Towards a Magnetically Clean Reaction Wheel with Active Magnetic Field Mitigation

Nicolai, Anja; Stoltz, S.; Hillenmaier, O.; Ludwig, J.; Strauch, C.; Grivon, D.; Rossini, Leopoldo; Onillon, E.; Hellwig, T.; Scheiding, Sebastian

doi:10.23919/aeroemc.2019.8788947

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…In the acceleration's current spectrogram, the spectral content varies and stops when the wheel reaches the maximum speed at 38 s. The highest peak of the current follows the B-field, and it relates to the speed by a factor of 12; details can be found in Table I, where the reaction wheel speed, the two maximum B-field frequencies (Freq.1 and Freq.2), the frequency peak of current, and the ratio between current peak frequency and the wheel speed are listed. According to previous studies to understand the reaction wheel performance [3], the higher frequencies observed in the B-field spectrum are related to the speed of…”

Section: A Time-frequency Domain Analysismentioning

confidence: 92%

“…The motor originates a rotation on the flywheel producing an angular momentum compensated by a motion in the opposite direction, moving the spacecraft. Controlling electromagnetic interference (EMI) is even more important as recent space scientific missions require lower levels of magnetic field emissions to conduct experiments onboard [1], [2], [3], [4], [5], [6]. In fact, reaction wheels can compromise scientific data, and sometimes, results have to be discarded.…”

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confidence: 99%

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Time-Domain Electromagnetic Characterization of Reaction Wheel for Space Applications

Pous

Zhao

Azpúrua³

et al. 2023

IEEE Trans. Electromagn. Compat.

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The electromagnetic characterization of reaction wheels is crucial to comply with the demanding ac magnetic field cleanliness requirements of space science missions, thus, preventing interference on sensitive onboard instrumentation. Therefore, a complete assessment, including the measurement of the magnetic flux vector at different operational modes and under dynamic conditions, is proposed as a contribution beyond conventional testing methodologies. This article investigates the worst-case magnetic field emissions experimentally, using a test setup based on a multichannel acquisition and multidomain postprocessing system. The focus of the measurement campaign was on the low-frequency range (10 Hz-2 kHz). Moreover, capturing the B-field in the timedomain enabled further analysis, that is, complementary outputs for understanding the electromagnetic performance of the reaction wheel. As a result, we can relate the wheel rotation with the current and the magnetic fields, compute the field orientation, and evaluate in-band interference for the magnetic field.

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Section: A Time-frequency Domain Analysismentioning

confidence: 92%