Highlights An indirect impact strategy with optimal impact direction is proposed to deflect potential hazard asteroids. The particle swarm optimization algorithm (PSO) is applied to search for the optimal impact angle. The deviation of asteroids with various strategies is compared. The results show that better performance of deflection can be obtained.

    Abstract In this paper, an optimal deflection strategy is proposed to deflect potential hazard asteroids (PHAs) by impacting small asteroids. In this method, the spacecraft is first launched to rendezvous with a candidate asteroid. The candidate asteroid is selected by analyzing the maximum fuel consumption of the spacecraft. The spacecraft flies with the small asteroid, and then it moves the small asteroid to impact the PHA. The particle swarm optimization algorithm (PSO) is applied to search for the optimal impact angle between the small asteroid and the PHA after determining the initial mass of the spacecraft that meets the requirements by using genetic algorithm (GA). Finally, optimizations are carried out to obtain the maximum deviation of the PHA’s orbit to the Earth. Numerical results show that the optimal impact angle plays a significant role in deflecting the PHA. Furthermore, the comparison between the approach with the optimal impact direction and the indirect impact method with centroid impact shows different deflection performances. In addition, direct impact strategies are compared with the method proposed in this paper. The result shows that the deviation of PHA with our approach is better than the direct kinetic impact method when the proper small asteroid is selected and the initial mass of the spacecraft is more than a specific value.


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    Titel :

    Optimal deflection strategy of potential hazard asteroids by impacting small asteroids


    Beteiligte:
    Tan, Minghu (Autor:in) / Ma, Bingbing (Autor:in) / Shen, Hong (Autor:in) / Chai, Bin (Autor:in)

    Erschienen in:

    Advances in Space Research ; 71 , 10 ; 4239-4255


    Erscheinungsdatum :

    2022-12-15


    Format / Umfang :

    17 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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