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Design of a Control Allocation Solution for the Winged Reusable Launch Vehicle ReFEx

Redondo Gutierrez, Jose Luis and Seelbinder, David and Robens, Johannes and Acquatella B., Paul (2022) Design of a Control Allocation Solution for the Winged Reusable Launch Vehicle ReFEx. In: AIAA Scitech 2022 Forum. AIAA SCITECH 2022 Forum, 3-7 Jan 2022, San Diego, USA. doi: 10.2514/6.2022-1842.

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Abstract

This paper presents a control allocation solution for the technology demonstrator mission ReFEx, which focuses on a vertical takeoff and horizontal landing strategy with autonomous navigation, online guidance, and controlled flight throughout the mission. The trajectory for the demonstration flight is aimed as one for a winged launch vehicle first stage: maintaining stability and control of the vehicle while reaching a predefined target. During the atmospheric phase the vehicle is stabilized by using an active aerodynamic control system which transforms inputs from the guidance and navigation systems into control commands for the individual actuators. In that sense, the control allocation subsystem translates commanded moments into commanded aerodynamic surface deflections. Due to the effect of modeling uncertainties, navigation errors, and underactuated regions, this subsystem needs to be robustified. The algorithm proposed in this paper addresses this challenge via a combination of the deflections required to trim the vehicle together with delta-deflections that aim at converging iteratively to the commanded moments. The combination of these two contributions is able to respond fast to state changes, compensate for modeling uncertainties and navigation errors, and provide a safe mode for the underactuated regions. The performance of the system is studied using a high-fidelity simulator.

Item URL in elib:https://elib.dlr.de/148374/
Document Type:Conference or Workshop Item (Speech)
Title:Design of a Control Allocation Solution for the Winged Reusable Launch Vehicle ReFEx
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Redondo Gutierrez, Jose LuisJose.RedondoGutierrez (at) dlr.dehttps://orcid.org/0000-0002-0037-2299
Seelbinder, DavidDavid.Seelbinder (at) dlr.deUNSPECIFIED
Robens, JohannesJohannes.Robens (at) dlr.deUNSPECIFIED
Acquatella B., PaulPaul.Acquatella (at) dlr.deUNSPECIFIED
Date:3 January 2022
Journal or Publication Title:AIAA Scitech 2022 Forum
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI:10.2514/6.2022-1842
Status:Published
Keywords:GNC, Control Allocation, Reentry vehicles
Event Title:AIAA SCITECH 2022 Forum
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:3-7 Jan 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Project ReFEx - Reusability Flight Experiment
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Navigation and Control Systems
Deposited By: Redondo Gutierrez, Jose Luis
Deposited On:20 Jan 2022 08:59
Last Modified:20 Jan 2022 08:59

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