A novel identification method for micro-vibration analysis of reaction wheel assembly

Yang, Lin; Wang, Yan-song; Wei, Lei

doi:10.1016/j.actaastro.2022.04.013

Cited by 7 publications

(1 citation statement)

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“…The SSOS two-dimensional (2D) turntable presented in this study is a typical mechanicalelectrical-control coupled system that generates disturbing forces and torques during the tracking rotation. These forces and torques are caused by manufacturing, assembly and control errors, posing a significant threat to spacecraft pointing and tracking stability, commonly known as the micro-vibration effect [4][5][6][7]. When these forces are coupled with structural modes, resonance will occur, which may cause catastrophic impacts in many fields, such as earthquakes [8,9].…”

Section: Introductionmentioning

confidence: 99%

Structural Flexibility Effect on Spaceborne Solar Observation System’s Micro-Vibration Response

Yang,

Wang,

Wei

et al. 2024

Aerospace

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The spaceborne solar observation system is crucial for the study of space phenomena such as solar flares, which requires high tracking accuracy. This study presents a coupling model that integrates mechanical, electrical, and control models to investigate the structural flexibility effect on the micro-vibration response. We established a rigid–flexible model using mechanical parts. We considered the influence of flexible features while studying the dynamic responses in its operation. The state-space equations of the system showed that modal frequency, damping, and modal participation factors played significant roles. We derived transfer functions using the Laplace transform of the coupling models to better understand this mechanism, and Simulink models were thereby established. We simulated the acceleration responses of the rigid–flexible and rigid models under angle tracking modes, and the results showed significant differences. We also simulated the acceleration responses of the models under various control frequencies, and the optimal control frequency was thus obtained. Finally, we performed experiments, and the results indicated that the rigid–flexible model could better predict the motion and acceleration responses for the spaceborne solar observation system. This study provides valuable information for understanding the role of flexible features in space performance high-tracking accuracy instruments and for micro-vibration suppression research.

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