Minimum-time low-thrust many-revolution geocentric trajectories with analytical costates initialization
Traditionally, indirect methods for trajectory optimization start with the non-intuitive guesses
of the initial costates, but it is difficult to generate the initial guesses for the low-thrust many …
of the initial costates, but it is difficult to generate the initial guesses for the low-thrust many …
Mapped adjoint control transformation method for low-thrust trajectory design
PJ Ayyanathan, E Taheri - Acta Astronautica, 2022 - Elsevier
Variational approach to optimal control theory converts trajectory optimization problems into
two-or multiple-point boundary-value problems, which consist of costates (ie, Lagrange …
two-or multiple-point boundary-value problems, which consist of costates (ie, Lagrange …
Generalized sail trajectory approximation with applications to MagSails
This paper investigates approximate solutions to the two-dimensional equations of motion of
a generalized sail-based spacecraft. A generalized sail is a propellantless propulsion …
a generalized sail-based spacecraft. A generalized sail is a propellantless propulsion …
Fast costate estimation for indirect trajectory optimization using Bezier-curve-based shaping approach
M Huo, L Yang, N Peng, C Zhao, W Feng, Z Yu… - Aerospace Science and …, 2022 - Elsevier
In this study, a fast costate estimation method derived from the Bezier-curve-based shaping
approach is proposed for indirect low-thrust transfer trajectory optimization. The trajectory is …
approach is proposed for indirect low-thrust transfer trajectory optimization. The trajectory is …
A machine learning method for the orbit state classification of large LEO constellation satellites
D Wang, F Li - Advances in Space Research, 2023 - Elsevier
Recently, large LEO constellation satellites have received much attention from the aspect of
Space Domain Awareness (SDA) due to their significant number and relatively complex orbit …
Space Domain Awareness (SDA) due to their significant number and relatively complex orbit …
[PDF][PDF] ELECTROCAM: assessing the effect of low-thrust uncertainties on orbit propagation
M Maestrini, A De Vittori… - 2nd ESA NEO and …, 2023 - re.public.polimi.it
In recent years low-thrust propulsion has become an alternative to chemical propulsion for
many different applications. Hence, it becomes necessary to have accurate and fast …
many different applications. Hence, it becomes necessary to have accurate and fast …
Milankovitch–Lyapunov Geostationary Satellite Stationkeeping
P Gurfil - Journal of Guidance, Control, and Dynamics, 2024 - arc.aiaa.org
Nomenclature e= eccentricity vector ed= desired eccentricity vector h= angular momentum
vector, km2∕ s hd= desired angular momentum vector, km2∕ s ke= control gain …
vector, km2∕ s hd= desired angular momentum vector, km2∕ s ke= control gain …
Nonlinear homotopy interior-point algorithm for 6-DoF powered landing guidance
K Chen, D Zhang, K Wang, Z Shao… - Aerospace Science and …, 2022 - Elsevier
The six-degree-of-freedom (6-DoF) powered landing guidance problem usually is difficult to
solve for several reasons. First, this problem coupled with low-frequency translational and …
solve for several reasons. First, this problem coupled with low-frequency translational and …
A quasi-linear local variational iteration method for orbit transfer problems
H Feng, X Yue, X Wang - Aerospace Science and Technology, 2021 - Elsevier
A novel Quasi-linear Local Variational Iteration Method (QLVIM) for solving two-point
boundary value problems (TPBVPs) of strongly nonlinear systems is proposed. With quasi …
boundary value problems (TPBVPs) of strongly nonlinear systems is proposed. With quasi …
Fuzzy Control for Spacecraft Orbit Transfer with Gain Perturbations and Input Constraint
S Nemmour, B Daaou, F Okello - International Journal of Robotics …, 2024 - pubs2.ascee.org
This paper presents the problem of fuzzy guaranteed cost tracking control for spacecraft orbit
transfer with parameter uncertainties and additive controller gain perturbations and subject …
transfer with parameter uncertainties and additive controller gain perturbations and subject …