Closed-loop magnetic control of a spin-stabilized satellite

Rodden, J.

doi:10.1016/0005-1098(84)90082-7

Cited by 7 publications

(1 citation statement)

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“…Much prior work has been done to investigate the use of magnetic torques in spacecraft attitude control. However, that work has largely focused on the use of magnetic torque in spin-stabilized spacecraft [7], [8] or in gravity gradient stabilized spacecraft [9], [10]. The satellite considered in this paper is not gravity gradient stabilized; in fact, the desired attitude corresponds to a gravity gradient unstable equilibrium, so a control law is needed that establishes pointing despite being hindered, rather than aided, by the gravity gradient torque.…”

Section: Nomenclaturementioning

confidence: 99%

Attitude Control of a 2U Cubesat by Magnetic and Air Drag Torques

Sutherland

Kolmanovsky

Girard

2019

IEEE Trans. Contr. Syst. Technol.

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This paper describes the development of a magnetic attitude control subsystem for a 2U cubesat. Due to the presence of gravity gradient torques, the satellite dynamics are open-loop unstable near the desired pointing configuration. Nevertheless the linearized timevarying system is completely controllable, under easily verifiable conditions, and the system's disturbance rejection capabilities can be enhanced by adding air drag panels exemplifying a beneficial interplay between hardware design and control. In the paper, conditions for the complete controllability for the case of a magnetically controlled satellite with passive air drag panels are developed, and simulation case studies with the LQR and MPC control designs applied in combination with a nonlinear timevarying input transformation are presented to demonstrate the ability of the closed-loop system to satisfy mission objectives despite disturbance torques.

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