کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
730069 | 892950 | 2013 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Experimental demonstration of bias rejection from electrostatic accelerometer measurements Experimental demonstration of bias rejection from electrostatic accelerometer measurements](/preview/png/730069.png)
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.
► We validate a method to reject the bias from electrostatic accelerometer measurement.
► The conditions for bias rejection are tested experimentally.
► The experimental precision on the unbiased acceleration agrees with the prediction.
► Unbiased measurements of spacecraft accelerations improve gravitation tests.
Journal: Measurement - Volume 46, Issue 4, May 2013, Pages 1411–1420