SLAM3前端测距的40%.
  • 实现与ORB_SLAM3相比的准确性和稳定性.
  • 在ORB_SLAM3框架内在EUROC数据集上验证.

结论:

  • 拟议的视觉测距框架提供了显著的速度改进.
  • 综合方法保持了高精度和稳定性.
  • 展示了对实时视觉测距应用的有希望的解决方案.