This study focuses on the online thrust-loss state identification and trajectory optimization problem during the asteroid probe powered descent process where thrust-loss fault occurs. First, according to the probe's thruster configuration structure, a powered descent dynamic model of the probe and a trajectory optimization model with thrust-loss constraints are established. In addition, this article proposes an online thrust-loss identification model based on the moving horizon estimation method. By combining the results of online thrust-loss identification, the trajectory replanning problem considering thrust-loss constraints is researched on the Bezier shape-based method, which can quickly generate feasible and relatively optimal trajectories. Finally, numerical simulations and analyses are performed to verify the effectiveness of the thrust-loss identification model and the probe powered descent trajectory replanning strategy proposed in this article. The proposed methods can ensure the soft-landing of the probe on a predetermined target, even if a thrust-loss fault occurs during the probe powered descent process.


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    Title :

    Asteroid Descent Trajectory Optimization With Online Thrust-Loss Identification


    Contributors:
    Feng, Wenyu (author) / Fan, Zichen (author) / Qi, Ji (author) / Huo, Mingying (author) / Qi, Naiming (author)


    Publication date :

    2025-04-01


    Size :

    1720048 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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