TY - GEN
T1 - A preliminary framework and feasibility study for spacecraft disturbance source detection and isolation with distributed inertial sensors
AU - Augustyniak, Adam J.
AU - Hanley, David
AU - Bretl, Timothy
AU - Hejmanowski, Neil J.
AU - Carroll, David L.
N1 - Publisher Copyright:
© 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2021
Y1 - 2021
N2 - In this paper, we propose a framework for the use of distributed inertial sensors to detect and isolate disturbance sources that might—without subsequent mitigation—have a negative impact on spacecraft pointing accuracy. Common sources of disturbance that have been observed on prior space missions include unbalanced reaction wheels, vibrating cryocoolers, flexing solar panels, and drive mechanisms, among many other examples. Dynamic interactions between disturbance sources like these can lead to micro-vibrations (oscillatory accelerations or specific forces in different parts of the spacecraft structure) and then in turn to jitter (high-frequency angular motion of a sensor). While measurements of jitter often provide little information about disturbance sources, measurements of the underlying micro-vibrations—if made, in particular, by a distributed set of inertial sensors that are co-located with candidate sources of disturbance—could, in principle, reveal which disturbance sources are active or are not behaving nominally and hence are likely to be causing jitter. We derive our framework through analysis of several case studies from prior space missions and show its feasibility through preliminary experiments with a ground-based hardware model.
AB - In this paper, we propose a framework for the use of distributed inertial sensors to detect and isolate disturbance sources that might—without subsequent mitigation—have a negative impact on spacecraft pointing accuracy. Common sources of disturbance that have been observed on prior space missions include unbalanced reaction wheels, vibrating cryocoolers, flexing solar panels, and drive mechanisms, among many other examples. Dynamic interactions between disturbance sources like these can lead to micro-vibrations (oscillatory accelerations or specific forces in different parts of the spacecraft structure) and then in turn to jitter (high-frequency angular motion of a sensor). While measurements of jitter often provide little information about disturbance sources, measurements of the underlying micro-vibrations—if made, in particular, by a distributed set of inertial sensors that are co-located with candidate sources of disturbance—could, in principle, reveal which disturbance sources are active or are not behaving nominally and hence are likely to be causing jitter. We derive our framework through analysis of several case studies from prior space missions and show its feasibility through preliminary experiments with a ground-based hardware model.
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M3 - Conference contribution
AN - SCOPUS:85099853960
SN - 9781624106095
T3 - AIAA Scitech 2021 Forum
SP - 1
EP - 16
BT - AIAA Scitech 2021 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
Y2 - 11 January 2021 through 15 January 2021
ER -