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相关概念视频

Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

456
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.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
456
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

219
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...
219
Kinematic Equations for Rotation01:30

Kinematic Equations for Rotation

320
In mechanics, when one observes a rigid body in rotational motion with constant angular acceleration, it is possible to establish equations for its rotational kinematics. This process resembles how linear kinematics are dealt with in simpler motion studies.
For instance, imagine a point A on a rigid body engaged in circular motion. The translational velocity of this particular point can be calculated by taking the time derivatives of the displacement equation, which essentially measures the...
320
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

395
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...
395
Azimuths and Bearings01:19

Azimuths and Bearings

116
Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...
116
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

329
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...
329

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相关实验视频

Updated: Jun 22, 2025

Evaluating Flight Performance and Eye Movement Patterns Using Virtual Reality Flight Simulator
03:49

Evaluating Flight Performance and Eye Movement Patterns Using Virtual Reality Flight Simulator

Published on: May 19, 2023

926

使用计算机视觉对飞机模型的基于四子的态度估计.

Pavithra Kasula1, James F Whidborne1, Zeeshan A Rana1

  • 1Centre for Aeronautics, Cranfield University, Cranfield MK43 0AL, UK.

Sensors (Basel, Switzerland)
|June 27, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种基于非接触视觉的方法,用于在风洞中测试飞机飞行动力学. 与旧方法相比,基于四次数的方法显著提高了态度估计的准确性.

关键词:
欧勒角是指欧勒角的角度.计算机视觉 计算机视觉计算机辅助设计是计算机辅助设计.动态风洞测试 动态风洞测试扩展的卡尔曼过器飞行动态 飞行动态惯性测量单位是一种惯性测量单位.四季节的四季节是四季节.

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Last Updated: Jun 22, 2025

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科学领域:

  • 航空航天工程 航空航天工程
  • 机器人和控制系统 机器人和控制系统
  • 计算机视觉 计算机视觉

背景情况:

  • 动态风洞测试对于飞机飞行动力学研究至关重要.
  • 传统方法可能缺乏精度或需要侵入性仪器仪表.
  • 准确的态度估计对于了解飞机行为至关重要.

研究的目的:

  • 为动态风洞测试提出和验证一种非接触式,基于机外视觉的仪器仪表方法.
  • 为了提高欧勒角度识别的准确性,使用四次数.
  • 使用扩展卡尔曼波器将基于视觉的数据与车载传感器集成.

主要方法:

  • 利用哈里斯角探测和Kanade-Lucas-Tomasi跟踪进行特征识别.
  • 采用立体相机设置 (侧面和顶部视图) 进行3D动作捕捉.
  • 应用四子表示用于态度估计和扩展卡尔曼波器用于传感器融合.

主要成果:

  • 基于四次数的视觉方法实现了比方向共弦矩阵方法提高45.41%的精度.
  • 滚动,斜率和斜率的根平均平方误差分别为0.0101,0.0361和0.0036 rad/s.
  • 与扩展卡尔曼波器的集成进一步提高了准确性,达到98.61%的率估计.

结论:

  • 基于四的态度估计为动态风洞测试提供了更高的准确性.
  • 提出的基于视觉的方法为飞机动力学分析提供了强大的非接触式解决方案.
  • 传感器与扩展卡尔曼波器的融合提高了系统的整体性能和可靠性.