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Design and Evaluation of an Attitude Control System for a Spacecraft Landing Demonstrator

Schütz, Moritz (2024) Design and Evaluation of an Attitude Control System for a Spacecraft Landing Demonstrator. Bachelor's, Karlsruher Institut für Technologie.

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Abstract

As a replacement for toxic hydrazine-based spacecraft propulsion the German Aerospace Center is developing the green propellant combination HyNOx and accompanying thrusters. In order to demonstrate this technology and test novel control strategies a lander demonstrator called "The LÄNDer" is being built. This work presents a model predictive attitude controller that can control the current lander demonstrator hardware, and is capable of being adapted for usage in the planned free-flight demonstrator. The specifics of the attitude control actuators used in the lander demonstrator necessitate its treatment as a set-valued input system. In addition, external forces encountered during atmospheric descent are assumed to be nonlinear and time-varying. It approaches the choice of set-valued inputs as a problem of combinatorial optimization, employing modified path planning algorithms in combination with a nonlinear system model to determine the control action. The impact of several controller parameters is evaluated with Monte Carlo experiments, which were also used for examinations regarding robustness and stability. After evaluation in a simulation environment, the controller is then deployed to the embedded avionics of the lander demonstrator hardware.

Item URL in elib:https://elib.dlr.de/202317/
Document Type:Thesis (Bachelor's)
Title:Design and Evaluation of an Attitude Control System for a Spacecraft Landing Demonstrator
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schütz, MoritzUNSPECIFIEDhttps://orcid.org/0009-0007-5990-3799151994797
Date:2024
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:63
Status:Published
Keywords:Guidance, Navigation & Control Attitude Control Model Predictive Control Spacecraft Landers Green Propulsion
Institution:Karlsruher Institut für Technologie
Department:Fakultät für Elektrotechnik und Informationstechnik, Institut für Regelungs und Steuerungssysteme (IRS)
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 - Agile development of advanced rocket propulsion systems
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Spacecraft and Orbital Propulsion
Deposited By: Böhringer, Isabell
Deposited On:31 Jan 2024 07:16
Last Modified:31 Jan 2024 07:16

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