| 湍流信号分析中小波基的对比和选取 |
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| 引用本文： | 张斌,王彤,谷传纲,戴正元.湍流信号分析中小波基的对比和选取[J].工程热物理学报,2011(4):585-588. |
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| 作者姓名： | 张斌 王彤 谷传纲 戴正元 |
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| 作者单位： | 上海交通大学动力机械及工程教育部重点实验室;特灵空调亚太研发中心; |
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| 基金项目： | 国家自然科学基金资助项目(No.50776056) |
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| 摘 要： | 采用小波分析处理湍流脉动信号时,不同的小波基往往会带来不同的分析结果.为了尽可能准确地提取湍流流动的多尺度特征,研究并建立湍流信号处理中适宜小波基选取的合理方法是十分必要的.基于湍流时频特性,结合信息熵理论,建立了以品质因数和特征谱熵值为评价指标的小波基选取方法.以计算分析三组不同湍流信号的小波基为例,结果进一步验证了...
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| 关 键 词： | 小波基 湍流信号 时频特性 信息熵 |
Comparison and Selection of Wavelet Functions in Turbulent Signal Processing |
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| ZHANG Bin WANG Tong GU Chuan-Gang DAI Zheng-Yuan.Comparison and Selection of Wavelet Functions in Turbulent Signal Processing[J].Journal of Engineering Thermophysics,2011(4):585-588. |
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| Authors: | ZHANG Bin WANG Tong GU Chuan-Gang DAI Zheng-Yuan |
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| Institution: | ZHANG Bin~1 WANG Tong~1 GU Chuan-Gang~1 DAI Zheng-Yuan~2 (1.Key Lab.for Power Machinery and Engineering,Shanghai Jiaotong University,Shanghai 200240,China,2.Trane's Asia-Pacific Research Center,Shanghai 200001,China) |
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| Abstract: | Different wavelet function leads to the different analysis results when processing turbulent signal by wavelet analysis.In order to get the multi-scale characteristics of turbulent flow as precisely as possible,it's necessary to establish some rational selection methods of wavelet function in turbulent signal processing.Based on time-frequency characteristics and information entropy theory,a reasonable method is put forward here to determine proper wavelet functions in turbulent signal processing.Characteri... |
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| Keywords: | wavelet function turbulence signal time-frequency characteristics information entropy |
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