Flight demonstration of spaceborne real-time angles-only navigation to a noncooperative target in low earth orbit
| Autor: | Gabriella Gaias, Jean-Sébastien Ardaens |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Raumflugbetrieb und Astronautentraining
Aerospace Engineering 02 engineering and technology Kinematics Formation-flying 01 natural sciences Flight demonstration Computer Science::Robotics Extended Kalman filter Software 0203 mechanical engineering 0103 physical sciences Computer vision Visibility 010303 astronomy & astrophysics Autonomy Simulation Formation flying 020301 aerospace & aeronautics business.industry Rendezvous Angles-only navigation Debris removal Geography Filter (video) Trajectory Orbit (dynamics) Artificial intelligence AVANTI business Noncooperative rendezvous |
| Popis: | The paper describes the onboard vision-based navigation software employed during the DLR's AVANTI experiment and presents its flight performance. The navigation task relies on a dedicated target detection module in charge of extracting the line-of-sight observations from the images taken by a monocular camera. The recognition of the target is based on the kinematic identification of its trajectory over a sequence of images. Subsequently, the resulting angles-only measurements are validated dynamically and processed by an Extended Kalman Filter to derive in real-time the relative state estimate. A computationally light implementation of the filter is achieved by the use of an analytical relative motion model. Two autonomous rendezvous to a noncooperative object have been performed in orbit, first from 13 km to 1 km separation, then from 3 km to 50 m. Despite the poor visibility conditions and the strong orbit perturbations encountered at low altitude, the filter was able to supply the onboard guidance and control algorithms with accurate and reliable relative state estimation, enabling thus a safe and smooth approach. |
| Databáze: | OpenAIRE |
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