Extension of Traditional Frequency and Research on Time-Frequency Distribution

Shu Lin Liu; Xian Ming Wang; Hui Wang; Hai Feng Zhao

doi:10.4028/www.scientific.net/AMM.44-47.2089

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 44-47Extension of Traditional Frequency and Research on...

Extension of Traditional Frequency and Research on Time-Frequency Distribution

Abstract:

The concept of traditional frequency is extended and the concept of local frequency is proposed, which makes the physical meaning of frequency clearer. The wide adaptability of local frequency is also discussed. Moreover, a novel time-frequency analysis method is presented based on local frequency. The time-frequency distribution of continuous triangular wave signal is analyzed by the novel approach. Compared with wavelet transform and Hilbert-Huang transform (HHT), the results show that the concept of local frequency is correct and the novel time-frequency approach is effective.

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Periodical:

Applied Mechanics and Materials (Volumes 44-47)

Pages:

2089-2093

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.44-47.2089

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Online since:

December 2010

Authors:

Shu Lin Liu, Xian Ming Wang, Hui Wang, Hai Feng Zhao

Keywords:

Hilbert-Huang Transform (HHT), Local Frequency, Time-Frequency Distribution, Wavelet Transform (WT)

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