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The Vertical Landing Vehicles Library (VLVLib): a Modelica-based approach to high-fidelity simulation and verification of GNC systems for reusable rockets

Fari, Stefano (2022) The Vertical Landing Vehicles Library (VLVLib): a Modelica-based approach to high-fidelity simulation and verification of GNC systems for reusable rockets. In: Proceedings of the International Astronautical Congress, IAC. 73rd International Astronautical Congress (IAC), 18-22 Sep 2022, Paris, France. ISSN 0074-1795.

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Abstract

Vertical Landing (VL) Reusable Launch Vehicles (RLVs) must rely on performing and robust Guidance, Navigation and Control (GNC) algorithms, that are normally tested and verified in closed-loop high-fidelity simulators. This paper introduces the Vertical Landing Vehicles Library (VLVLib), a new Modelica-based tool for the advanced physical modeling and simulation of VL RLV dynamics. Modelica, an acausal open-source object-oriented modeling language, is exploited to produce a multibody vehicle model where multiple effects can be easily added, modified or switched in complexity. At the same time, it offers a modular modeling methodology to quickly adapt to vehicle changes or potential new features during the development process, with benefits in terms of project speed and costs. The way Modelica features are exploited is detailed throughout the paper. At its current development status, the library is able to account for, in more detail, four main effects relevant for the GNC robustness tests: (1) propellant slosh dynamics; (2) Thrust Vector Control (TVC) dynamics;(3) landing legs deployment disturbances; (4) touchdown dynamics. They are modeled and integrated so to allow an easy generation of a vehicle model that holds a prescribed fidelity level for each sub-system, and can be compiled and exported and harmoniously integrate other simulation environments (e.g. Simulink). The potential of VLVLib is demonstrated with representative examples as applied to CALLISTO reusable rocket demonstrative mission.

Item URL in elib:https://elib.dlr.de/188514/
Document Type:Conference or Workshop Item (Speech)
Title:The Vertical Landing Vehicles Library (VLVLib): a Modelica-based approach to high-fidelity simulation and verification of GNC systems for reusable rockets
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Fari, StefanoUNSPECIFIEDhttps://orcid.org/0000-0001-5595-6905UNSPECIFIED
Date:18 September 2022
Journal or Publication Title:Proceedings of the International Astronautical Congress, IAC
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
ISSN:0074-1795
Status:Published
Keywords:Advanced modeling, Modelica, Simulation, Reusable Launch Vehicles, GNC, Verification
Event Title:73rd International Astronautical Congress (IAC)
Event Location:Paris, France
Event Type:international Conference
Event Dates:18-22 Sep 2022
Organizer:International Astronautical Federation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Navigation and Control Systems
Deposited By: Fari, Stefano
Deposited On:28 Sep 2022 12:49
Last Modified:11 Sep 2023 12:17

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