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Article Dans Une Revue Journal of Guidance, Control, and Dynamics Année : 2014

Minimizing the Effects of Navigation Uncertainties on the Spacecraft Rendezvous Precision

Résumé

The ability to robustly and precisely control the spacecraft relative motion will play an important role in future on-orbit inspection and on-orbit servicing missions. Model predictive control (MPC) is considered to be an effective control strategy for these types of spacecraft operations, which can easily handle mission specificconstraintswhileexplicitlyminimizingthefuelconsumption. The maneuvers plan is obtained by solving a finite horizon open- loop optimal control problem starting from the spacecraft relative state, and the optimal solution consists of a series of control actions out of which only the first one is executed. Some ideas from tube-basedMPCare used in this Note to solve the robust fixed-time spacecraft rendezvous problem for eccentric reference orbits. The purpose is to obtain a sequence of feedback policies that steers the spacecraft from an initial relative state toward an ellipsoidal set centered around a desired final state, in the presence of navigation uncertainties. This must be done while respecting the actuators saturation constraints and while pursuing a double objective: minimize the fuel cost of the mission and minimize the size of the arrival set to guarantee a good rendezvous precision. The control policies are restricted to affine disturbance feedback policies to ensure a convex formulation of the control synthesis problem. The obtained sequence of feedback policies drives the system to the guaranteed arrival set without any need for recurrent optimization.

Domaines

Automatique
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Dates et versions

hal-01078527 , version 1 (29-10-2014)

Identifiants

Citer

Georgia Deaconu, Christophe Louembet, Alain Théron. Minimizing the Effects of Navigation Uncertainties on the Spacecraft Rendezvous Precision. Journal of Guidance, Control, and Dynamics, 2014, 37 (2), pp.695-700. ⟨10.2514/1.62219⟩. ⟨hal-01078527⟩
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