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The second Wind-tunnel test of DLR's multiple swashplate system

Küfmann, Philip and Bartels, Rainer and van der Wall, Berend G. and Schneider, Oliver and Holthusen, Hermann and Postma, Jos (2019) The second Wind-tunnel test of DLR's multiple swashplate system. CEAS Aeronautical Journal, 10 (2), pp. 385-402. Springer. doi: 10.1007/s13272-018-0323-2. ISSN 1869-5590.

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Official URL: https://link.springer.com/article/10.1007/s13272-018-0323-2


After proving its individual blade control (IBC) capabilities on a four-bladed rotor system in the wind tunnel, the DLR’s multiple swashplate system and its control software were developed further to allow IBC operation on a five-bladed rotor system. After preliminary tests in hover conditions, a second wind-tunnel test was performed in the DNW-LLF wind tunnel in late 2016. The goal of this test on a Mach-scaled model rotor was to reduce vibration, noise, and required rotor power in different flight conditions using proven IBC strategies as well as localized pitch control (LPC) on five blades. In descent flight condition, significant reductions of blade–vortex interaction noise relative to the baseline case were achieved on both sides of the rotor disk through the application of 2/rev higher harmonic control as well as using an LPC schedule. Through the application of 3/rev IBC as well as a vibration controller using a 4–6/rev multi-harmonic IBC Signal, 5/rev hub loads were reduced significantly and the 5/rev vertical vibrations were nearly eliminated. In addition, during simulated high-speed-level flight with a wind speed of 76 m/s, the required rotor power was successfully reduced using a 2/rev input with an amplitude of 1°.

Item URL in elib:https://elib.dlr.de/123494/
Document Type:Article
Title:The second Wind-tunnel test of DLR's multiple swashplate system
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Küfmann, PhilipUNSPECIFIEDhttps://orcid.org/0000-0003-0932-3247UNSPECIFIED
Bartels, RainerUNSPECIFIEDhttps://orcid.org/0009-0001-0498-6247UNSPECIFIED
van der Wall, Berend G.UNSPECIFIEDhttps://orcid.org/0000-0001-6144-0921UNSPECIFIED
Schneider, OliverUNSPECIFIEDhttps://orcid.org/0000-0002-0229-0756UNSPECIFIED
Holthusen, HermannDNW, NetherlandsUNSPECIFIEDUNSPECIFIED
Date:24 June 2019
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 385-402
Keywords:Multiple swashplate system, IBC, LPC, noise and vibration reduction, performance enhancement, wind-tunnel test
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
German-Dutch Windtunnels
Deposited By: Bartels, Rainer
Deposited On:21 Nov 2018 10:09
Last Modified:21 Nov 2023 07:03

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