This paper extends and completes a previous investigation performed by the same authors, dedicated to the problem of minimizing the control propellant in the Next Generation Gravity Mission (NGGM). The NGGM aims to measure the temporal variations of the Earth’s gravity field by laser tracking between pairs of satellites in low Earth orbit. In the reference scenario addressed in this paper, the satellites shall operate for at least 7 years at low ≈350 km circular altitude, and active disturbance control (drag control) is required; specifically, all six components of the force/torque acting on the satellite are actively controlled by a set of electric thrusters. The previous work solved the optimization problem for a nominal (no redundancy considered) set of 8 mini-thrusters (FCT, 1-mN class) plus 1 larger thruster (DCT, 10-mN class). In this work, a more realistic mission scenario is addressed taking into account real-world requirements and constraints including functional thruster redundancy to ensure single-failure tolerance and realistic thrust levels and thrust ranges compatible with existing ion thruster types. The results show feasibility with complete single-failure tolerance using 1 + 1 DCT and 8 + 2 FCTs.


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    Title :

    Advances in the Control Propellant Minimization for the Next Generation Gravity Mission


    Additional title:

    Springer Optimization


    Contributors:


    Publication date :

    2023-04-30


    Size :

    31 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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