Abstract This paper investigates the attitude control problem of a two-body combined spacecraft by considering the unilateral contact constraint on the active spacecraft's end-effector. Previous work has shown that this constraint may cause a relative sliding motion between the end-effector and the target, which has a large impact on the combined spacecraft dynamics and postcapture control process. In this paper, an extra degree-of-freedom approach is adopted and a new dynamical model is developed to efficiently describe the movement of the combined spacecraft in both rigid connecting and relative motion modes. A new control law is also developed to reduce the relative sliding motion between the end-effector and the target while controlling the attitude of the combined system. Simulation results show that the extra degree-of-freedom model proposed in this paper has the correct dynamic properties and that the newly developed controller is a significant improvement over traditional PD controllers in maintaining the geometric configuration of the combined spacecraft.

    Highlights The post-capture operation with unilateral contact constraint is studied. A new dynamic model is developed based on extra-degree-of-freedom approach. The modified reactionless controller is proposed to control the combined spacecraft.


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    Titel :

    An extra degree-of-freedom model for combined spacecraft attitude control with unilateral contact constraint


    Beteiligte:
    She, Yuchen (Autor:in) / Li, Shuang (Autor:in)

    Erschienen in:

    Acta Astronautica ; 165 ; 54-67


    Erscheinungsdatum :

    2019-07-27


    Format / Umfang :

    14 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch