Research on harmonic detection based on wavelet threshold and FFT algorithm
The fast Fourier transform (FFT) algorithm with window interpolation is the most commonly used and most effective method in harmonic analysis. However, the fast Fourier transform has a great dependence on the quality of the signal, and the existence of noise makes the detection result error. A harmo...
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Online Access: | http://dx.doi.org/10.1080/21642583.2018.1558420 |
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doaj-68fd41633ce749a5ac55a2aa40e8116b2020-11-25T00:34:24ZengTaylor & Francis GroupSystems Science & Control Engineering2164-25832018-09-016333934510.1080/21642583.2018.15584201558420Research on harmonic detection based on wavelet threshold and FFT algorithmShuaishuai Zhao0Chuanjiang Wang1Xiaoxue Bian2Shandong University of Science and TechnologyShandong University of Science and TechnologyShandong University of Science and TechnologyThe fast Fourier transform (FFT) algorithm with window interpolation is the most commonly used and most effective method in harmonic analysis. However, the fast Fourier transform has a great dependence on the quality of the signal, and the existence of noise makes the detection result error. A harmonic detection method based on wavelet threshold preprocessing noise elimination and windowed interpolation FFT algorithm is proposed in this thesis. Firstly, de-noising the selected signals, and the wavelet coefficients are used to select the wavelet threshold to eliminate the noise in the signal. Then the signal after the de-noising is analysed by the Nuttall window interpolate FFT algorithm, and the calculation formula is derived by using the amplitude information content of four spectral lines. The simulation results show that the proposed method is more accurate and effective to detect the signal after de-noising.http://dx.doi.org/10.1080/21642583.2018.1558420Wavelet thresholdFFT algorithmpolynomial fittingharmonic detection |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shuaishuai Zhao Chuanjiang Wang Xiaoxue Bian |
spellingShingle |
Shuaishuai Zhao Chuanjiang Wang Xiaoxue Bian Research on harmonic detection based on wavelet threshold and FFT algorithm Systems Science & Control Engineering Wavelet threshold FFT algorithm polynomial fitting harmonic detection |
author_facet |
Shuaishuai Zhao Chuanjiang Wang Xiaoxue Bian |
author_sort |
Shuaishuai Zhao |
title |
Research on harmonic detection based on wavelet threshold and FFT algorithm |
title_short |
Research on harmonic detection based on wavelet threshold and FFT algorithm |
title_full |
Research on harmonic detection based on wavelet threshold and FFT algorithm |
title_fullStr |
Research on harmonic detection based on wavelet threshold and FFT algorithm |
title_full_unstemmed |
Research on harmonic detection based on wavelet threshold and FFT algorithm |
title_sort |
research on harmonic detection based on wavelet threshold and fft algorithm |
publisher |
Taylor & Francis Group |
series |
Systems Science & Control Engineering |
issn |
2164-2583 |
publishDate |
2018-09-01 |
description |
The fast Fourier transform (FFT) algorithm with window interpolation is the most commonly used and most effective method in harmonic analysis. However, the fast Fourier transform has a great dependence on the quality of the signal, and the existence of noise makes the detection result error. A harmonic detection method based on wavelet threshold preprocessing noise elimination and windowed interpolation FFT algorithm is proposed in this thesis. Firstly, de-noising the selected signals, and the wavelet coefficients are used to select the wavelet threshold to eliminate the noise in the signal. Then the signal after the de-noising is analysed by the Nuttall window interpolate FFT algorithm, and the calculation formula is derived by using the amplitude information content of four spectral lines. The simulation results show that the proposed method is more accurate and effective to detect the signal after de-noising. |
topic |
Wavelet threshold FFT algorithm polynomial fitting harmonic detection |
url |
http://dx.doi.org/10.1080/21642583.2018.1558420 |
work_keys_str_mv |
AT shuaishuaizhao researchonharmonicdetectionbasedonwaveletthresholdandfftalgorithm AT chuanjiangwang researchonharmonicdetectionbasedonwaveletthresholdandfftalgorithm AT xiaoxuebian researchonharmonicdetectionbasedonwaveletthresholdandfftalgorithm |
_version_ |
1725313636450172928 |