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関連する概念動画

Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

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

Relative Motion Analysis using Rotating Axes

858
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...
858
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

780
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...
780
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

677
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...
677
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

670
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...
670
Rotation with Constant Angular Acceleration - II01:16

Rotation with Constant Angular Acceleration - II

7.0K
Kinematics is the description of motion. The kinematics of rotational motion discusses the relationships between rotation angle, angular velocity, angular acceleration, and time. One can describe many things with great precision using kinematics, but kinematics does not consider causes. For example, a large angular acceleration describes a very rapid change in angular velocity without any consideration of its cause. Thus, rotational kinematics does not represent the laws of nature.
The first...
7.0K

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関連する実験動画

Updated: Jan 8, 2026

Three-dimensional Super Resolution Microscopy of F-actin Filaments by Interferometric PhotoActivated Localization Microscopy iPALM
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高ダイナミック条件下におけるスター・トラッカー用加速運動星点中心位置特定法

Sida Mu, Lingyun Wang, Chun Wang

    Optics express
    |December 19, 2025
    PubMed
    まとめ

    本研究では、高加速度マヌーバ中の衛星姿勢制御精度を向上させるための新しい星点位置特定法を紹介します。この技術は、中心位置特定精度を維持しながら、許容角加速度範囲を400%以上向上させます。

    科学分野:

    • 航空宇宙工学
    • 宇宙力学
    • 制御システム

    背景:

    • スター・トラッカーの中心位置特定精度は、衛星の姿勢制御にとって重要です。
    • 高加速度マヌーバは、姿勢決定精度を低下させます。

    研究 の 目的:

    • 高加速度条件のための星点中心位置特定法を開発すること。
    • ダイナミックマヌーバ中の衛星姿勢決定精度を向上させること。

    主な方法:

    • センサー座標系における星点の加速度運動モデルを確立しました。
    • 初期軌道パラメータ推定を用いた中心位置特定法を提案しました。
    • 速度依存性フィットネス関数を備えた粒子群最適化アルゴリズムでパラメータを洗練させました。

    主要な成果:

    • 提案手法は、高加速度下での中心位置特定精度を大幅に向上させます。
    • 従来の.,手法と比較して、許容角加速度範囲を少なくとも400%拡大しました。
    • 激しいマヌーバ中でも、高い中心位置特定精度を維持しました。

    結論:

    • 新しい手法は、高加速度マヌーバ中の姿勢決定精度の低下に効果的に対処します。
    キーワード:
    スター・トラッカー姿勢決定高加速度星点中心位置特定宇宙工学

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  • このアプローチは、ダイナミックな宇宙環境におけるスター・トラッカーの堅牢性と性能を向上させます。
  • この技術は、高い角加速度に直面する衛星姿勢制御システムに大幅な改善を提供します。