Abstract A direct optimization method has been developed and utilized to compute a wide range of optimal low-thrust interplanetary trajectories. This method replaces the optimal control problem with a nonlinear programming problem which in turn is solved by using sequential quadratic programming. The direct approach is capable of modeling multiple powered and coast arcs, planetary gravity assists, and constant-thrust and variable-thrust electric propulsion systems. The advantages of the direct approach include reduction in the design space, ease of establishing good initial guesses for the design parameters, and improved flexibility for handling “mixed” optimal control problems with continuous control functions and discrete control parameters. Numerical results are presented for three interplanetary mission examples and the results from the direct method show an excellent match with published optimal trajectories. In addition, optimal trajectories are obtained for a new low-thrust interstellar transfer problem.


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    Title :

    Optimal Low-Thrust Interplanetary Trajectories by Direct Method Techniques


    Contributors:


    Publication date :

    1997




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.60 Raumfahrttechnik
    Local classification TIB:    770/7040





    Optimal Low-Thrust Interplanetary Trajectories by Direct Method Techniques

    Kluever, C. A. / American Astronautical Society / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1996



    Optimal Interplanetary Trajectories Utilizing Constant Radial Thrust and Gravitational Assists

    Trask, Aaron / Mason, William / Coverstone, Victoria | AIAA | 2002