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信号时域平均处理的新算法
引用本文:刘红星,屈梁生.信号时域平均处理的新算法[J].振动工程学报,1999,12(3):344-347.
作者姓名:刘红星  屈梁生
作者单位:南京航空航天大学民航学院!南京210016(刘红星,左洪福,姜澄宇),西安交通大学机械学院!西安710049(屈梁生)
摘    要:时域平均是从混有噪声的复杂周期信号中提取感兴趣周期分量的常用方法,但在其实施时往往由于周期截断误差的存在而不能取得满意的效果。本文提出了信号时域平均处理的新算法,基本上解决了周期截断误差对平均结果的影响问题。分析验证说明:新算法比过去的旧算法效果好得多

关 键 词:信号处理  时域分析  时域平均  周期截断误差

A New Algorithm of Time Domain Averaging
Liu,Hongxing,Zuo,Hongfu,Jiang,Chengyu.A New Algorithm of Time Domain Averaging[J].Journal of Vibration Engineering,1999,12(3):344-347.
Authors:Liu  Hongxing  Zuo  Hongfu  Jiang  Chengyu
Abstract:Time domain averaging (TDA) is a common method to extract a periodic component of interest from a noisy compound signal. With the period of the interesting component determined, some segments in the same length of the period are often consecutively cut out from the compound signal to be averaged. In such averaging based on digital computers, the period actually used usually possesses some errors, here called period cutting error, which is less than half a sampling interval. It has been found that there is a large bad influence of the period cutting error on the above traditional TDA. A new algorithm for TDA is introduced. In the new algorithm, the segments are quasiconsecutively cut out to prevent the period cutting error from accumulating, which basically solves the problem caused by the period cutting error. With some tests and analyses, it is shown that the new algorithm is much better than the original one.
Keywords:signal  processing  time  domain  analysis  time  domain  averaging  period  cutting  error
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