Time-Shifting Correcting Method of Phase Difference on Discrete Spectrum

DING Kang; LUO Jiang-kai; XIE Ming

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Article Navigation > Applied Mathematics and Mechanics > 2002 > 23(7): 729-735

DING Kang, LUO Jiang-kai, XIE Ming. Time-Shifting Correcting Method of Phase Difference on Discrete Spectrum[J]. Applied Mathematics and Mechanics, 2002, 23(7): 729-735.

Citation:

DING Kang, LUO Jiang-kai, XIE Ming. Time-Shifting Correcting Method of Phase Difference on Discrete Spectrum[J]. Applied Mathematics and Mechanics, 2002, 23(7): 729-735.

Citation:

DING Kang, LUO Jiang-kai, XIE Ming. Time-Shifting Correcting Method of Phase Difference on Discrete Spectrum[J]. Applied Mathematics and Mechanics, 2002, 23(7): 729-735.

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Time-Shifting Correcting Method of Phase Difference on Discrete Spectrum

1.
Department of Mechatronic Engineering, Shantou University, Shantou, Guangdong 515063, P R China;
2.
Department of Mechanical Engineering, Chongqing University, Chongqing 400044, P R China

Received Date: 2000-07-27
Rev Recd Date: 2002-04-25
Publish Date: 2002-07-15

Abstract

Abstract

A general method called time-shifting correcting method of phase difference on discrete spectrum is presented. That is, the second discrete-time sequence lags behind the first one with L points, then performing N-point FFT analysis on both sequences, and finally correcting spectrum by making use of the phase difference of two corresponding peak lines. The method proposed by XIE Ming et al is just the particular case of this method in the case that L is equal to N. Simulation result shows that this method is easily carried out with high precision, applicable for all kinds of symmetrical window functions and having high ability of anti-noise.
- spectrum analysis,
- correction,
- signal processing,
- phase difference

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References(10)

References

[1]	丁康,谢明.离散频谱三点卷积幅值校正法的误差分析[J].振动工程学报,1996,9(1):92-98.
[2]	朱利民,钟秉林,黄仁.离散频谱多点卷积幅值修正法的理论[J].振动工程学报,1999,12(1):120-125.
[3]	XIE Ming,DING Kang.Correction for the frequency,amplutud and phase in FFT of harmonic signal[J].Mechanical System and Signal Processing,1996,10(2):211-221.
[4]	丁康,张晓飞.频谱校正理论的发展[J].振动工程学报,2000,13(1):14-22.
[5]	谢明,丁康.频谱分析的校正方法[J].振动工程学报,1994,[STHZ]7(2):172-179.
[6]	谢明,丁康,莫克斌.频谱校正时谱线干涉的影响和判定方法[J].振动工程学报,1998,11(1):22-28.
[7]	刘进明,应怀樵.FFT谱连续细化分析的傅立叶变换法[J].振动工程学报,1995,8(2):162-166.
[8]	刘渝.正弦波频率快速估计方法[J].数据采集与处理,1998,13(1):7-11.
[9]	谢明,张晓飞,丁康.频谱分析中相位和频率校正的一种新方法-相位差校正法[J].振动工程学报,1999,12(4):454-459.
[10]	丁康,谢明.离散频谱的幅值.相位和频率的新校正方法及误差分析[J].动态分析与测试技术,1996,14(1):10-29.