Abstract Feasibility of achieving reliable control for spacecraft formation keeping and reconfiguration without the need for thrust in either the radial or along-track direction is explored in this paper. Analysis of the linearized dynamics without along-track input indicates the presence of an uncontrollable eigenvalue at the origin. A nonlinear controller is designed to indirectly stabilize the uncontrollable modes to a stable manifold around the equilibrium. Conditions for robustness against unmatched uncertainties and disturbances are derived to establish the regions of asymptotic stabilization. The benefits of the proposed control method are also validated via numerical simulations to show that precise formation maintenance can be achieved by dealing with the issues of system nonlinearities, variations in initial conditions, and external disturbances, concurrently.

    Highlights Formation control without the need for thrust in radial or along-track directions. A nonlinear controller designed to indirectly stabilize the uncontrollable modes. Conditions for robustness against unmatched uncertainties and disturbances. Simulation results and stability analysis validate the proposed control strategy.


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    Title :

    Robust stationkeeping and reconfiguration of underactuated spacecraft formations


    Contributors:
    Godard (author) / Dev Kumar, Krishna (author) / Zou, Anmin (author)

    Published in:

    Acta Astronautica ; 105 , 2 ; 495-510


    Publication date :

    2014-10-04


    Size :

    16 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English








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    Free access