ISSN:
1662-7482
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Because of the deficiency of fixed kernel in bilinear time-frequency distribution (TFD),i.e. for each mapping, the resulting time-frequency representation is satisfactory only for a limitedclass of signals, a new adaptive kernel function named the radial parabola kernel (RPK), isproposed. The RPK can adopt the optimizing method to filter cross-terms adaptively according tothe signal distribution, obtain good time-frequency resolution, and offer improved TFD for a largeclass of signals. Compared with traditional fixed -kernel functions, such as Wigner-Villedistribution, Choi-Willams distribution and Cone-kernel distribution, the superiority of the RPKfunction is obvious. At last, the RPK function is applied to the analysis of vibration signals ofbearing, and the result proves the RPK function an effective method in analyzing signals
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/38/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.10-12.737.pdf
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