Time-Domain Smoothing Processing for Equivalence-Principle Test Using Free-Fall Method
Zhou Ze-Bing; Wang Shi-Fang; Luo Jun; Zhou Ze-Bing; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074; Wang Shi-Fang; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074; Luo Jun; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
Журнал:
Chinese Physics Letters
Дата:
2005-07-01
Аннотация:
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.
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