An onboard trajectory planning algorithm is presented in this paper for the terminal area energy management (TAEM) phase of a reusable launch vehicle (RLV). To satisfy the multiple constraints in the TAEM phase, a profile in the flight-path angle vs. range-to-go space is planned. The optimization of this flight-path angle profile is described as a one-parameter search problem and solved by the Newton iteration method. With the optimized flight-path angle profile, a satisfied longitudinal flight trajectory is generated based on the flight dynamics. Testing for the trajectory planning algorithm is performed in missions with different terminal flight-path angle constraints. The onboard algorithm is indicated effective to generate a constrained longitudinal flight trajectory in 0.5 seconds on a PC. The Monte Carlo simulations are employed in dispersed cases, and the planning algorithm is shown robust in trajectory generation with large initial condition errors of the TAEM phase.


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    Titel :

    Onboard longitudinal trajectory planning for terminal area energy management of reusable launch vehicles


    Beteiligte:
    Liang, Zixuan (Autor:in) / Li, Qingdong (Autor:in) / Ren, Zhang (Autor:in) / Shao, Xingyue (Autor:in)


    Erscheinungsdatum :

    2014-08-01


    Format / Umfang :

    310247 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch