Instantaneous Frequency Identification of Signals Based on Improved Synchrosqueezing Wavelet Transform

被引：0
|
作者：
Liu J. [1 ]
Zheng J. [1 ]
Zheng W. [2 ]
Huang W. [1 ]
机构：
[1] School of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou
[2] School of Civil Engineering, Fujian University of Technology, Fuzhou
来源：
| 1600年 / Nanjing University of Aeronautics an Astronautics卷 / 37期
关键词：
Improved synchrosqueezing wavelet transform; Instantaneous frequency; Non-stationary signal; Time-frequency analysis; Time-varying structure;
D O I：
10.16450/j.cnki.issn.1004-6801.2017.04.028
中图分类号：
学科分类号：
摘要：
Synchrosqueezing wavelet transform can get better frequency resolution by reassigning the time-frequency representation of wavelet transform. However, the diffusion along frequency domain can be suppressed while the diffusion along the time axis cannot be overcome. To address this issue, an improved synchrosqueezing wavelet transform is employed to enhance the accuracy of estimated instantaneous characteristic parameters in both time and frequency directions where we highly focus on. Two numerical simulations and a cable test with linearly and sinusoidal varying tension forces are used to verify the effectiveness and accuracy of the proposed method. The results demonstrate that the improved synchrosqueezing wavelet transform is appropriate for identifying parameters of time-varying structures with both better time and frequency resolutions in a specific region. © 2017, Editorial Department of JVMD. All right reserved.
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页码：814 / 821
页数：7
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