Linear time-varying model predictive control of magnetically actuated satellites in elliptic orbits

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Three-axis attitude control using only magnetic actuators has been considered a difficult task due to earth's time-varying magnetic field, the inherent under-actuation associated with this task, and constraints on control dipole moments. In this study, a linear time-varying model predictive control approach is applied to magnetically actuated satellites in elliptic low-earth orbits for nadir and inertial pointing. A linear time-varying model predictive control problem is formulated using an augmented state-space model based on small-angle approximations for both nadir and inertial-pointing nonlinear dynamics models. To reduce the on-line computational load, the model predictive control design for an inertial-pointing problem with Laguerre functions is proposed, and exponential data weighting is used to improve the numerically ill-conditioned problem. Nonlinear simulation results demonstrate the effectiveness of the proposed method.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-10
Language
English
Article Type
Article
Keywords

SPACECRAFT ATTITUDE-CONTROL; LAGUERRE FUNCTIONS; STABILIZATION; STABILITY

Citation

ACTA ASTRONAUTICA, v.151, pp.791 - 804

ISSN
0094-5765
DOI
10.1016/j.actaastro.2018.07.029
URI
http://hdl.handle.net/10203/246920
Appears in Collection
AE-Journal Papers(저널논문)
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