摘要
Hilbert Huang Transform(HHT)是一种新型的信号处理方法,主要适用于非线性、非平稳信号的分析,其应用已经越来越广泛。本文将此方法应用在复合材料板的二维损伤定位实验中。在复合材料板损伤前和损伤后各采集一组信号,对其进行HHT分析。对比分析结果一二者的时间-振幅与时间-频率分布,在图中读出差异,从而定位出损伤的位置。实验结果显示,应用HHT技术可以进行复合材料板上的二维损伤定位,且精度较高。
A new data analysis method, Hilbert Huang Transform （HHT）, was developed by Norden E. Huang of NASA. This new method has been put into practice in several fields with good results. This paper illustrates the feasibility of HHT as a signal processing tool for locating an anomaly in a damaged glassfiber composite. First, acquire two types of signals which were transmitted through the plate under the circumstances of health one and damage one;then process the data by HHT. Comparing the Hilbert spectrums the damage can be localized well.
出处
《国外电子测量技术》
2008年第12期26-29,共4页
Foreign Electronic Measurement Technology
关键词
HHT
信号处理
损伤定位
HHT
data analysis
locating an anomaly
