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R. Koenig, M. Foell, E. Stumpf
Various configurations of electric aerial vehicles (e.g. electric vertical takeoff and landing systems - eVTOLs) for use cases like transportation of people and goods are currently being developed. These systems are based on distributed electric propulsion and thus have multiple rotors across the aircraft. However, these create loud and annoying noise, which is mainly caused by the rotors. This leads to problems regarding acceptance and obstructs market success. A framework for systematic acoustic optimization of electric aerial vehicles at early development stages is proposed in this paper. A classification of system levels of electric propulsion systems is developed. It focuses on rotor configurations and is detailed with characteristics of emerging electric aerial vehicles. Four system levels are identified. Based on that, a survey on noise reduction approaches for each system level is done. The survey is complemented with approaches from other domains like general aviation, helicopters and cars. Merging classification with survey, enables to rate characteristics of the identified system levels regarding acoustics and uncovers open research topics.
Deutscher Luft- und Raumfahrtkongress 2020
Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2020
21,0 x 29,7 cm, 13 Seiten
Stichworte zum Inhalt:
Rotor Acoustics, Noise Reduction Technologies, Psychoacoustics, Distributed Electric Propulsion
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Koenig, R. ; Foell, M.; Stumpf, E. (2020): Potentials for Acoustic Optimization of Electric Aerial Vehicles . Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.. (Text). https://doi.org/10.25967/530123. urn:nbn:de:101:1-2020091413210042764801.