Currently exploring and benchmarking common state estimators for the spacecraft rendezvous/docking problem.
Dynamics of the system are for a target-centered coordinate system, where the origin represents the target spacecraft. The goal of the problem is to rendezvous to the target spacecraft given a relative trajectory away from it and dock under the target spacecraft.
The simulation of this system assumes that the spacecraft follows the nonlinear ODE's specified in the "Chance-constrained model predictive control for spacecraft rendezvous with disturbance estimation" paper. It takes the ODE's formulated, and numerically solves the next steps of the spacecraft numerically using MATLAB's ODE solver.
The optimal controllers used in this repository all assume that the chaser spacecraft will follow the Hill-Clohessy-Wiltshire equations that approximately linearizes the above nonlinear dynamics.