Harmonics Analysis Based on FFT of Special Hanning Interpolation Combined with Wavelet Transform

Abstract:

In view of the problem that harmonics analysis by fast Fourier Transform can appear a higher error and the serious phenomenon of harmonics leakage and fence, it is put forward that a improved arithmetic that FFT of special Hanning interpolation combined with wavelet transform. It is proved by theory analysis and simulation calculation that: FFT arithmetic of special Hanning interpolation can raise the precision of steady-state harmonics analysis validly. And wavelet transform arithmetic can analyze time-varying harmonics and sudden-changing harmonics precisely. The arithmetic of wavelet transform combined with FFT can remedy the defects of harmonics analysis by FFT and analyze harmonics precisely, timely and validly.

• Periodical: Applied Mechanics and Materials (Volumes 195-196)
• Pages: 777-782
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.195-196.777
• Online since: August 2012
• Authors: Yun Dong Cao, Xing Gang Chen
• Keywords: FFT, Hanning, Harmonics Analysis, Wavelet Transform (WT)

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