| 基于改进HHT的水中爆炸冲击波信号时频特性分析方法 |
| |
| 引用本文： | 程擂,韩焱,王鉴,杜娟.基于改进HHT的水中爆炸冲击波信号时频特性分析方法[J].爆炸与冲击,2011,31(3):326-331. |
| |
| 作者姓名： | 程擂 韩焱 王鉴 杜娟 |
| |
| 作者单位： | 中北大学电子测试技术国家重点实验室,山西太原,030051;中北大学电子测试技术国家重点实验室,山西太原,030051;中北大学电子测试技术国家重点实验室,山西太原,030051;中北大学电子测试技术国家重点实验室,山西太原,030051 |
| |
| 基金项目： | 基于不规则冲击波重建技术国防重点实验室基金项目(9140c1204040908) |
| |
| 摘 要： | 根据水中爆炸冲击波信号的特征,利用希尔伯特-黄变换(HHT)处理非平稳信号的优势,提出了一种结合小波分解及相关系数筛选的改进HHT方法.该方法首先通过小波分解将信号分为高频部分和低频部分,然后利用相关系数对固有模态函数(IMF)分量进行筛选.理论与实践表明,改进的HHT方法能够有效、准确地对水中爆炸冲击波信号的时频信息...
|
| 关 键 词： | 爆炸力学 改进HHT HHT能量分布时频图 爆炸冲击波信号 |
Time-frequency representation analysis in underwater explosive shock wave signals based on an improved HHT method |
| |
| CHENG Lei,HAN Yan,WANG Jian,DU Juan.Time-frequency representation analysis in underwater explosive shock wave signals based on an improved HHT method[J].Explosion and Shock Waves,2011,31(3):326-331. |
| |
| Authors: | CHENG Lei HAN Yan WANG Jian DU Juan |
| |
| Institution: | 1.NationalKeylaboratoryofElectronicTesting,NorthUniversityofChina, |
| |
| Abstract: | Based on the characters of underwater explosion shock waves,an improved Hilbert-Huang transform(HHT) method was proposed by taking the advantage of HHT in processing non-stationary signals and combining wavelet decomposition and correlation coefficient filtering.In the improved HHT method,first signals are divided into high-frequency signals and low-frequency signals by wavelet decomposition,and then intrinsic mode function(IMF) components are filtered by correlation coefficients.Results show that the impro... |
| |
| Keywords: | mechanics of explosion improved HHT time-frequency representation explosive shock wave signal |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《爆炸与冲击》浏览原始摘要信息 |
| 点击此处可从《爆炸与冲击》下载免费的PDF全文 |
|
