An attitude control actuator of a spacecraft includes a first momentum wheel driven in rotation by a motor and a second momentum wheel. Both momentum wheels are movable in rotation about an axis and are mechanically coupled by coupling means imposing between a rotation speed ω1 of the first momentum wheel and a rotation speed ω2 of the second momentum wheel a ratio R=ω2/ω1, negative on the one hand and continuously modifiable by the coupling means in response to a command on the other hand so as to modify the total angular momentum of the actuator while the total kinetic energy of the wheels are kept constant. In one embodiment, both momentum wheels have the same inertia and are coupled through a toroidal variable rotation speed drive, where ratio R varies between −3 and −⅓. The motor drives the momentum wheels and operates as a generator for braking the momentum wheels.


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    Titel :

    Actuator with transfer of angular momentum for the attitude control of a spacecraft


    Beteiligte:
    SPERANDEI JEAN (Autor:in)

    Erscheinungsdatum :

    10.11.2015


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B64G Raumfahrt , COSMONAUTICS