<div class="csl-bib-body">
<div class="csl-entry">Amri, H., Feil, R., Hajek, M., & Weigand, M. (2016). Possibilities and difficulties for rotorcraft using variable transmission drive trains. <i>CEAS Aeronautical Journal</i>. https://doi.org/10.1007/s13272-016-0191-6</div>
</div>
The final publication is available at Springer via <a href="https://doi.org/10.1007/s13272-016-0191-6" target="_blank">https://doi.org/10.1007/s13272-016-0191-6</a>.
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dc.description.abstract
This publication shows advantages and possible applications for variable transmission drivetrains within rotorcraft. The power requirement of a generic helicopter with constant and variable rotor speed was calculated. Various drive train technologies that support a variable transmission were described. The prospects of this technology, its influence on the dynamic behaviour of a rotor and further areas that need to be investigated extensively are presented. This technology is applicable to some rotorcraft architecture. Requests from the rotorcraft industry underline the necessity for future rotorcraft using variable rotational speeds. However, the A160 or the EC145 and Mi-8 already show the potential of this technique. Reduction of required power of the rotor should be possible and also an extension of the flight envelope towards higher flight speeds, higher altitudes, better manoeuvrability, etc. By using a variable transmission gearbox, turbine and auxiliary units can still be driven at their design point, independent of the current rotor speed. Excessive loads may occur when discrete speed transmission are used. Frictional or fluid transmissions with continuous variable ratio may fail due to overheating. Other continuous concepts are favoured. The design of a variable speed rotor focuses specifically on its dynamic behaviours and on structural and geometrical optimisation to avoid operation at rotational speed resonance frequencies. Morphing structures may support this. Some rotorcraft architectures can benefit from a variable speed rotor technology. It probably will increase efficiency, decrease noise levels, fuel consumption and CO2 production, and the flight envelope may be extended.
en
dc.language
English
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dc.language.iso
en
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dc.publisher
Springer
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dc.relation.ispartof
CEAS Aeronautical Journal
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dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
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dc.subject
Variable speed rotor
en
dc.subject
Variable transmission drivetrain
en
dc.subject
Power optimisation
en
dc.subject
Economic rotor craft
en
dc.subject
Flight envelope extension
en
dc.subject
Future technology
en
dc.title
Possibilities and difficulties for rotorcraft using variable transmission drive trains
en
dc.type
Article
en
dc.type
Artikel
de
dc.rights.license
Creative Commons Namensnennung 4.0 International
de
dc.rights.license
Creative Commons Attribution 4.0 International
en
dc.contributor.affiliation
Technical University of Munich-HT
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dc.contributor.affiliation
Technical University of Munich-HT
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dc.rights.holder
The Author(s) 2016
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dc.type.category
Original Research Article
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tuw.journal.peerreviewed
true
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tuw.peerreviewed
true
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tuw.version
vor
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dcterms.isPartOf.title
CEAS Aeronautical Journal
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tuw.publication.orgunit
E307 - Institut für Konstruktionswissenschaften und Technische Logistik
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tuw.publisher.doi
10.1007/s13272-016-0191-6
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dc.date.onlinefirst
2016-03-31
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dc.identifier.eissn
1869-5590
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dc.identifier.libraryid
AC11360103
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dc.identifier.urn
urn:nbn:at:at-ubtuw:3-1689
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dc.rights.identifier
CC BY 4.0
de
dc.rights.identifier
CC BY 4.0
en
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
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http://purl.org/coar/resource_type/c_18cf
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item.grantfulltext
open
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item.languageiso639-1
en
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item.fulltext
with Fulltext
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item.openaccessfulltext
Open Access
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item.openairetype
Article
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item.openairetype
Artikel
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item.cerifentitytype
Publications
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item.cerifentitytype
Publications
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crisitem.author.dept
E307-02 - Forschungsbereich Maschinenelemente und Luftfahrtgetriebe
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crisitem.author.dept
Technical University of Munich-HT
-
crisitem.author.dept
E307-02 - Forschungsbereich Maschinenelemente und Luftfahrtgetriebe
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crisitem.author.orcid
0000-0002-8914-7329
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crisitem.author.parentorg
E307 - Institut für Konstruktionswissenschaften und Produktentwicklung
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crisitem.author.parentorg
E307 - Institut für Konstruktionswissenschaften und Produktentwicklung