This paper analyses the impact of liquid fuel sloshing on the dynamics of a free-flying space robot, subject to low-gravity conditions. To date, no research and investigations were made to combine liquid fuel sloshing with free-floating robot dynamics. Thus, typical robotic motions for such a mission were analyzed and simulated first as rigid body motions. The satellite motion which results from the reaction to the robotic dynamic coupling was used as input for a dedicated computational fluid dynamics analysis (CFD). For slow motions, the results show relevant influence to the free-floating robot dynamics. However high dynamic motions, as they are needed for example for on-orbit dynamic identification, show a significant influence. Free-floating robot simulations with worst case configurations obtained from the CFD analysis showed a significant influence on the performance. Additionally a pendulum and a spring-mass model as equivalent mechanical model (EMM) were used for comparison with the CFD results. A nonlinear parameter identification was carried out to match the EMM models to obtain the same sloshing characteristics as the CFD results.


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    Title :

    Analysis of liquid fuel sloshing on free-floating robot dynamics under low-gravity condition


    Contributors:


    Publication date :

    2018-03-01


    Size :

    2310023 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    FUEL SLOSHING UNDER ZERO-GRAVITY

    LIAUGMINAS, TA | AIAA | 1965



    Lateral sloshing in cylinders under low-gravity conditions

    Masica, W. J. / Salzman, J. A. | NTRS | 1969


    CFD Analysis of Fuel Tank to Reduce Liquid Sloshing

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    Lateral sloshing in cylinders under low-gravity conditions

    Salzman, Jack A. / Masica, William J. | TIBKAT | 1969