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相关概念视频

Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

159
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
159
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

76
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: Jun 7, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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反向设计的超紧的被动相变器用于高性能梁方向.

Tianyang Fu1,2, Mengfan Chu1, Ke Jin1

  • 1State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.

Sensors (Basel, Switzerland)
|November 9, 2024
PubMed
概括

研究人员使用多目标粒子群优化开发了超紧的被动相移器. 这些设备使高性能光学相位阵列激光雷达具有很大的光束转向范围.

关键词:
灯束转向的方向盘.反向设计的设计.阶段变速器 阶段变速器

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相关实验视频

Last Updated: Jun 7, 2025

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科学领域:

  • 光子学和光学工程的工程.
  • 纳米技术纳米技术
  • 计算电磁学 计算机电磁学

背景情况:

  • 传统的光学相位阵列通常需要复杂的制造和大尺寸的足迹.
  • 在光学系统中,使用紧型设备实现广角光束转向仍然是一个重大挑战.
  • 被动相位变换器是控制光学相位阵列中的光方向的关键组件.

研究的目的:

  • 为光学相位阵列应用设计和演示超紧的被动相位变换器.
  • 研究工程波导的波长依赖的相位转移特征.
  • 将这些相变器与格子发射器集成为光束方向功能.

主要方法:

  • 利用多目标粒子群集优化用于相变器的反向设计.
  • 采用带有随机空气孔阵列的矩形波导,以诱导波长依赖的相差.
  • 制造和特征集成梁转向结构的性能.

主要成果:

  • 在30纳米带宽 (1535-1565纳米) 上实现了6.26rad (TE) 和6.95rad (TM) 的显著相调范围.
  • 与阵列波导网格相比,展示了具有更高传输和更小足迹的相变器.
  • 集成结构的横向扫描范围很大,为±25.47° (TE) 和±27.85° (TM).

结论:

  • 开发的反向设计的被动相变器为超紧的光学系统提供了一个有前途的解决方案.
  • 这项技术有助于开发具有广泛扫描能力的高性能光学相位阵列激光雷达.
  • 该方法为各种光子应用提供了小型化和高效的光束方向装置的途径.