| 局域波法的多分辨分析特性及其应用 |
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| 引用本文： | WANG Feng-li,王凤利,邢辉,段树林,马孝江.局域波法的多分辨分析特性及其应用[J].大连海事大学学报(自然科学版),2007,33(1):119-122. |
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| 作者姓名： | WANG Feng-li 王凤利 邢辉 段树林 马孝江 |
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| 作者单位： | 大连海事大学,轮机工程学院,辽宁,大连,116026;大连理工大学,机械工程学院,辽宁,大连,116024 |
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| 摘 要： | 局域波法通过局域波分解和瞬时频率的求解,将任何复杂的信号分解成为有限数目并且具有一定物理意义的基本模式分量,每一个分量描述了时变信号中不同频率和尺度范围的固有振动模式,所获得的各分量局域波时频分布具有多分辨分析特征.由于局域波分解是自适应的,它的多分辨分析特征也是自适应的.经理论分析与对变速箱轴承座处拾取的振动信号的分析验证了方法的有效性,局域波法为工程测试中的时频分析提供了一种有效的手段.
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| 关 键 词： | 局域波法 多分辨分析 时频分析 非平稳 轴承 |
| 文章编号： | 1006-7736(2007)01-0119-04 |
| 修稿时间： | 2006-06-08 |
Multi-resolution analysis of local wave method and its application |
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| WANG Feng-li.Multi-resolution analysis of local wave method and its application[J].Journal of Dalian Maritime University,2007,33(1):119-122. |
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| Authors: | WANG Feng-li |
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| Institution: | 1. Marine Eng. College, Dalian Maritime Univ., Dalian 116026, China; 2. Mechanical Eng. School, Dalian Univ. of Teehnol. , Dalian 116024,China |
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| Abstract: | Local wave method can decompose any complicated signal into a finite number of intrinsic mode functions(IMF) by using Local wave decomposition and defining instantaneous frequency and local wave functions,which is based on the instantaneous frequency of signals.Every IMF describes different frequency and scale of the inherence oscillation mode.Multi-resolution analysis of local wave timefrequency distribution can give enough information in both time domain and frequency domain.After theoretical analysis and experimental simulation,local wave method is proved to be efficient and can provide the engineering world good means for time-frequency analysis. |
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| Keywords: | local wave method multi-resolution analysis time-frequency analysis non-stationary bearing |
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