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相关概念视频

Design of Transmission Shafts01:16

Design of Transmission Shafts

286
The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by...
286

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针对小型化设计的天线的性能受约束的多目标优化.

Qi Yang1, Hongqiang Wang2, Xin Peng3

  • 1College of Electronic Science and Technology, National University of Defense Technology, Changsha, 410073, China. yangqi08@nudt.edu.cn.

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概括

对无线系统来说,天线的小型化是必不可少的. 一种新的性能受约束的多目标优化 (PCMOM) 方法有效平衡天线大小和返回损失,从而实现更好的集成.

关键词:
天线设计天线设计.微型化是微型化的.多目标优化多目标优化多端口网络建模模型

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科学领域:

  • 电气工程 电气工程
  • 电磁学 电磁学 电磁学 电磁学
  • 天线理论天线理论

背景情况:

  • 天线微型化对于推进无线通信系统至关重要.
  • 集成较小的天线可以提高设备的便携性和功能.
  • 现有的方法经常在天线尺寸和性能指标 (如回报损失) 之间的权衡方面扎.

研究的目的:

  • 为天线小型化提出一种新的性能受约束的多目标优化 (PCMOM) 方法.
  • 为了应对复杂的设计挑战,涉及天线大小和返回损失.
  • 制定策略,在满足性能标准的同时创建多样化的天线结构.

主要方法:

  • PCMOM 方法使用多端口网络模型进行天线结构优化.
  • 非主导排序基因算法II (NSGA-II) 与返回损失性能约束相集成.
  • 这种方法可以过出未能满足指定的性能要求的天线设计.

主要成果:

  • 使用PCMOM方法设计了三个像素天线.
  • 设计的两个像素天线成功制造和测试.
  • 实验验证证了PCMOM方法在管理小型化权衡方面的有效性.

结论:

  • 拟议的PCMOM方法为天线小型化挑战提供了有效的解决方案.
  • 将性能约束集成到优化算法中,对于实际的天线设计至关重要.
  • 这项研究有助于开发用于无线应用的较小,高性能天线.