Overview of Flight Guidance, Navigation, and Control for the DLR Reusability Flight Experiment (Refex)
DOI: 10.13009/EUCASS2019-739 8TH EUROPEAN CONFERENCE FOR AERONAUTICS AND SPACE SCIENCES (EUCASS) Conference on “Reusable Systems for Space Access”. July 1–4, 2019, Madrid, Spain. Overview of Flight Guidance, Navigation, and Control for the DLR Reusability Flight Experiment (ReFEx) 1⋆ 2 3 4 5 René Schwarz †, Daniel Kiehn ‡, Guilherme F. Trigo †, Bronislovas Razgus †, Andreas Wenzel †, 6 7 8 9 10 David Seelbinder †, Jan Sommer §, Stephan Theil †, Markus Markgraf ¶, Michael Dumke †, 11 12 13 14 15 Martín Reigenborn †, Matias Bestard Körner †, Marco Solari †, Benjamin Braun ¶, Dennis Pfau § † German Aerospace Center (DLR), Institute of Space Systems Robert-Hooke-Str. 7, DE–28359 Bremen, Germany ‡ German Aerospace Center (DLR), Institute of Flight Systems Lilienthalplatz 7, DE–38108 Braunschweig, Germany § German Aerospace Center (DLR), Simulation and Software Technology Lilienthalplatz 7, DE–38108 Braunschweig, Germany ¶ German Aerospace Center (DLR), Space Operations and Astronaut Training Oberpfaffenhofen, DE–82234 Weßling, Germany ⋆ Corresponding author Abstract This paper gives an overview of the proposed GNC architecture for DLR’s Reusability Flight Experiment (ReFEx), which is split into two main subsystems: The Guidance and Control (G&C) subsystem, which determines the desired trajectory from the current flight state to a designated target and issues the neces- sary commands to the actuators (canards and rudder, as well as a reaction control system for flight phases outside the atmosphere) by calculating the necessary forces and torques based on the required changes of velocity and attitude for following this trajectory; the Hybrid Navigation System (HNS), which is respon- sible for estimating position, velocity, attitude, angular rates, and other parameters of the flight state.
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