| 基于极值法和重心法的离散频谱校正方法 |
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| 引用本文： | 陈宏,孙俊杰,韩捷,郝伟.基于极值法和重心法的离散频谱校正方法[J].振动．测试与诊断,2012(Z1):141-145,156. |
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| 作者姓名： | 陈宏 孙俊杰 韩捷 郝伟 |
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| 作者单位： | 郑州大学振动工程研究所 |
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| 基金项目： | 河南省机械设计及传动系统重点实验室资助项目(编号:KFJZ200702);河南省教育厅自然科学研究计划资助项目(编号:2010B460014) |
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| 摘 要： | 针对多频率信号,在分析矩形窗函数的频谱泄漏特点的基础上,应用极值法搜索需校正的频率,然后用重心法求得校正后的频率、幅值和相位。该方法计算量小,能够快速找到需校正的谱线并进行校正,满足工程实时监测的需要。
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| 关 键 词： | 频谱泄漏 频谱校正 矩形窗 极值法 |
Correction Method for Discrete Spectrum Based on Energy Centrobaric Method and Extremum Method |
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| Chen Hong,Sun Junjie,Han Jie,Hao Wei.Correction Method for Discrete Spectrum Based on Energy Centrobaric Method and Extremum Method[J].Journal of Vibration,Measurement & Diagnosis,2012(Z1):141-145,156. |
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| Authors: | Chen Hong Sun Junjie Han Jie Hao Wei |
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| Affiliation: | (Institute of Vibration Engineering,Zhengzhou University Zhengzhou,450001,China) |
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| Abstract: | Aimed at multi-frequency signal,based on the analysis of spectral leakage feather of rectangular window,extremeum method is used to search the needed spectra to be corrected,and then the corrected frequencies,amplitudes and phases are calculated using energy centrobaric method.The method has low computational complexity,which can find the spectra to be corrected rapidly and correct them,and can meet the need of real-time monitoring in engineering.The results benefit the applying of correction technique of discrete spectrum in engineering. |
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| Keywords: | spectral leakage correction method of discrete spectrum rectangular window extremeum method |
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