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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

404
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...
404
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

461
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...
461
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

362
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...
362
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

359
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...
359
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

337
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...
337
Gyroscope: Precession01:24

Gyroscope: Precession

4.1K
Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
4.1K

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相关实验视频

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Bringing the Visible Universe into Focus with Robo-AO
10:35

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太空机器人传感器噪声改进使用轨道成形.

Emily Kuck1, Timothy Sands2

  • 1Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA.

Sensors (Basel, Switzerland)
|January 26, 2024
PubMed
概括

由于低频振动,太空机器人面临控制挑战. 在理想的条件下,正弦轨迹提高了97.39%的控制精度,优于灵活机器人的传统步进输入.

科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 控制系统工程 控制系统工程
  • 航空航天工程 航空航天工程

背景情况:

  • 太空机器人需要轻量化设计,导致低自然频率干扰态度控制.
  • 控制结构互动是一个重大挑战,低质量,噪音大的传感器加剧了这一问题.
  • 传统的步骤函数轨迹是不连续的,对于这些系统来说并不总是最佳的.

研究的目的:

  • 探索用于控制灵活空间机器人的替代输入轨迹.
  • 调查侧面轨迹在缓解控制结构相互作用方面的有效性.
  • 为了比较不同轨迹在不同噪声条件下的性能.

主要方法:

  • 导出灵活的附属物,刚性体和反应轮系统的运动方程.
  • 开发一个基准反控制器,用于刚性车身模式和额外的波器,用于灵活模式.
  • 自主生成侧面轨迹和实施前鞭伤补偿进行比较.

主要成果:

  • 形轨迹方法在没有随机错误的情况下显示出比基线阶段轨迹有97.39%的改善.
  • 在理想条件下,形轨迹在最小化控制误差方面被发现是优越的.
  • 然而,当传感器噪音和随机错误存在时,传统的步骤轨迹表现更好,而不是形轨迹.
关键词:
带通过波器的波器.灵活的机器人 灵活的机器人片过器的隙过器是什么意思结构动力学 结构动力学结构过的结构过.运行轨迹的生成过程鞭毛损伤补偿金 鞭毛损伤补偿金 鞭毛损伤补偿金

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结论:

  • 形轨迹为在无噪声环境中控制灵活的太空机器人提供了显著的改进.
  • 输入轨迹的选择至关重要,取决于传感器噪声和外部干扰的存在.
  • 进一步的研究可能会探索适应性或强大的轨迹生成方法来处理现实世界的空间条件.