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Staging and trajectory optimization of rockets during conceptual design

Koch, Aaron Dexter (2021) Staging and trajectory optimization of rockets during conceptual design. Dissertation, Universität Bremen.

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The conceptual design phase is critical because most of a launch vehicle's life cycle cost is determined during this phase. Therefore, the objective of this thesis is to facilitate the automated generation of rocket concepts. This is achieved by reducing the launch vehicle design problem to the optimization of staging and trajectory. The goal is to maximize the rocket's total payload ratio for a given payload mass and target orbit. The staging characteristics are optimized by extending the classical staging algorithm, which is based on the Tsiolkovsky rocket equation. The new algorithms take velocity losses and fairing separation into account. In addition, they are also applicable to configurations containing boosters and reusable stages. Trajectory optimization is facilitated by providing a trajectory approximation method that generates initial guesses and can also be used to estimate a rocket's payload capacity. A coupled optimization of staging and trajectory for models of Ariane 40 and Falcon Heavy resulted in increases of payload ratio by 12 and 34%, respectively. The methods developed in this work can be used to initialize a more detailed multidisciplinary design optimization.

Item URL in elib:https://elib.dlr.de/143997/
Document Type:Thesis (Dissertation)
Additional Information:Printed copies are available upon request
Title:Staging and trajectory optimization of rockets during conceptual design
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Koch, Aaron DexterUNSPECIFIEDhttps://orcid.org/0000-0002-1083-117XUNSPECIFIED
Journal or Publication Title:DLR-Forschungsbericht 2021-12
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:243
Keywords:Multi-stage rocket, Tsiolkovsky rocket equation, Optimal staging, Velocity losses, Trajectory optimization, Initial guess generation, Payload capacity, Multidisciplinary Analysis (MDA), Ariane 40, Falcon Heavy
Institution:Universität Bremen
Department:Fachbereich Produktionstechnik
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 - Systems Analysis Space Transport (SART)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Space Launcher Systems Analysis
Deposited By: Koch, Aaron
Deposited On:29 Sep 2021 12:08
Last Modified:18 May 2022 12:23

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