旋转平台上静电加速度计的无偏加速度测量
Unbiased acceleration measurements with an electrostatic accelerometer on a rotating platform
摘要：
Gravity Advanced Package是一种由称为MicroSTAR的静电加速度计和称为Bias Rejection System的旋转平台组成的仪器。其目的是无偏差地测量航天器的非重力加速度。设想将其搭载在行星际航天器上，作为测试引力定律的工具。MicroSTAR基于Onera的经验，继承了在轨技术。旋转平台的增加是一项技术升级，允许使用静电加速度计在无偏置的低频下进行测量。为此，偏置抑制系统旋转MicroSTAR，使感兴趣的信号与频域中仪器的偏置分离。进行这些无偏的低频测量需要对数据进行后处理。为此目的开发的信号处理技术是本文的重点。它允许给出从感兴趣的信号中完全去除偏差的条件。无偏测量的精度可以充分表征：给定子系统的特性，对于3 h的积分时间，在非重力加速度上可以达到1 pm s $^{-2}$的精度。
英文摘要：
The Gravity Advanced Package is an instrument composed of an electrostatic accelerometer called MicroSTAR and a rotating platform called Bias Rejection System. It aims at measuring with no bias the non-gravitational acceleration of a spacecraft. It is envisioned to be embarked on an interplanetary spacecraft as a tool to test the laws of gravitation. MicroSTAR is based on Onera's experience and inherits in orbit technology. The addition of the rotating platform is a technological upgrade which allows using an electrostatic accelerometer to make measurements at low frequencies with no bias. To do so, the Bias Rejection System rotates MicroSTAR such that the signal of interest is separated from the bias of the instrument in the frequency domain. Making these unbiased low-frequency measurements requires post-processing the data. The signal processing technique developed for this purpose is the focus of this article. It allows giving the conditions under which the bias is completely removed from the signal of interest. And the precision of the unbiased measurements can be fully characterized: given the characteristics of the subsystems, it is possible to reach a precision of 1 pm s$^{-2}$ on the non-gravitational acceleration for an integration time of 3 h.
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。
