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Conditional Averaging Methodology for Periodic Data with Time Jitter and Spatial Scatter

van der Wall, Berend G. and Schneider, Oliver (2007) Conditional Averaging Methodology for Periodic Data with Time Jitter and Spatial Scatter. 33rd European Rotorcraft Forum, 2007-09-11 - 2007-09-13, Kazan, Russia.

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In helicopter rotor experimental data - either originating from the flying helicopter or from the wind tunnel model -– periodic and non-periodic motions of the test vehicle are present due to gusts and transient motion of the helicopter or due to flexibility of model support and unsteadiness in the wind tunnel environment. These motions usually are of low-frequency nature compared to the rotor rotational frequency, but they slightly change the aerodynamic environment revolution by revolution. Consequently the data like rotor blade position, blade pressure, vortex position, microphone pressure exhibit disturbances in space and/or time that must properly be addressed in data analysis, especially when the time (or space) averaged data are to be computed. These averaged data (velocity fields, position or pressure time histories) are the basis for code validation efforts and thus special algorithms must be applied to eliminate these spatial scatter and/or time jitter effects appropriately.

Item URL in elib:https://elib.dlr.de/48105/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Conditional Averaging Methodology for Periodic Data with Time Jitter and Spatial Scatter
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:12 September 2007
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-18
Keywords:average, conditional average, time jitter, spatial scatter
Event Title:33rd European Rotorcraft Forum
Event Location:Kazan, Russia
Event Type:international Conference
Event Dates:2007-09-11 - 2007-09-13
Organizer:Kazan Helicopters
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Active Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:10 Dec 2007
Last Modified:27 Apr 2009 13:42

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