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Minimum-Distance Collision-Free Trajectory Generation for Formation Flying Satellites Using a Hybrid Path-Planning Algorithm

Behzadpour, Saniya | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46055 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Banazadeh, Afshin
  7. Abstract:
  8. The formation flight of satellites corresponds to a group of small satellites, performing the mission of a presumed larger and more expensive satellite. Usually mission designers tend to put these satellites in such orbital configurations that their trajectories do not intersect. Although a stable configuration in a certain collision-free orbit is desirable for long term purposes, most of the missions including maneuvers like forming or changing a configuration and inserting new satellites need to be planned using a proper path planning algorithm. In this thesis, a path planning algorithm is suggested that acquires the optimal and impact-free trajectories for a group of satellites for performing different maneuvers. The algorithm calculates the minimal trajectories for each satellite with respect to its initial and desired orientations using b-spline curves. Then by inserting the requirements of synchronous movement of the satellites, the intersecting trajectories are omitted by using the middle point algorithm. Then guidance of the satellites on the resulted trajectories is implemented by considering a certain dynamic model for the satellites and using the genetic algorithm. Finally the trajectories that violate the dynamic constraints of each of the satellites are recalculated to result the final trajectories
  9. Keywords:
  10. Path Planning ; Trajectory Optimization ; Genetic Algorithm ; Formation Flight

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