Given the benefits of coupling low-thrust propulsion with gravity assists, techniques for easily identifying candidate trajectories would be extremely useful to mission designers. We describe the computational implementation of an analytic, shape-based method for the design of low-thrust, gravity-assist trajectories. We also augment the method by allowing coast arcs to be patched with thrust arcs on the transfers between bodies. This approach permits not only rapid, broad searches over the design space, but also provides initial guesses for trajectory optimisation. Numerical examples are presented for an Earth-Mars-Ceres rendezvous trajectory and an Earth-Venus-Earth-Mars-Jupiter flyby trajectory.
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