Optimal, Low-Thrust, Path-Constrained Transfers between Libration Point Orbits using Invariant Manifolds

Low-thrust transfers between libration point orbits can be applied in many potential mission scenarios, such as extended science missions or cargo transport. This investigation considers the inclusion of a variable speci c impulse engine into a primer vector-based, fuel optimizing transfer strategy. A multiple shooting procedure with analytical gradients yields rapid solutions and o ers an investigation into the trade space between ight time and consumption of fuel mass. Path and performance constraints can be included at node points along the thrust arc. Integration of invariant manifolds into the design strategy, for greater fuel savings, may also yield improved performance.