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相关概念视频

Van de Graaff Generator01:15

Van de Graaff Generator

2.9K
Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...
2.9K
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

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A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
3.9K
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

8.7K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
8.7K
Plane Electromagnetic Waves II01:29

Plane Electromagnetic Waves II

3.1K
Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
3.1K
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

751
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
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相关实验视频

Updated: May 1, 2026

Early Metamorphic Insertion Technology for Insect Flight Behavior Monitoring
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Early Metamorphic Insertion Technology for Insect Flight Behavior Monitoring

Published on: July 12, 2014

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由风散播的种子所启发的三维电子微飞机

Bong Hoon Kim1,2, Kan Li3,4, Jin-Tae Kim5

  • 1Department of Organic Materials and Fiber Engineering, Soongsil University, Seoul, Republic of Korea.

Nature
|September 23, 2021
PubMed
概括

研究人员利用种子开发了新的3D飞行器, 这些生物灵感结构可用于环境监测和疾病管理的控制飞行.

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科学领域:

  • 材料科学与工程
  • 航空航天工程
  • 生物设计

背景情况:

  • 对于未来的监控系统来说, 微型无线电子设备的大量部署至关重要.
  • 现有的空中配送方法对于这些复杂的网络是不够的.
  • 生物设计为无人驾驶飞行提供了潜在的解决方案.

研究的目的:

  • 调查被动的3D结构, 控制无动力飞行.
  • 使用先进的组装技术开发微型3D飞机.
  • 探索环境监测和疾病管理中的应用.

主要方法:

  • 使用机械引导组装3D半结构.
  • 设计和制造的宏观,中等和微观飞行器.
  • 进行分析,计算和实验性空气动力学研究.
  • 开发了复杂3D结构的简化分析模型.

主要成果:

  • 展示了一系列具有主动电子和色度有效载荷的3D飞行器.
  • 建立了生物灵感飞行器的基本设计考虑因素.
  • 验证了预测飞行动态的简化模型.
  • 实现了可控的旋转动力学和低端速度.

结论:

  • 3D飞行器提供了一种可行的方法,
  • 生物启发的设计原则是有效的空中结构.
  • 这些传单在环境传感和健康监测方面具有潜在的应用.