arXivDaily arXiv每日学术速递 周一至周五更新
看起来今天可以划水了
arXiv 1707.08024astro-ph.IMgr-qc
收藏

MICROSCOPE航天任务等效原理违反信号的确定:信号处理的优化

Determination of the Equivalence Principle violation signal for the MICROSCOPE space mission: optimization of the signal processing

Emilie Hardy, Agnès Levy, Gilles Métris, Manuel Rodrigues, Pierre Touboul

摘要:

显微镜空间飞行任务旨在以$10^{-15}$的精度检验等效原理。该测试是以无阻力微型卫星上的差分静电加速计提供的精确测量为基础的,该卫星包括两个圆柱形测试质量,置于同一引力场下,由不同材料制成。该实验包括测试施加在质量上的静电加速度的相等性,以使它们在已知的频率下保持相对静止。这种高精度的实验只与非常小的扰动兼容。然而,混叠产生于测量的有限时间跨度,并且被测量损耗放大。这些影响扰乱了测量分析。数值模拟已经运行,以估计在EP违规频率上的任何频率的扰动的贡献,并测试其与任务规范的兼容性。此外,不同的数据分析程序已被认为是选择一个最小化这些影响,考虑到有关的频率的不确定性的牵连信号。

英文摘要:

The MICROSCOPE space mission aims at testing the Equivalence Principle (EP) with an accuracy of $10^{-15}$. The test is based on the precise measurement delivered by a differential electrostatic accelerometer on-board a drag-free microsatellite which includes two cylindrical test masses submitted to the same gravitational field and made of different materials. The experiment consists in testing the equality of the electrostatic acceleration applied to the masses to maintain them relatively motionless at a well-known frequency. This high precision experiment is compatible with only very little perturbations. However, aliasing arises from the finite time span of the measurement, and is amplified by measurement losses. These effects perturb the measurement analysis. Numerical simulations have been run to estimate the contribution of a perturbation at any frequency on the EP violation frequency and to test its compatibility with the mission specifications. Moreover, different data analysis procedures have been considered to select the one minimizing these effects taking into account the uncertainty about the frequencies of the implicated signals.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑