Time-Domain Smoothing Processing for Equivalence-Principle Test Using Free-Fall Method
Time-Domain Smoothing Processing for Equivalence-Principle Test Using Free-Fall Method
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DOI：
10.1088/0256-307x/22/7/015
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发表时间：
2005-07
影响因子：
3.5
通讯作者：
Zhou Zebing;Wang Shi-fang;L. Jun
中科院分区：
文献类型：
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作者：
Zhou Zebing;Wang Shi-fang;L. Jun
我们调查的效果，时域平滑处理的等效原理测试使用自由落体的方法，相比，低通滤波器的方法。理论计算表明，时域平滑处理可以抑制高频噪声，并且不会产生伪加速度。其物理原因是时域平滑处理方法是一种不加权的滤波，与多项式拟合无关。时域平滑处理后，扩展旋转体等效原理试验中高频机械振动引起的不确定加速度差可从2 μ Gal抑制到0.05 μ Gal。
We investigate the effect of the time-domain smoothing processing for the equivalence-principle test using the free falling method, compared to the low-pass-filter method. Theoretical calculation shows that the time-domain smoothing processing can suppress the high-frequency noises and does not cause pseudo-acceleration. The physical reason is that the time-domain smooth-processing method is an unweighted filtering and is unrelated to the polynomial fitting. The uncertain acceleration difference due to high-frequency mechanical vibrations in the equivalence-principle test for extended rotating bodies can be suppressed from 2 μGal to 0.05 μGal after the time-domain smoothing processing.