IDENTIFICATION OF HIGH FREQUENCY SIGNAL UNDER LOW SAMPLING RATIO

Zhang Yisong; Yi Liyan

Chinese

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IDENTIFICATION OF HIGH FREQUENCY SIGNAL UNDER LOW SAMPLING RATIO

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- IDENTIFICATION OF HIGH FREQUENCY SIGNAL UNDER LOW SAMPLING RATIO
- Vol. 3, Issue 1, (1988)
- 作者机构：
  
  南京航空学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1988
- 稿件说明：
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Zhang Yisong, Yi Liyan. IDENTIFICATION OF HIGH FREQUENCY SIGNAL UNDER LOW SAMPLING RATIO[J]. 1988, 3(1).
DOI：

Zhang Yisong, Yi Liyan. IDENTIFICATION OF HIGH FREQUENCY SIGNAL UNDER LOW SAMPLING RATIO[J]. 1988, 3(1). DOI：

摘要

对于航空涡喷发动机等旋转机械

其叶片振动信号的提取已由接触式发展到非接触式。转子每转一周

每个叶片经过探头位置一次

产生一次采样。所以探头对单个叶片信号的平均采样率等于转子的运转速率。而根据采样定理

截止频率(Nyguist频率)fc为采样频率fs的一半(fc=fs/2)。

Abstract

Considering that the highest resolving frequncy in dynamic data is restricted by sampling ratio

a new method is proposed to identify the high frequency signal from three low-ratio sampling spectra. The complicated case of vibration measurement ofrotary blades is investigated with error analysis and illustratrated by a numerical example.

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