This paper considers the problem of controlling both position and attitude states for a formation flying system using only thrusters. A coupled six degree of freedom position and attitude model is derived, where the coupling comes from the gravity gradient torque. Furthermore, the J2 perturbation, mass variation, thruster model, and thruster layout are considered. A globally stable chattering free sliding mode robust controller is designed with respect to functional bounded uncertainties. Based on the studies of open-loop responses, the range of control parameters is properly selected to avoid thruster saturation. A genetic algorithm is then applied to select the controller parameters. Both position and attitude states in a formation are precisely and continuously controlled for more than two years without recharging, using the selected electronic ion engine.
Sliding Mode Control and Optimization for Six DOF Satellite Formation Flying Considering Saturation
J of Astronaut Sci
The Journal of the Astronautical Sciences ; 53 , 4 ; 433-443
01.12.2005
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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