基于改进HHT的水中爆炸冲击波信号时频特性分析方法OA北大核心CSCDCSTPCD
Time-frequency representation analysis in underwater explosive shock wave signals based on an improved HHT method
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进行分析.
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 fi…查看全部>>
程擂;韩焱;王鉴;杜娟
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
数理科学
爆炸力学改进HHTHHT能量分布时频图爆炸冲击波信号
mechanics of explosion improved HHT time-frequency representation explosive shock wave signal
《爆炸与冲击》 2011 (3)
326-331,6
基于不规则冲击波重建技术国防重点实验室基金项目(9140c1204040908)
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