Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

85
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
85
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

80
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...
80
Discrete Fourier Transform01:15

Discrete Fourier Transform

229
The Discrete Fourier Transform (DFT) is a fundamental tool in signal processing, extending the discrete-time Fourier transform by evaluating discrete signals at uniformly spaced frequency intervals. This transformation converts a finite sequence of time-domain samples into frequency components, each representing complex sinusoids ordered by frequency. The DFT translates these sequences into the frequency domain, effectively indicating the magnitude and phase of each frequency component present...
229
Fast Fourier Transform01:10

Fast Fourier Transform

287
The Fast Fourier Transform (FFT) is a computational algorithm designed to compute the Discrete Fourier Transform (DFT) efficiently. By breaking down the calculations into smaller, manageable sections, the FFT significantly reduces the computational complexity involved. Direct computation of an N-point DFT requires N2 complex multiplications, whereas the FFT algorithm needs only (N/2)log⁡2N multiplications, offering a much faster performance.
The computational efficiency of the FFT becomes...
287
Aliasing01:18

Aliasing

124
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
124
Time and frequency -Domain Interpretation of PI Control01:27

Time and frequency -Domain Interpretation of PI Control

113
Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
113

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Robust Fractional Low Order Adaptive Linear Chirplet Transform and Its Application to Fault Analysis.

Entropy (Basel, Switzerland)·2025
Same author

Adgrg1 is a new transcriptional target of Hand1 during trophoblast giant cell differentiation.

Journal of reproductive immunology·2022
Same author

Biogeographic and metabolic studies support a glacial radiation hypothesis during <i>Chrysanthemum</i> evolution.

Horticulture research·2022
Same author

One-Stage Anterior Retropharyngeal Release Followed by Posterior Open Reduction and Intra-Articular Cage Fusion for Treating Chronic Fixed Type III Atlantoaxial Rotatory Fixation.

World neurosurgery·2022
Same author

Transcriptome sequencing and gas chromatography-mass spectrometry analyses provide insights into β-caryophyllene biosynthesis in <i>Brassica campestris</i>.

Food chemistry. Molecular sciences·2022
Same author

CDC42 governs normal oviduct multiciliogenesis through activating AKT to ensure timely embryo transport.

Cell death & disease·2022

相关实验视频

Updated: Jun 14, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.6K

强大的后处理时间频率技术及其在机械故障诊断中的应用.

Junbo Long1, Changshou Deng2, Haibin Wang3

  • 1College of Electronic Information Engineering, Jiujiang University, Jiujiang, China.

Scientific reports
|September 3, 2024
PubMed
概括

新的故障诊断方法改善了无限方差过程的信号的时间频率分辨率. 这些强大的技术在复杂的噪音环境中优于传统方法,提高了轴承等机械设备的诊断准确度.

关键词:
功能提取 功能提取模糊能量是一种模糊的能量.无限变量过程的无限变量过程多同步挤压多同步挤压同步挤压提取 提取

更多相关视频

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
00:05

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation

Published on: September 29, 2019

8.2K
Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
11:34

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

11.1K

相关实验视频

Last Updated: Jun 14, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

1.6K
Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
00:05

Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation

Published on: September 29, 2019

8.2K
Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
11:34

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

11.1K

科学领域:

  • 信号处理 信号处理
  • 机械工程 机械工程
  • 错误诊断 错误诊断 在

背景情况:

  • 传统的同步挤压转换 (SST) 和同步提取转换 (SET) 方法提高了故障诊断的时间频率分辨率 (TFR).
  • 正常和故障信号,包括背景噪声,可以作为无限方差过程 (1 < α ≤ 2) 建模,挑战传统的TFR方法.
  • 在无限差异的工艺环境中,标准SST和SET的有效性显著下降.

研究的目的:

  • 开发强大的后处理方法,以改善在无限差异过程条件下的故障诊断中的TFR分辨率.
  • 在复杂的信号环境中数学推导和验证旨在克服传统方法在复杂信号环境中的局限性的新算法.

主要方法:

  • 建议的强大的后处理技术:FSET,FSSET,FSOSET和FMSST.
  • 利用无限方差过程统计模型和FLOS技术进行算法开发.
  • 完成了拟议方法的数学导数.

主要成果:

  • 与传统的SST和SET技术相比,提出的方法显示出更高的性能.
  • 应用于诊断由无限方差过程损坏的轴承外围赛道信号,新方法显示出显著的性能优势.
  • 对比分析证实了新型算法的增强的TFR分辨率和诊断精度.

结论:

  • 开发的FSET,FSSET,FSOSET和FMSST方法提供了可靠的解决方案,用于在信号中进行故障诊断,其特点是无限差异过程.
  • 这些先进的算法提供了改进的TFR分辨率和诊断性能,特别是在杂和复杂的信号条件下.
  • 该研究总结了改进算法的特性,局限性和应用场景,用于未来的研究和工业实施.