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相关概念视频

Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

86
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
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相关实验视频

Updated: Jul 9, 2025

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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精确的相位测量边缘反射技术通过优化摄像头响应测量.

Fendan Hu1, Wenqi Zhu1, Wei Huang1

  • 1College of Computer Science & Technology, Zhejiang University of Technology, Hangzhou 310023, China.

Sensors (Basel, Switzerland)
|December 9, 2023
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的方法,用于改进使用边缘反射的非接触光学测量. 通过开发一个缩放的能量量,研究人员减少了非线性误差,提高了测量精度.

关键词:
摄像头的响应功能是相机的响应功能.边缘反射技术的技术精确度的提高提高了精确度.

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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

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相关实验视频

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科学领域:

  • 光学测量 测量 光学测量
  • 表面的表征表征 表面的表征
  • 计量学 计量学 计量学

背景情况:

  • 边缘反射是一种非接触式光学技术,用于精确的空间测量.
  • 边缘图案生成和捕获中的非线性会在相提取中引入错误.
  • 系统精度受到这些不可避免的相位测量误差的限制.

研究的目的:

  • 为了减少边缘反射测量的非线性误差.
  • 从像素值构建一个新的数量,该数量线性地响应边缘图案.
  • 为了提高光学测量系统的精度.

主要方法:

  • 假设边缘图案显示和相机捕捉过程之间的相似性.
  • 开发了一个基于相机响应函数的缩放能量量.
  • 优化了提取的摄像头响应功能,以尽量减少错误.

主要成果:

  • 拟议的缩放能量量表明对理想的边缘图案的反应更为线性.
  • 优化摄像头响应功能显著减少了测量误差.
  • 实验验证证了在确定点位置时的提高精度.

结论:

  • 这种新方法有效地减轻了边缘反射中的非线性错误.
  • 该技术为镜面表面的表征提供了更高的精度.
  • 这种方法提升了非接触式光学测量能力.