| Applications of Wigner High-order Spectra in Feature Extraction of Acoustic Emission Signals |
| |
| 作者姓名： | Xiao Siwen Liao Chuanjun Li Xuejun |
| |
| 作者单位： | Xiao Siwen,Liao Chuanjun(Key Lab of Health Maintenance for Mechanical Equipment of Human Province, Hunan Science and Technology University, Xiangtan, Hunan 411201, China);Li Xuejun(Key Lab of Health Maintenance for Mechanical Equipment of Human Province, Hunan Science and Technology University, Xiangtan, Hunan 411201, China;Department of Precision Instruments, Tsinghna University, Beijing 100084, China) |
| |
| 基金项目： | Supported by the Project of Hunan Provincial Science and Technology Research (2007FJ3025) |
| |
| 摘 要： | The characteristics of typical AE signals initiated by mechanical component damages are analyzed. Based on the extracting principle of acoustic emission（AE） signals from damaged components,the paper introduces Wigner high-order spectra to the field of feature extraction and fault diagnosis of AE signals. Some main performances of Wigner binary spectra,Wigner triple spectra and Wigner-Ville distribution （WVD） are discussed,including of time-frequency resolution,energy accumulation,reduction of crossing items and noise elimination. Wigner triple spectra is employed to the fault diagnosis of rolling bearings with AE techniques. The fault features reading from experimental data analysis are clear,accurate and intuitionistic. The validity and accuracy of Wigner high-order spectra methods proposed agree quite well with simulation results. Simulation and research results indicate that wigner high-order spectra is quite useful for condition monitoring and fault diagnosis in conjunction with AE technique,and has very important research and application values in feature extraction and faults diagnosis based on AE signals due to mechanical component damages.
|
| 关 键 词： | 声发射信号 提取原理 维格纳 高阶谱 应用 声发射（AE）信号 声发射技术 故障诊断 |
| 收稿时间： | 9/1/2008 12:00:00 AM |
Applications of Wigner high order spectra in feature extraction of acoustic emission signals |
| |
| Xiao Siwen,Liao Chuanjun,Li Xuejun.Applications of Wigner High-order Spectra in Feature Extraction of Acoustic Emission Signals[J].Engineering Sciences,2009,7(3):59-65. |
| |
| Authors: | Xiao Siwen Liao Chuanjun Li Xuejun |
| |
| Institution: | 1. Key Lab of Health Maintenance for Mechanical Equipment of Hunan Province;Hunan Science and Technology University;Xiangtan;Hunan 411201;China;2. Department of Precision Instruments;Tsinghua University;Beijing 100084;China |
| |
| Abstract: | The characteristics of typical AE signals initiated by mechanical component damages are analyzed. Based on the extracting principle of acoustic emission(AE) signals from damaged components,the paper introduces Wigner high-order spectra to the field of feature extraction and fault diagnosis of AE signals. Some main performances of Wigner binary spectra,Wigner triple spectra and Wigner-Ville distribution (WVD) are discussed,including of time-frequency resolution,energy accumulation,reduction of crossing items... |
| |
| Keywords: | acoustic emission Wigner spectra Wigner binary spectra Wigner triple spectra feature extraction rolling bearing |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《工程科学》浏览原始摘要信息 |
| 点击此处可从《工程科学》下载免费的PDF全文 |
