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UAM Vehicle Design with Emphasis on Electric Powertrain Architectures

Bertram, Oliver and Jäger, Florian and Voth, Viola and Rosenberg, Jan (2022) UAM Vehicle Design with Emphasis on Electric Powertrain Architectures. 2022 AIAA SciTech Forum, 03.-06. Jan. 2022, San Diego, California, USA and Virtual. doi: 10.2514/6.2022-1995.

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Abstract

The research on the system architecture of Urban Air Mobility (UAM) vehicles is a vital part within the DLR internal project HorizonUAM. One of the project goals in HorizonUAM is the development of a system concept for an air taxi. This includes research on safe and certifiable onboard systems. The aim of this article is to present results and findings with emphasis on electric powertrain architectures in the multirotor air taxi design. A preliminary design methodology was developed therefor, which enables the examination of full-electric, turbo-electric and hybrid-electric powertrains. This methodology was used in a design study to investigate the influence of different powertrain architectures on the multirotor design. Different evaluation parameters, parameter sweeps and technology exploration of batteries and fuel cell systems were applied to analyze and evaluate their impact on the UAM vehicle design. The main design drivers are the mass of the energy sources and the overall powertrain efficiency, which have a direct impact on the evaluation parameters like power and energy efficiency, maximum take-off mass, and payload fraction. The study showed that different powertrain architectures could lead to opposite vehicle design criteria. Therefore, a clear solution for an advantageous powertrain architecture could not be found. Hybrid-electric solutions, e.g. fuel cell and battery systems or parallel hybrid-electric systems, offer the possibility of increasing efficiency in different flight phases through suitable power management while increasing system complexity. The disadvantage of a high battery mass of a full-electric solution could thus be at least partially reduced.

Item URL in elib:https://elib.dlr.de/146611/
Document Type:Conference or Workshop Item (Speech)
Title:UAM Vehicle Design with Emphasis on Electric Powertrain Architectures
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bertram, OliverOliver.Bertram (at) dlr.dehttps://orcid.org/0000-0002-7732-9280
Jäger, FlorianFlorian.Jaeger (at) dlr.deUNSPECIFIED
Voth, ViolaViola.Voth (at) dlr.deUNSPECIFIED
Rosenberg, JanJan.Rosenberg (at) dlr.deUNSPECIFIED
Date:January 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.2514/6.2022-1995
Status:Published
Keywords:Urban Air Mobility, eVTOL, Powertrain, Fuel Cell, Battery
Event Title:2022 AIAA SciTech Forum
Event Location:San Diego, California, USA and Virtual
Event Type:international Conference
Event Dates:03.-06. Jan. 2022
Organizer:American Institute of Aeronautics and Astronautics (AIAA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Aircraft Systems
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Safety Critical Systems&Systems Engineering
Deposited By: Bertram, Oliver
Deposited On:31 Jan 2022 10:42
Last Modified:31 Jan 2022 10:42

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