In space mission sets like on-orbit servicing and manufacturing, agents in close proximity may operate too close to yield resolved localization solutions to operators. This requires that the system maintain a catalog ...
详细信息
In space mission sets like on-orbit servicing and manufacturing, agents in close proximity may operate too close to yield resolved localization solutions to operators. This requires that the system maintain a catalog of its local neighborhood;however, this imposes a large burden on each agent to update its catalog. This paper considers the case of multiple satellites each maintaining their catalog. Specifically, this paper considers the case of numerous noncooperative objects and a collection of agents operating in the same local environment. The goal of each agent is to maintain their catalog of all bodies (objects and agents) within this neighborhood through onboard angles-only measurements and cooperative communication with the other agents. A central supervisor selects the target body for each agent, a local controller tracks the selected target body for each agent, and a local estimator coalesces both an agent's measurements and state estimates provided by neighboring agents within the communication graph. Numerical results are provided to demonstrate the supervisor's ability to select an appropriate target subject to an uncertainty threshold, the controller's ability to track the selected target, and the estimator's ability to maintain an accurate and precise estimate of each of the bodies in the local environment.
autonomousformation flight is a technical challenge of great interest for many scientific missions. Among other applications, the design of synthetic apertures is a promising benefit of using distributed spacecraft. ...
详细信息
autonomousformation flight is a technical challenge of great interest for many scientific missions. Among other applications, the design of synthetic apertures is a promising benefit of using distributed spacecraft. Even if numerous studies exist in the literature, the formationflying concepts and applications were until now rather theoretical. The TanDEM-X autonomous formation flying system presented in this paper will be implemented in the upcoming TanDEM-X mission and contributes as such to increase the readiness level of this technology. The paper focuses on the design of a guidance, navigation, and control system enabling the autonomous relative control of two spacecraft flying on near-circular orbits. Emphasis is given to the practical implementation within an onboard embedded computer, which requires a simple, resource-sparing, and robust design of the system. Therefore, the algorithms are tailored to minimize the usage of onboard resources and to allow the harmonious integration of the relative control system within the space segment. The validation of TanDEM-X autonomousformationflying performed using a hardware-in-the-loop testbed shows that control performance at the meter level is expected.
暂无评论