Decoupling Control of Electromagnetic Formation Flight in Near-Earth Orbit

Electromagnetic formation flight uses the electromagnetic interaction between satellites to provide control maneuvers for formation satellites, with the advantages of no propellant consumption, long life, and high flexibility. The dynamics of electromagnetic formation satellites have the characteristics of nonlinearity and strong coupling. The frequency division multiplexing strategy has significant advantages in decoupling the system's dynamics. This paper studies the 6-DOF control of electromagnetic formation in near-earth orbit with the frequency division multiplexing method. The active disturbance rejection control method is proposed for realizing the stability of electromagnetic satellites in the presence of external disturbance, model uncertainties, and high uncertainty caused by alternating magnetic fields. In addition, the electromagnetic force envelope is introduced to optimize the assignment of magnetic dipoles. The simulation results show the effectiveness of the proposed control method.