Spacecraft employing low-thrust propulsion must be able to recover from an event in which the spacecraft stops thrusting due to an unforeseen problem. Extra propellant is carried to allow the spacecraft to reach its target in the form of propellant margin. An automated method is presented for estimating the propellant margin a spacecraft should carry. The method is applied to three cases: a transfer to Mars, a gravity-assist trajectory to the asteroid Psyche, and a solar sail transfer to the near-Earth asteroid 1991 VG. Examining different power levels for the Mars transfer, it is shown that a 5% margin is sufficient to recover from a 20 days missed thrust for a 10 kW spacecraft, whereas a 15% margin is required for a 20 kW spacecraft. The gravity-assist case exhibits greater sensitivity to missed thrust, but this problem is alleviated by adding a coast arc before the gravity assist in the nominal case. For the solar sail mission, a spacecraft outage of more than 10 days late in the mission may delay arrival by more than 200 days. The effect of missed thrust on a trajectory must be assessed on a mission-by-mission basis, and it cannot be adequately managed with a general guideline. Presented as Paper 2014-4224 at the AIAA/AAS Astrodynamics Specialist Conference, San Diego, CA, 4-7 January 2015


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    Titel :

    Automated Missed-Thrust Propellant Margin Analysis for Low-Thrust Trajectories



    Erschienen in:

    Erscheinungsdatum :

    2015




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    BKL:    55.60 Raumfahrttechnik
    Lokalklassifikation TIB:    770/7040





    Automated Missed-Thrust Propellant Margin Analysis for Low-Thrust Missions to Mars and a Near-Earth Asteroid (AIAA 2014-4224)

    Laipert, F.E. / Longuski, J. / American Institute of Aeronautics and Astronautics; American Astronautical Society | British Library Conference Proceedings | 2014


    Low-Thrust Trajectory Optimization For Maximum Missed Thrust Recovery Margin

    CK Venigalla / Jacob Englander / Daniel J Scheeres | NTRS


    Low-Thrust Trajectory Optimization For Maximum Missed Thrust Recovery Margin

    C. Venigalla / J. Englander / D. J. Scheeres | NTIS | 2020