Optimizing interplanetary trajectories with deep space maneuvers

Details Optimizing interplanetary trajectories with deep space maneuvers Optimizing interplanetary trajectories with deep space maneuvers

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gwu..reptr....n&link_type=abstract

M.S. Thesis George Washington Univ., Hampton, VA. Joint Inst. for Advancement of Flight Sciences.

Mathematics

Deep Space, Interplanetary Trajectories, Manned Mars Missions, Spacecraft Maneuvers, Trajectory Optimization, Manned Space Flight, Space Exploration, Trajectory Planning, Vectors (Mathematics)

Scientific paper

Analysis of interplanetary trajectories is a crucial area for both manned and unmanned missions of the Space Exploration Initiative. A deep space maneuver (DSM) can improve a trajectory in much the same way as a planetary swingby. However, instead of using a gravitational field to alter the trajectory, the on-board propulsion system of the spacecraft is used when the vehicle is not near a planet. The purpose is to develop an algorithm to determine where and when to use deep space maneuvers to reduce the cost of a trajectory. The approach taken to solve this problem uses primer vector theory in combination with a non-linear optimizing program to minimize Delta(V). A set of necessary conditions on the primer vector is shown to indicate whether a deep space maneuver will be beneficial. Deep space maneuvers are applied to a round trip mission to Mars to determine their effect on the launch opportunities. Other studies which were performed include cycler trajectories and Mars mission abort scenarios. It was found that the software developed was able to locate quickly DSM's which lower the total Delta(V) on these trajectories.

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