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Optimal Satellite Aided Capture of Spacecraft Around Jupiter

Rasoulzadeh Darabad, Ali | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50714 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Asadian, Nima
  7. Abstract:
  8. In this thesis, satellite aided capture of spacecraft around Jupiter is optimized with the final goal of capture into a circular orbit around Europa. The cost functions of the multi-objective optimization process that should be minimized are: 1) summation of the propulsive ΔVs, 2) the total duration of the capture scenario, and 3) the integral flux of the energetic electrons and protons during the maneuvers. In this study, the spacecraft trajectory is modeled by patched conics method and is optimized by metaheuristic methods of genetic algorithm and simulated annealing. In some cases, interior point method is used for improving the final converged solution. Due to the limitations of computational resources, only scenarios involving single, double, and triple flybys are considered. The results of this study includes Pareto fronts of dual objective optimization of ΔV-time and triple objective optimization of ΔV-time-radiation. Also, there have been found some promising trajectories, which are more than twenty percent efficient in terms of ΔV with respect to the direct capture around Europa. Moreover, some new illustrative graphs are developed to visually help the knowledge about the behavior of the system. In this way, it is found that which satellites are effective for gravity assist in minimization of each objective function
  9. Keywords:
  10. Optimal Capacity ; Trajectory Optimization ; Gravity-Assist Maneuver ; Satellite-Aided-Capture Around Jupiter

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