Angles-only navigation during proximity operations suffers from a well-documented range-observability problem when a single camera is assumed to be at the center of mass of the host vehicle. Inspired by this range-observability problem, this paper explores relative-position/-velocity observability when a single camera is offset from vehicle center of mass. Within the context of the Clohessy-Wiltshire dynamics, it is shown that relative position and velocity are generally observable when the camera offset is included in the problem formulation, enabling a range observability without Δν requirements. Although special cases are identified when the state is unobservable, the conclusion is that the relative state is generally observable even in the case of v-bar station keeping during attitude hold when the angle measurements are constant. The thesis that state observability results when the motion of the camera does not obey the Clohessy-Wiltshire dynamics is presented.
Bibliographical noteFunding Information:
This research was conducted in part with the support and funding from the Lady Davis Fellowship Trust and the Asher Space Research Institute.
Copyright © 2013 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
ASJC Scopus subject areas
- Control and Systems Engineering
- Aerospace Engineering
- Space and Planetary Science
- Electrical and Electronic Engineering
- Applied Mathematics