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Observer-based body-frame hovering control over a tumbling asteroid
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DOI：10.1016/j.actaastro.2014.05.016.png)
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Observer-based hovering control over a tumbling asteroid in the body-fixed frame is studied. An extended Kalman filter (EKF) is used to process range measurements from a small collection of ground stations, yielding estimates of the spacecraft state vector and the gravitational parameters of the asteroid assuming a second degree and order gravity field model. The estimated states are used in the optimal feedback control algorithm which consists of two alternatives: time-varying LQR or the Lyapunov-Floquet transformation (LFT) and time-invariant LQR. The closed-loop response of the system and the control effort required are investigated and compared for both control strategies. (C) 2014 IAA. Published by Elsevier Ltd. All rights reserved.
Keyword:
Tumbling asteroid
Continuous control
Time-varying LQR
Lyapunov-Floquet transformation
Extended Kalman filter
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3.4
论文数:
1.2W
被引数:
2.1W
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