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Wind Turbine Machine Models01:24

Wind Turbine Machine Models

562
In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
562
Design Example: Calculating Safe Diameter for Wind-Exposed Disc01:17

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

355
Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
355
Fatigue01:21

Fatigue

801
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
801
Radial System Protection01:23

Radial System Protection

420
Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
420
Node Analysis for AC Circuits01:14

Node Analysis for AC Circuits

642
Consider an angioplasty system featuring a catheter equipped with a turbine, a critical tool for removing plaque deposits from coronary arteries. This intricate medical device operates using a circuit model reminiscent of a dual-node RLC circuit powered by a current-controlled voltage source.
To unravel the complexities of this system, nodal analysis is employed, a powerful technique founded on Kirchhoff's current law (KCL), which remains valid for phasors. AC circuits can effectively be...
642

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相关实验视频

Updated: Jan 17, 2026

Data Acquisition Protocol for Determining Embedded Sensitivity Functions
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使用卷积神经网络探测风力轮机叶片的基于雷达的损坏检测:在疲劳负荷下的概念验证.

Erik Streser1, Sercan Alipek2, Manuel Rao2

  • 1Department of Physics, Goethe-University Frankfurt, Max-von-Laue Str. 1, 60438 Frankfurt am Main, Germany.

Sensors (Basel, Switzerland)
|September 19, 2025
PubMed
概括

这项研究引入了一种新的卷积神经网络 (CNN) 方法,用于使用雷达数据检测风力轮机叶片的损伤. 该方法准确地分类完整与受损的条件,即使在不同的负载下也能获得高的F1分数.

关键词:
在FMCW雷达.卷积神经网络是一种卷积神经网络.检测损坏检测损坏的检测.毫米波是一种毫米波.结构健康监测 结构健康监测风力轮机的叶片可以

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科学领域:

  • 工程 工程师 工程师 工程师
  • 材料科学 材料科学 材料科学
  • 人工智能的人工智能

背景情况:

  • 结构健康监测 (SHM) 对风力轮机叶片的完整性至关重要.
  • 传统的SHM方法通常需要对环境和运营因素进行复杂的补偿.
  • 基于雷达的SHM提供了一个非破坏性的,可能更强大的替代方案.

研究的目的:

  • 开发和验证基于卷积神经网络 (CNN) 的风力轮机叶片损坏检测框架,使用雷达测量.
  • 评估拟议的CNN方法在区分完整和损坏的刀片条件的性能.
  • 证明框架能够在没有对温度和负载效应的明确补偿的情况下内在学习必要信息的能力.

主要方法:

  • 在疲劳测试期间,收集了31米风力轮机叶片上嵌入式传感器的雷达测量结果.
  • 雷达数据被转化为适合CNN输入的图像类型表示.
  • 一个CNN模型被训练来分类风力轮机叶片的状况 (完好或损坏).

主要成果:

  • 基于CNN的方法在损坏检测方面表现出了很高的准确性.
  • 获得的F1伤害分类分数在91%至100%之间.
  • 该框架成功地将叶片的条件分类为装载和卸载状态,表明了强度.

结论:

  • 拟议的基于CNN的雷达SHM方法对风力轮机叶片损坏检测有效.
  • 该框架能够直接从雷达图像中学习损坏指标,这简化了SHM过程.
  • 这种方法显示出可靠和自动化的风力轮机叶片结构健康监测的重大前景.