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Individual Blade Control of a 5-bladed Rotor Using the Multiple Swashplate System

Küfmann, Philip and Bartels, Rainer and van der Wall, Berend G. and Schneider, Oliver and Holthusen, H. (2017) Individual Blade Control of a 5-bladed Rotor Using the Multiple Swashplate System. In: Proceedings of the 43rd European Rotorcraft Forum. 43rd European Rotorcraft Forum, 12.-15. Sep. 2017, Mailand, Italien.

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After its first wind tunnel test in 2015, the multiple swashplate system (META) as well as the DLR’s rotor test rig were modified and upgraded extensively to allow IBC operation on a five-bladed rotor system. In late 2016 a second wind tunnel test was performed on a Mach-scaled, five-bladed model rotor with the goal to reduce Vibration, noise and required rotor power on a five-bladed rotor in different flight conditions using proven IBC strategies. Highlights of the test matrix were 2/rev sweeps and the test of different localized pitch control (LPC) strategies for reduction of noise and required rotor power. In simulated high-speed flight, the required rotor power was successfully reduced using a 2/rev input with an amplitude of 1°. In descent flight condition, significant BVI noise reductions relative to the baseline case were achieved on both sides of the rotor disk through the application of 2/rev HHC as well as a localized pitch control (LPC) schedule. In addition the 5/rev hub vibration levels were reduced significantly both through the application of 3/rev IBC and a vibration controller using a 4-6/rev multi-harmonic IBC signal. The highest reduction was achieved for the vertical 5/rev force, nearby eliminating the most prominent component of rotor hub vibrations.

Item URL in elib:https://elib.dlr.de/114303/
Document Type:Conference or Workshop Item (Speech)
Title:Individual Blade Control of a 5-bladed Rotor Using the Multiple Swashplate System
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Küfmann, Philipft-hubhttps://orcid.org/0000-0003-0932-3247
Schneider, Oliveroliver.schneider (at) dlr.dehttps://orcid.org/0000-0002-0229-0756
Holthusen, H.dnwUNSPECIFIED
Date:15 September 2017
Journal or Publication Title:Proceedings of the 43rd European Rotorcraft Forum
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:IBC, HHC, Vibration control, noise reduction, helicopter
Event Title:43rd European Rotorcraft Forum
Event Location:Mailand, Italien
Event Type:international Conference
Event Dates:12.-15. Sep. 2017
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, L - The Quiet und Comfortable Rotorcraft
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: Küfmann, Philip
Deposited On:10 Oct 2017 14:48
Last Modified:10 Oct 2017 14:48

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