Abstract For the near-distance rendezvous problem of spacecraft, the classical guidance methods, such as R-bar and V-bar, are restricted by the initial relative positions and velocities and require a long period of time to rendezvous. In this paper, a new geometric guidance approach based on continuous low-thrust, which avoids the restrictions on initial states and decreases rendezvous time dramatically and has the advantages of robustness, is presented. First, based on the classical differential geometric curve theory, the dynamics equation of near-distance rendezvous is presented and a derivative term of spacecraft velocity is introduced, by which the relative velocity can be adjusted. Then, a spacecraft guidance curvature law is derived and one navigation ratio and two velocity feedback control gains are provided based on the analysis of motion in the normal and tangential directions of line-of-sight. Moreover, a method to improve the geometric guidance by using a modified linear-quadratic regulator, in which the time and the cost for rendezvous may be optimized by adjusting a ‘decay factor’, is proposed. Finally, numerical simulations about the selection of guidance parameters, about the comparison with the glideslope method, and about the guidance convergence with measurement errors, which prove the validity of the geometric approach for the rendezvous guidance problem of spacecraft, are presented.

    Highlights A geometric guidance method for spacecraft near-distance rendezvous is presented. A derivative term of spacecraft velocity is introduced to the curvature command. A modified linear-quadratic regulator is proposed to improve the guidance method. The performance of the method is compared with that of the glideslope method. The validity of the method is proved with numerical simulations.


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    Titel :

    A new geometric guidance approach to spacecraft near-distance rendezvous problem


    Beteiligte:
    Meng, Yunhe (Autor:in) / Chen, Qifeng (Autor:in) / Ni, Qing (Autor:in)

    Erschienen in:

    Acta Astronautica ; 129 ; 374-383


    Erscheinungsdatum :

    2016-09-29


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch








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