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Experimental demonstration of bias rejection from electrostatic accelerometer measurements

机译：静电加速度计测量中的偏置抑制的实验演示

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In order to test gravitation in the Solar System, it is necessary to improve the orbit restitution of interplanetary spacecrafts. The addition of an accelerometer on board is a major step toward this goal because this instrument measures the non-gravitational acceleration of the spacecraft. It must be able to perform measurements at low frequencies with no bias to provide an additional observable of interest. Since electrostatic accelerometers suffer a bias, a technological upgrade has been proposed by Onera. It consists in adding to an electrostatic accelerometer a rotating platform which allows modulating the signal of interest and retrieving it without bias after post-processing. Using this principle, a measurement method and a post-processing method have been developed. The objective of this article is to validate these methods experimentally. To do so, a horizontally controlled pendulum was used to apply a known signal to an accelerometer mounted on a rotating platform. The processing of the experimental data demonstrates the ability to make acceleration measurements with no bias. In addition, the experimental precision on the unbiased acceleration obtained after post-processing corresponds to the precision predicted theoretically.
机译：为了测试太阳系中的引力，有必要改善行星际飞船的轨道复原。在船上增加加速度计是朝着这个目标迈出的重要一步，因为该仪器可测量航天器的非重力加速度。它必须能够在无偏差的情况下进行低频测量，以提供额外的关注点。由于静电加速度计存在偏差，因此Onera提出了技术升级。它包括在静电加速度计上增加一个旋转平台，该旋转平台允许调制感兴趣的信号并在后处理后无偏差地检索该信号。利用这一原理，开发了一种测量方法和一种后处理方法。本文的目的是通过实验验证这些方法。为此，使用了水平控制的摆锤将已知信号施加到安装在旋转平台上的加速度计。实验数据的处理证明了在没有偏差的情况下进行加速度测量的能力。另外，后处理后获得的无偏加速度的实验精度与理论上预测的精度相对应。

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