Optimal solar sail planetocentric trajectories

Computer Science – Numerical Analysis

Scientific paper

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Computer Programs, Numerical Analysis, Solar Sails, Trajectories, Boundary Value Problems, Equations Of Motion, Trajectory Analysis, Transfer Orbits

Scientific paper

The analysis of solar sail planetocentric optimal trajectory problem is described. A computer program was produced to calculate optimal trajectories for a limited performance analysis. A square sail model is included and some consideration is given to a heliogyro sail model. Orbit to a subescape point and orbit to orbit transfer are considered. Trajectories about the four inner planets can be calculated and shadowing, oblateness, and solar motion may be included. Equinoctial orbital elements are used to avoid the classical singularities, and the method of averaging is applied to increase computational speed. Solution of the two-point boundary value problem which arises from the application of optimization theory is accomplished with a Newton procedure. Time optimal trajectories are emphasized, but a penalty function has been considered to prevent trajectories which intersect a planet's surface.

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