| 采样频率对局域波分解的影响 |
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| 引用本文： | 张志新,马孝江,苗刚.采样频率对局域波分解的影响[J].上海交通大学学报,2006,40(11):1976-1978,1982. |
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| 作者姓名： | 张志新 马孝江 苗刚 |
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| 作者单位： | 大连理工大学,精密与特种加工教育部重点实验室,大连,116024 |
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| 摘 要： | 在分析了局域波方法特征的基础上,深入探讨了采样频率对局域波分解的影响.对单频正弦信号的分析结果表明,应用局域波分解对信号进行分析时,要对信号进行过采样.研究结果揭示了分解误差和采样频率的关系,验证了提高采样频率可以有效地降低分解误差.
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| 关 键 词： | 局域波法 Hilbert谱 时频分析 |
| 文章编号： | 1006-2467（2006）11-1976-03 |
| 收稿时间： | 2006-03-08 |
| 修稿时间： | 2006-03-08 |
The Effect of Sample Frequency on the Decomposition of Local Wave Method |
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| ZHANG Zhi-xin,MA Xiao-jiang,MIAO Gang.The Effect of Sample Frequency on the Decomposition of Local Wave Method[J].Journal of Shanghai Jiaotong University,2006,40(11):1976-1978,1982. |
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| Authors: | ZHANG Zhi-xin MA Xiao-jiang MIAO Gang |
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| Institution: | Key Lab. for Precision and Non-traditional Machining Technology of the Ministry of Education, Dalian Univ. of Technology, Dalian 116024, China |
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| Abstract: | Based on the study of local wave method,the effect of sample frequency was discussed.It was proposed that oversampling is necessary by analyzing the influence of different sample frequency on the decomposition of sine wave. The relation between decomposition error and sample frequency was revealed and it was also proved that increasing the sample frequency can effectively reduce the error. |
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| Keywords: | local wave method Hilbert spectrum time-frequency analysis |
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