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相关概念视频

Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

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When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
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Distance Corrections01:15

Distance Corrections

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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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Curvilinear Motion: Rectangular Components01:23

Curvilinear Motion: Rectangular Components

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Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the...
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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

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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.
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Propagation of Uncertainty from Systematic Error

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The atomic mass of an element varies due to the relative ratio of its isotopes. A sample's relative proportion of oxygen isotopes influences its average atomic mass. For instance, if we were to measure the atomic mass of oxygen from a sample, the mass would be a weighted average of the isotopic masses of oxygen in that sample. Since a single sample is not likely to perfectly reflect the true atomic mass of oxygen for all the molecules of oxygen on Earth, the mass we obtain from this...
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Operation of the Collaborative Composite Manufacturing CCM System
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一种新的方法,通过补偿路径错误来提高机器人平滑系统中的光学元件平滑质量.

Yonghong Deng, Xi Hou, Bincheng Li

    Optics express
    |September 15, 2023
    PubMed
    概括

    这项研究介绍了一种切比舍夫插入的莱文伯格-马奎特算法 (CILM),用于改进光学元件的机器人光滑. CILM有效地弥补了路径偏差,提高了加工质量和精度.

    科学领域:

    • 光学工程的光学工程.
    • 机器人技术 机器人技术 机器人技术
    • 精密制造 精密制造 精密制造 精密制造

    背景情况:

    • 机械加工设备中的几何错误会导致路径偏差,降低光学元件的质量.
    • 机器人光滑系统对于光学元件处理至关重要,但容易发生这些错误.

    研究的目的:

    • 介绍一个切比舍夫插入的莱文伯格-马奎特算法 (CILM) 用于在机器人平滑系统中补偿路径偏差.
    • 提高光学元件加工的加工质量和效率.

    主要方法:

    • 激光追踪器测量以评估机器人光滑系统的定位精度.
    • 使用机器人动力学和错误模型来优化几何错误的目标函数构造.
    • 应用CILM来识别几何参数并补偿路径偏差.

    主要成果:

    • CILM显著提高了机器人光滑系统的绝对定位精度.
    • 实验结果显示,峰值到谷值 (15.70%,28.7%,4.01%) 和平方根平均值 (33.67%,21.57%,10.23%) 的降低.
    • 功率光谱密度曲线在CILM补偿后表现出更光滑的表面特征.

    结论:

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  • 在光学元件的机器人光滑系统中,CILM有效地弥补了路径偏差.
  • 拟议的方法提高了加工光学元件的定位精度和表面质量.