| 基于HHT技术的复合材料结构损伤定位研究 |
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| 引用本文： | 常鸣,袁慎芳.基于HHT技术的复合材料结构损伤定位研究[J].宇航学报,2006,27(1):144-148,150. |
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| 作者姓名： | 常鸣 袁慎芳 |
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| 作者单位： | 南京航空航天大学智能材料与结构重点实验室,南京,210016 |
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| 基金项目： | 中国科学院资助项目;航空支撑科技基金 |
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| 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。现将此方法应用在复合材料板的一维损伤定位实验中。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——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技术可以较好的进行复合材料板上的-维损伤定位。
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| 关 键 词： | 信号处理 损伤定位 |
| 文章编号： | 1000-1328（2006）01-0144-05 |
Detecting Anomalies in Plates Based on HHT |
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| CHANG Ming,YUAN Shen-fang.Detecting Anomalies in Plates Based on HHT[J].Journal of Astronautics,2006,27(1):144-148,150. |
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| Authors: | CHANG Ming YUAN Shen-fang |
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| Institution: | The Aeronautical Key Laboralory for Smart Materials and Structures, Nanjing University of Aeronautics and Astranautics, Nanjing 210016, China |
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| Abstract: | In 1998, a new data analysis method, Hilbert Huang Transform (HHT), was developed by Norden E. Huang of NASA. This new method is proved to be ideal for non-linear and non-stationary data analysis. And it has been put into practice in several fields with good results. The method is based on two major parts: Empirical Mode Decomposition (EMD) and Hilbert Transform. This paper illustrates the feasibility of HHT as a signal processing tool for locating an anomaly in the form of a crack plate. The basis of detection hinges on simple wave propagation concepts using flight times and velocities. The result indicates that HHT is able to represent a localized event well. |
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| Keywords: | HHT |
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