一种新的非平稳信号分析方法－局域波分析

张海勇

一种新的非平稳信号分析方法－局域波分析

张海勇

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出版历程
- 收稿日期: 2002-09-23
- 修回日期: 2002-12-23
- 刊出日期: 2003-10-19

A new method for analyzing nonstationary signal-local wave analysis

Zhang Haiyong

摘要

摘要: 该文介绍一种新的非平稳信号分析方法一局域波分析。该方法源于瞬时频率的概念,它能把动态信号的局部特征正确地在时频域内予以描述。局域波分解的基不是固定的,而是随动态信号波形的变化而变化,具有自调节自适应的特征。与传统的时频分析方法相比,局域波分析有很多优点,它是分析非平稳信号的一般方法。该文讨论了局域波分析的应用,指出了该方法需进一步研究的有关问题。
- 非平稳信号; 瞬时频率; 局域波分析; 局域波分解; 基本模式分量; 时频分析
Abstract: A new method for analyzing nonstationary signal designated as local wave analysis is introduced. It stems from the concept of instantaneous frequency, and it can describe accu-rately the local properties of dynamic data in the time-frequency plane. The basis of local wave decomposition is not fixed but changeable with the changing wave shape of the dynamic data. The decomposition is adaptive, and therefore highly efficient. Compared with the available time-frequency analysis methods, this method has many advantages. It is commonly used for analyzing nonstationary signal. The application of this method is discussed, and the related problems in this field that need further study are pointed out, too.

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参考文献(1)

N.E. Huang, Z. Shen, S. R. Long, et al., The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis, Proc. Roy. Soc., London. A,1998, 454, 903-995.[2]马孝江,余泊,张志新,等,一种新的时频分析方法-局域波法,振动工程学报,2000,13(增刊),24-29.[3]B. Boashash, Estimating and interpreting the instantaneous frequency of a signal, Part Ⅰ: Fundamnentals, Proc. IEEE, 1992, 80(4), 520-538.[4]L. Cohen, Time-Frequency Analysis, Englewood Cliffs, NJ, Prentice-Hall, 1995, Chapter 1.[5]W.K. Melville, Wave modulation and breakdown, J. Fluid Mech., 1983, 128(3), 489-506.[6]张海勇,基于局域波法的非平稳随机信号分析中若干问题的研究,[博士论文],大连,大连理工大学,2001.[7]Yu Bo, Ma Xiaojiang, A new method for the analysis of non-stationary nonlinear vibration signal and its use in machine fault diagnosis, Proc. of ICVE, Dalian, 1998, 668-671.[8]张海勇,马孝江,盖强,一种新的时变参数AR模型分析方法,大连理工大学学报,2002,42(2),238-241.[9]Zhang Haiyong, Ma Xiaojiang, GaiQiang, Wigner-Ville distribution based on intrinsic mode functions, Proc. of ICR, Beijing, 2001, 1015-1017.[10]张海勇,方差平稳随机信号的一种处理方法,电子与信息学报,2002,24(12),1879-1884.[11]X. Zhu, Z. Shen, S. D. Eckermann, et al., Gravity wave characteristics in the middle atmosphere derived from the empirical mode decomposition method, J. Geophys. Res., 1997, 102(D14),16545-16561.[12]N.E. Huang, Z. Shen, S. R. Long, A new view of nonlinear water waves: the Hilbert spectrum,Annu. Rev. Fluid Mech., 1999, 31, 417-457.[13]Zhang Haiyong, Ma Xiaojiang, Gai Qiang, The marginal spectrum of Hilbert spectrum and its applications in machinery faults diagnosis, Proc. of APVC, Hangzhou, 2001, 901-903.

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