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関連する概念動画

Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

271
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...
271
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

530
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...
530
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

393
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...
393
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

422
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...
422
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

429
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...
429
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

448
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...
448

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関連する実験動画

Updated: Sep 9, 2025

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
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主要成分分析を用いて,槍投げにおける影響的な運動パターンを特定する

Kenta Nishiyama

    Journal of sports sciences
    |September 2, 2025
    PubMed
    まとめ
    この要約は機械生成です。

    槍の投げる性能は,ランアップ速度に関連した単一のキーモーションパターン (PC1) によって大きく影響されます. これらの槍の投げるメカニズムを分析することで 熟練した選手と初心者を区別できます

    キーワード:
    槍の投げる運動パターン主要成分分析投げる動き投げるテクニック

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    関連する実験動画

    Last Updated: Sep 9, 2025

    Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
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    科学分野:

    • バイオメカニクス
    • スポーツ科学
    • 運動科学

    背景:

    • 槍の投げる術を最適化するには 身体の部位の調整を 理解する必要があります
    • 波形の再構築は 複雑な運動パターンを分析するのに重要です

    研究 の 目的:

    • 槍の投げる距離に影響を与える特定の運動パターンを特定し,記述する.
    • ボディセグメントの動きと投げるパフォーマンスの関係を分析する.

    主な方法:

    • 3Dモーションデータに関する主要なコンポーネント分析 (PCA) と波形分析を使用した.
    • 32人の大学生の最優秀な槍投げの 運動変数を分析した
    • 運動の偏差の82.19%を説明する13の主要な構成要素 (PC) を抽出しました.

    主要な成果:

    • 1つの主要な構成要素 (PC1) は,投げ距離に影響を与える主要な運動パターンとして特定されました.
    • PC1は,放出点での上昇速度と相関しています.
    • 熟練した投手と熟練していない投手の間では,PC1の異なる波形パターンが観察されました.

    結論:

    • PC1によって捕捉されたランアップ速度は,槍の投げ距離の重要な要因です.
    • PCAによって特定された特定の運動パターンは,投げ手のスキルを区別することができます.
    • この分析は,ジャベリン選手のテクニックの改善のための洞察を提供します.