63 citations · 120 across the 8 of their papers we have counts for
8 papers
LQR Design For Formation Flying Near Halo Orbits Exploiting Quasi-Periodic Symmetry In Toroidal Coordinates
Joaquin G. Lopez-Cepero, Rafael Vazquez, Julio C. Sanchez
This work presents the design of a Linear Quadratic Regulator for relative motion control near periodic orbits in the Circular Restricted Three-Body Problem (CR3BP), formulated in…
B-spline shaping for low-thrust interplanetary rendezvous
Julio C. Sanchez
Rapid preliminary design of low-thrust interplanetary rendezvous trajectories requires parameterizations that combine computational efficiency, flexibility, and sufficient solution…
Orbit-Attitude Predictive Control in the Vicinity of Asteroids with In Situ Gravity Estimation
Julio C. Sanchez, Rafael Vazquez, James D. Biggs +1
This paper presents an integrated model-learning predictive control scheme for spacecraft orbit-attitude station-keeping in the vicinity of asteroids. The orbiting probe relies on…
Event-Based Impulsive Control for Spacecraft Rendezvous Hovering Phases
Julio C. Sanchez, Christophe Louembet, Francisco Gavilan +1
This work presents an event-triggered controller for spacecraft rendezvous hovering phases. The goal is to maintain the chaser within a bounded region with respect to the target. T…
Chance-constrained Model Predictive Control for Near Rectilinear Halo Orbit spacecraft rendezvous
Julio C. Sanchez, Francisco Gavilan, Rafael Vazquez
This work presents a robust Model Predictive Controller (MPC) to solve the problem of spacecraft rendezvous in the context of the restricted three-body problem (R3BP) as will be re…
A flatness-based predictive controller for six-degrees of freedom spacecraft rendezvous
Julio C. Sanchez, Francisco Gavilan, Rafael Vazquez +1
This work presents a closed-loop guidance algorithm for six-degrees of freedom spacecraft rendezvous with a passive target flying in an eccentric orbit. The main assumption is that…
Simultaneous navigation and mascon gravity estimation around small bodies
Julio C. Sanchez, Hanspeter Schaub
This manuscript develops a simultaneous navigation and gravity estimation strategy around a small body. The scheme combines dynamical model compensation with a mascon gravity fit.…
Manoeuvre detection in Low Earth Orbit with Radar Data
Jose M. Montilla, Julio C. Sanchez, Rafael Vazquez +3
This work outlines and assesses several methods for the detection of manoeuvres in Low Earth Orbit (LEO) from surveillance radar data. To be able to detect manoeuvres, the main sta…