In this paper we present MEXEC - a lightweight on-board planning and execution system that monitors spacecraft state to robustly respond to current conditions. In addition it projects the remaining plan forward in time to detect conflicts and revise the plan. Most current planetary missions use sequence based commanding from the ground,which limits the ability to respond to on-board state varying from planned for state. This results in planning for worst-case execution time, power utilization, data volume and other resources and leads to under utilization of the spacecraft capability. It also limits the ability to respond to faults. Due to the high radiation environment at Jupiter the probability of flight software resets is high. Therefore, of particular interest to the planned Europa Mission is the capability to restart the science plan after flight software resets. In this paper we present results from running Europa flyby scenarios with flight software resets in the Europa flight software test environment. Preliminary results with the prototype scenario show MEXEC takes less than a tenth of a second to respond to resets. The development was done as part of Europa-focused flight software, but MEXEC was designed to be applicable to landers and rovers as well.


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    Titel :

    Autonomous Science Restart for the Planned Europa Mission with Lightweight Planning and Execution


    Beteiligte:
    Joshi, Rajeev (Autor:in) / Schaffer, Steve (Autor:in) / Rabideau, Gregg (Autor:in) / Gaines, Dan (Autor:in) / Verma, Vandi (Autor:in)

    Erscheinungsdatum :

    2017-06-18


    Medientyp :

    Preprint


    Format :

    Keine Angabe


    Sprache :

    Englisch



    Autonomous science restart for the planned Europa mission with lightweight planning and execution

    Joshi, Rajeev / Schaffer, Steve / Rabideau, Gregg et al. | NTRS | 2017


    MEXEC: autonomous science restart for the Europa mission

    Schaffer, Steve / Joshi, Rajeev / Rabideau, Gregg et al. | NTRS | 2016


    Autonomous Mission Execution

    Clark, R. / Association for Unmanned Vehicle Systems | British Library Conference Proceedings | 1993


    DEMO: autonomous science analysis, planning, and execution on the EO-1 mission

    Sherwood, R. / Chien, S. / Tran, D. et al. | NTRS | 2003


    Planned Europa Mission update: beyond payload selection

    Schimmels, Kathy / Kastner, Jason / Lewis, Kari et al. | NTRS | 2017