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相关概念视频

Eccentric Loading01:16

Eccentric Loading

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Eccentric loading is a crucial concept in the study of structural engineering and mechanics, particularly when analyzing the stability and stress distribution in columns. Unlike centric loading, where the force is applied along the centroidal axis, causing uniform compression, eccentric loading occurs when a force is applied off-center. This off-center application introduces not only direct compressive stress but also bending stress, significantly influencing the column's behavior under...
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Control Systems01:10

Control Systems

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Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
At the heart...
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Gyroscope: Precession01:24

Gyroscope: Precession

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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...
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One-Degree-of-Freedom System01:24

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In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
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Adjusting a Traverse01:12

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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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Rotation with Constant Angular Acceleration - I01:37

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If angular acceleration is constant, then we can simplify equations of rotational kinematics, similar to the equations of linear kinematics. This simplified set of equations can be used to describe many applications in physics and engineering where the angular acceleration of a system is constant.
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相关实验视频

Updated: Jun 19, 2025

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
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对于绝对光学编码器的离心率误差的自动补偿系统.

Changhai Zhao1, Qiuhua Wan1, Lihui Liang1

  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China.

The Review of scientific instruments
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概括
此摘要是机器生成的。

异常误差显著影响光学编码器的精度. 这项研究引入了使用辐射代码路径的自动补偿系统,将平均平方误差从21.25降至3.66弧秒.

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科学领域:

  • 光电学是指光电子产品.
  • 精密工程 精密工程是指精密的工程.
  • 计量学 计量学 计量学

背景情况:

  • 偏心误差是高精度光学编码器中不准确的主要来源.
  • 传统的编码器设计往往难以减轻这种固有的错误.
  • 精确的测量和补偿对于高级应用至关重要.

研究的目的:

  • 开发和验证光学编码器的自动错误补偿系统.
  • 为了减少异常误差对编码器精度的影响.
  • 为了提高高精度光学编码器的整体性能.

主要方法:

  • 在编码器磁盘上集成一个新的辐射代码路径,垂直于细代码路径.
  • 使用来自光线代码通道的moiré边缘信号来实时测量编码器磁盘异心率.
  • 基于测量异心率的异心率错误补偿算法的实施.

主要成果:

  • 开发的系统成功地测量了编码器磁盘的偏心.
  • 实时补偿显著降低了编码器的平均平方误差.
  • 平均平方误差从补偿前的21.25弧秒下降到补偿后的3.66弧秒.

结论:

  • 提出的自动错误补偿系统有效地减轻了光学编码器中的偏心误差.
  • 这种方法在编码器准确度上有了显著的改进.
  • 该系统显示了提高光学测量器件精度的巨大潜力.