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相关概念视频

Superposition Theorem for AC Circuits01:13

Superposition Theorem for AC Circuits

575
Consider encountering a circuit in a steady state where all its inputs are sinusoidal, yet they do not all possess the same frequency. Such a circuit is not classified as an alternating current (AC) circuit, and consequently, its currents and voltages will not exhibit sinusoidal behavior. However, this circuit can be analyzed using the principle of superposition.
The principle of superposition stipulates that the output of a linear circuit with several concurrent inputs is equivalent to the...
575
The Power Superposition Principle01:19

The Power Superposition Principle

141
Consider a circuit with two sinusoidal voltage sources. Each one influences the circuit independently, and the superposition principle helps us understand the combined effect by adding up the responses from each source.
141
Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

143
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
143
The Power Flow Problem and Solution01:26

The Power Flow Problem and Solution

146
Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk​, phase angle δk​, real power Pk​, and reactive power Qk​. Two of these four variables are inputs, while the...
146
Active Filters01:25

Active Filters

704
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
704
Power in a Three-Phase Circuit01:15

Power in a Three-Phase Circuit

275
Three-phase systems have two configurations: the wye and delta. A star configuration can be three or four wires; in a delta configuration, the components are connected in a closed loop. Instantaneous power refers to the power value at a precise moment, and in a balanced three-phase system, it is constant. This is because the sum of the instantaneous powers in the three phases remains steady over time, despite individual fluctuations, due to the symmetry and phase relationship. The total...
275

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Updated: May 20, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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航空活性功率过器的波电流检测算法,基于通用的延迟信号叠加.

Yong Lu1, Bohan Li2, Guofei Teng3

  • 1School of Energy and Electrical Engineering, Chang'an University, Xi'an, 710064, China. luyong@chd.edu.cn.

Scientific reports
|March 27, 2025
PubMed
概括
此摘要是机器生成的。

本研究引入了用于变频飞机动力系统中主动功率过器的新波检测算法. 拟议的方法为更多电气飞机 (MEA) 应用提供了更好的准确性和适应性.

关键词:
活跃功率过器是一个活跃功率过器.一般延迟信号的叠加.波检测方法 波检测方法更多的电动飞机变频电网是一个变频电网.

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科学领域:

  • 电气工程 电气工程
  • 航空航天工程 航空航天工程

背景情况:

  • 传统的波检测方法在更多电气飞机 (MEA) 中与变频网格作斗争.
  • 现有的技术显示过性能不足,适应频率波动的适应性不佳.

研究的目的:

  • 为MEA变频电网中的活性功率过器提出一种新的波检测算法.
  • 为了提高过性能和适应频率变化的适应性.

主要方法:

  • 导出和分析一个新的过操作员的原理,特性和频率适应性.
  • 基于拟议的操作员设计一个全面的波电流检测算法.
  • 对操作人员复杂性和对称系数进行分析,以缩短操作时间.

主要成果:

  • 拟议的算法有效地检测复杂的航空航天动力系统电流信号中的波.
  • 实验验证证证实与传统方法相比,性能,准确性和稳定性都优越.
  • 在变频电网环境中证明了实际适用性.

结论:

  • 开发的波检测算法解决了MEA传统方法的局限性.
  • 该算法表现出卓越的准确性,性能,稳定性和适应性,适用于航空航天动力系统.