Dual-quaternion immersion and invariance velocity observer for controlling asteroid-hovering spacecraft
Sign Up to like & getrecommendations! Published in 2019 at "Acta Astronautica"
DOI: 10.1016/j.actaastro.2019.04.044
Abstract: Abstract This paper investigates the velocity-free spacecraft pose tracking control in terms of dual quaternions, and its application to six-degrees-of-freedom (six-DOF) asteroid-hovering operation. First, a coupled linear velocity and angular velocity observer, driven by the… read more here.
Keywords: immersion invariance; velocity; spacecraft; velocity observer ... See more keywords
Statistical effects of the observer’s peculiar velocity on source number counts
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.107.103514
Abstract: The velocity of the Sun with respect to the cosmic microwave background (CMB) can be extracted from the CMB dipole, provided its intrinsic dipole is assumed to be small in comparison. This interpretation is consistent,… read more here.
Keywords: velocity observer; velocity; peculiar velocity; source number ... See more keywords
Attitude Control for a Rigid-Body With Dynamic Disturbance Based on Angular Velocity Observer
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3159979
Abstract: In this paper, we propose a geometric control law for attitude robust control problem of a rigid body system without angular velocity measurement. We suppose there is a disturbance related to angular velocity and attitude… read more here.
Keywords: velocity observer; control; velocity; angular velocity ... See more keywords