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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

402
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...
402
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

460
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...
460
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
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

335
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...
335
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

358
A slider-crank mechanism 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. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
358
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

361
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...
361

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相关实验视频

Updated: Jul 1, 2025

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
09:32

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Published on: April 11, 2018

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动态运动转换:用于人类姿势转换的混合数据驱动和模型驱动方法.

Zhi Chai, Hong Qin

    IEEE transactions on visualization and computer graphics
    |March 1, 2024
    PubMed
    概括

    这项研究介绍了动态运动过渡 (DMT),这是一个混合方法,用于在3D动画中实现现实的人类姿势过渡. 它结合了数据驱动和模型驱动的方法,以改善运动合成和预测.

    科学领域:

    • 计算机图形和动画.
    • 人工智能的人工智能
    • 生物力学 生物力学

    背景情况:

    • 生成自然的人类姿势过渡对于3D图形和动画至关重要.
    • 现有的基于模型的方法依赖于难以获得的启发式知识.
    • 纯数据驱动的方法与未见的数据和有限的生成能力作斗争.

    研究的目的:

    • 为强大而准确的虚拟人类姿势过渡提出混合方法.
    • 解决现有的纯数据驱动和模型驱动方法的局限性.
    • 引入一种用于评估运动合成中的生成功率的新型指标.

    主要方法:

    • 开发了动态运动转换 (DMT),集成数据驱动和模型驱动的技术.
    • 采用了使用物理定律和力衍生概念的数据增强.
    • 利用条件时间变压器 (CTT) 进行微细级别的力变化学习.
    • 应用动态运动原体 (DMP) 用于粗水平的运动创建.

    主要成果:

    • 拟议的混合方法的性能优于最先进的方法.
    • 使用基于最小动作损失的新设计的指标实现了卓越的性能.
    • 在产生现实的和真实的人类运动过渡方面表现出有效性.

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    结论:

    • 动态运动转换 (DMT) 方法为虚拟人类动画提供了显著的优势.
    • 混合方法提高了发电能力,并有效地处理数据限制.
    • 这项工作有利于各种动画任务,包括运动合成,控制,跟踪和预测.