A path based approach for optimizing low-thrust interplanetary trajectories

We use a path based approach to find optimal spacecraft trajectories. The algorithm searches for the control and states that generate a trajectory that is dynamically consistent. The path functions allow ephemeris constraints to be directly enforced ensuring that the trajectory solves the targeting problem. The numerical method used to solve the resulting optimization problem uses a Taylor approximation of the cost function and the constraints. Search directions are selected such that they maintain the constraint equations to the first order and cause a decrease in the cost function. Linear and nonlinear optimal feedback control laws are derived around the nominal optimal trajectory.

Duke Scholars

Author Alec Gallimore Thomas Lord Department of Mechanical Engineering and Materia ...