4 papers
An Equivariant Filter for Spacecraft Nonlinear Relative Navigation with Range and Bearing Measurements
Gil Serrano, Bruno J. Guerreiro, Pedro Lourenço +1
Relative navigation is a fundamental task in space proximity operations and autonomous rendezvous. The nonlinear relative orbital dynamics are equivariant and admit a semidirect pr…
Equivariant Observer for Bearing Estimation with Linear and Angular Velocity Inputs
Gil Serrano, Marcelo Jacinto, Bruno J. Guerreiro +1
This work addresses the problem of designing an equivariant observer for a first order dynamical system on the unit-sphere. Building upon the established case of unit bearing vecto…
Equivariant Filter Cascade for Relative Attitude, Target's Angular Velocity, and Gyroscope Bias Estimation
Gil Serrano, Pedro Lourenço, Bruno J. Guerreiro +1
Rendezvous and docking between a chaser spacecraft and an uncooperative target, such as an inoperative satellite, require synchronization between the chaser spacecraft and the targ…
Equivariant Filter for Relative Attitude and Target's Angular Velocity Estimation
Gil Serrano, Bruno J. Guerreiro, Pedro Lourenço +1
Accurate estimation of the relative attitude and angular velocity between two rigid bodies is fundamental in aerospace applications such as spacecraft rendezvous and docking. In th…