In the context of Solar System exploration, autonomous planetary surface missions represent, nowadays, an important step in scientific research. Nevertheless, the design of landing Guidance, Navigation and Control sub-systems is one of the most challenging and complex tasks. Indeed, during the propelled landing phase, the system must be controlled in closed-loop, ensuring the stability of the lander motion with a certain level of robustness. This paper proposes a novel procedure for the verification of the lander nominal and robust stability. The first step is to perform a model simplification, in order to reduce the involved degrees of freedom and allow a decoupled analysis of the rotational and translational dynamics. Then, the classical stability theorems are applied, taking also into account the uncertainties due to actuators and sensors. Next, a robustness stability verification is performed by means of μ-Analysis. Finally, a Monte Carlo campaign is carried out, using an End-to-End simulator in order to verify, in the time domain, the reliability of the analytical stability analysis. The procedure is applied to a case study representing a descent module during the controlled landing phase on the Mars surface.


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    Titel :

    GNC Robustness Stability Verification for an Autonomous Lander



    Erscheinungsdatum :

    2020-01-01



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629



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