Fuel-optimal low-thrust trajectory optimization using indirect method and successive convex programming
Although the robustness of indirect methods is enhanced by the homotopic approach and
switching detection technique when applied to fuel-optimal low-thrust trajectory optimization …
switching detection technique when applied to fuel-optimal low-thrust trajectory optimization …
Improving low-thrust trajectory optimization by adjoint estimation with shape-based path
INTERPLANETARY exploration with ion thrusters has been attracting much attention in
recent decades, owing to the specific impulse of an ion thruster generally 10 times higher …
recent decades, owing to the specific impulse of an ion thruster generally 10 times higher …
Neural networks in time-optimal low-thrust interplanetary transfers
In this paper, neural networks are trained to learn the optimal time, the initial costates, and
the optimal control law of time-optimal low-thrust interplanetary trajectories. The aim is to …
the optimal control law of time-optimal low-thrust interplanetary trajectories. The aim is to …
Exploiting manifolds of L1 halo orbits for end-to-end Earth–Moon low-thrust trajectory design
In this work, end-to-end low-thrust transfers from a GTO orbit to a low-altitude lunar orbit by
exploiting the manifolds of a chosen Earth–Moon L 1 halo orbit has been studied. The …
exploiting the manifolds of a chosen Earth–Moon L 1 halo orbit has been studied. The …
Bounding homotopy method for minimum-time low-thrust transfer in the circular restricted three-body problem
X Pan, B Pan, Z Li - The Journal of the Astronautical Sciences, 2020 - Springer
Solving minimum-time low-thrust orbital transfer problems in the three-body problem by
indirect methods is an extremely difficult task, which is mainly due to the small convergence …
indirect methods is an extremely difficult task, which is mainly due to the small convergence …
Homotopy method for optimization of variable-specific-impulse low-thrust trajectories
Z Chi, H Yang, S Chen, J Li - Astrophysics and Space Science, 2017 - Springer
The homotopy method has been used as a useful tool in solving fuel-optimal trajectories
with constant-specific-impulse low thrust. However, the specific impulse is often variable for …
with constant-specific-impulse low thrust. However, the specific impulse is often variable for …
Indirect optimization for finite thrust orbit transfer and cooperative rendezvous using an initial guess generator
F Ren, R Li, J Xu, C Feng - Advances in Space Research, 2023 - Elsevier
In this paper, the finite thrust nonplanar transfer and cooperative rendezvous are
investigated. The indirect method is adopted in the optimization process. The energy-optimal …
investigated. The indirect method is adopted in the optimization process. The energy-optimal …
A data-driven indirect method for nonlinear optimal control
Nonlinear optimal control problems are challenging to solve due to the prevalence of local
minima that prevent convergence and/or optimality. This paper describes nearest-neighbors …
minima that prevent convergence and/or optimality. This paper describes nearest-neighbors …
Systematic low-thrust trajectory optimization for a multi-rendezvous mission using adjoint scaling
A deep-space exploration mission with low-thrust propulsion to rendezvous with multiple
asteroids is investigated. Indirect methods, based on the optimal control theory, are …
asteroids is investigated. Indirect methods, based on the optimal control theory, are …
Long-term capture of asteroids to the Sun-Earth L1/L2 using a lunar flyby and station-keeping maneuvers
M Tan, K Zhang, H Li - Advances in Space Research, 2023 - Elsevier
Long-term capture of near-Earth asteroids to Sun-Earth L 1/L 2 libration point orbits using a
lunar flyby and station-keeping maneuvers is investigated in this paper. The model of the …
lunar flyby and station-keeping maneuvers is investigated in this paper. The model of the …