摘要
对高超音速电弧风洞实验中探针系统测量到的等离子体密度扰动信号进行了有效的分析．将小波分析的方法首次引入到对高超音速电弧风洞中的静电探针信号的分析之中，获得了满意的结果．
The analysis of the probe signal in an hypersonic tunnel is important to the study on the characters of the hypersonic flow. As there are many transient processes in the tunnel, the FFT cannot work well in these occasions. By the use of wavelet transform, a high frequency fluctuation is identified in the presence of low frequency disturbance through the Zoned Wavelet Energy Spectrum. These results are conducive to studying the mechanism of instability in hypersonic wake.
