Magnetometer calibration technique for the ground-based stage of spacecraft system diagnostics
Authors: Akimov I.O., Ilukhin S.N., Ivlev N.A., Kolosov G.E.
Published in issue: #5(77)/2018
DOI: 10.18698/2308-6033-2018-5-1762
Category: Aviation and Rocket-Space Engineering | Chapter: Ground Complexes, Launch Equipment, Aircraft Exploitation
The article lists empirical techniques for thermal calibration and accounting for intrinsic error in magnetometers used in onboard measurement equipment of modern spacecraft. We developed a mathematical model of magnetometer readings that takes into account current measurement errors and provided a geometrical interpretation of errors. We present the relationship between readings of typical magnetic sensors and ambient temperature. We formulated a thermal calibration technique for instrument readings that ensures instrument accuracy at different temperatures. We introduce an approach to determining a transformation matrix connecting magnetometer coordinate systems that makes it possible to eliminate component positioning errors occurring during magnetometer assembly; we also describe development testing algorithms approved by the core enterprise for gathering data required for implementing the techniques under consideration. We provide the results of calibrating a magnetometer using the techniques developed
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