Abstract The re-entry flight velocity of hypersonic vehicles is extremely high. If the trajectory precision can be improved in the optimization phase, the burden on the flight control system can be effectively reduced. Based on the phenomenon that the velocity of vehicle moving around the center of mass is small during the re-entry, a quasi-static assumption of the pitching motion for the re-entry vehicle is proposed. That is, the instantaneous balance of its pitching torque is assumed, and the torque balance is taken as the path constraint. Thus, a trajectory optimization method is established while considering the quasi-static assumption of pitching motion. When the minimum heating rate of the stagnation point or the smoothest trajectory is used as the optimization objective, respectively. Compared to traditional trajectory optimization methods that treat the vehicle as a mass point, the trajectory optimization method considers the quasi-static assumption of pitching motion, which can improve trajectory accuracy by an order of magnitude. In addition, solving the trajectory takes less than twice as long. This method can provide a reference for the offline/online trajectory design of re-entry vehicles.


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    Titel :

    Trajectory optimization of hypersonic vehicle considering the quasi-static assumption of pitch motion


    Beteiligte:
    Ma, Shoudong (Autor:in) / Yang, Yuxin (Autor:in) / Yang, Hua (Autor:in) / Chen, Weifang (Autor:in)


    Erscheinungsdatum :

    2024-02-05




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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