Adaptive thrust vector control during on-orbit servicing
2014 (English)In: AIAA SPACE 2014 Conference and Exposition: San Diego, CA, 4 - 7 August 2014, American Institute of Aeronautics and Astronautics, AIAA , 2014Conference paper (Refereed)
On-orbit servicing missions often include a final propulsive phase where a spacecraft pushes the other one towards a different orbit. Specifically this is the case of the debris grasping mission where the chaser, after capturing the target by means of robotic arms, has to perform a de-orbit operation. The large thrust involved needs a perfect alignment with respect to the center of mass or the system composed by chaser and target, in order to avoid attitude changes. Such accurate alignment is quite difficult to achieve especially when the characteristics of the target are not perfectly known. A procedure is proposed in this paper, allowing a complete estimation of the center of mass position and of the moments of inertia of the system, starting from the data obtained by the gyros mounted on board of the spacecraft. The output is used to design a maneuver for correcting the target and chaser relative position by moving the robotic arms. Numerical simulations show the proficiency and the applicability of the estimation algorithm and of re-alignment maneuver to a selected mission scenario.
Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, AIAA , 2014.
Research subject Onboard space systems
IdentifiersURN: urn:nbn:se:ltu:diva-37827Local ID: bf703937-7907-44eb-9a6d-459c19f36937ISBN: 9781624102578 (print)OAI: oai:DiVA.org:ltu-37827DiVA: diva2:1011325
Upprättat; 2014; 20160331 (andbra)2016-10-032016-10-032016-12-27