模式自适应小波构造与添加及其在爆破振动信号分析中的应用

PDF(1846 KB)

振动与冲击 ›› 2014, Vol. 33 ›› Issue (12) : 53-57.

论文

模式自适应小波构造与添加及其在爆破振动信号分析中的应用

凌同华1，张胜1，2，陈倩倩1，刘家澍1

作者信息 +

Pattern adapted wavelet construction and addition and its application to blast vibration signal analysis

LING Tong-hua1，ZHANG Sheng1,2，CHEN Qian-qian1，LIU Jia-shu1

Author information +

文章历史 +

摘要

小波分析中所用到的小波基既不是任意的也不是唯一的，同一信号使用不同的小波基进行分析时会产生不同的结果，如何解决适合爆破振动信号特征的小波基构造、添加及其实现等问题，始终是困扰广大研究者的难题。针对爆破振动信号具有持时短、突变快等特点，通过对从实测微差爆破振动信号中分离出的子信号进行模式自适应匹配，构造与实测爆破振动信号波形相似度高的小波基函数，然后将该爆破振动信号小波基添加到MATLAB小波分析工具箱中，并用于对微差起爆延时间隔的精确定位，结果表明所构造的模式自适应连续小波具有良好的应用效果，从而为爆破振动信号分析在实际工程中的应用提供了参考。

Abstract

In wavelet analysis, wavelet basis being used is neither arbitrary nor unique. Even for the same signal, using different wavelet function may cause different results. How to solve the problem of wavelet basis construction, addition and its application for blast vibration signal is always a problem puzzling the researchers. Based on the characteristics of short-duration and abrupt for blast vibration signal, through matching the pattern adapted from sub-signal based on separation from measured millisecond blast vibration signal, the wavelet basis with a high similarity of measured blast vibration signal can be constructed. Then blast vibration signal wavelet basis was added to the wavelet toolbox in MATLAB and used to identify the accurate positioning of the millisecond delay interval. The results showed that the pattern adapted continuous wavelet basis of blast vibration signal has useful application effect, and also provides important reference for blast vibration signal analysis being applied to practical use in engineering.

导出引用

凌同华;张胜;陈倩倩;刘家澍. 模式自适应小波构造与添加及其在爆破振动信号分析中的应用[J]. 振动与冲击, 2014, 33(12): 53-57

LING Tong-hua;ZHANG Sheng;CHEN Qian-qian;LIU Jia-shu. Pattern adapted wavelet construction and addition and its application to blast vibration signal analysis[J]. Journal of Vibration and Shock, 2014, 33(12): 53-57