基于改进数字时间序列频谱的振动分析

Vibration Analysis of Spectrum Based on Improved Digital Time Series

针对冷原子惯性测量设备对低频振动较为敏感的特性,对环境振动特性进行分析,针对低频环境振动特性的提取分析需求,提出了一种新的调节频域变换后各个频点附近数据的分辨率频谱变换方法,克服了传统分析方法低频段数据分辨率不足的问题,同时,该方法不仅能有效地处理频谱混叠问题,还能有效减小不合理加权变换对模拟信号频谱分析造成的影响。采用该频谱变换方法对实际测量数据进行了分析,确定该方法的有效性。

In view of the sensitive characteristics of cold atom inertial measurement equipment to low-frequency vibration,it is necessary to analyze the environmental vibration characteristics,especially the use requirements of extracting and analyzing the low-frequency environmental vibration characteristics.A new spectrum transformation method which can adjust the resolution of data near each frequency point after frequency domain transformation is summarized.At the same time,this method can not only effectively deal with the problem of spectrum aliasing,but also effectively reduce the impact of unreasonable weighted transformation on analog signal spectrum analysis.The spectrum transformation method is used to analyze the actual measurement data to determine the effectiveness of the method.