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Identification of the Dynamic Properties of Active Twist Rotor Model Blade Using Output-Only Data

Coppotelli, G. and Vetrano , F. and Nitzsche, F. and Feszty, D. and Mander , A. and Wierach, Peter and Riemenschneider, Johannes (2009) Identification of the Dynamic Properties of Active Twist Rotor Model Blade Using Output-Only Data. IOMAC 2009, 4. - 6. Mai 2009, Porto Novo, Ancona, Italy.

Full text not available from this repository.

Abstract

n this paper, an approach to estimate the dynamic characteristics of a rotating blade using response data is proposed. A test campaign devoted to demonstrate the capability of the Smart Spring device to alter the dynamic properties of the rotating blade is carried out in the framework of the Smart Hybrid Active Rotor Control System, SHARCS, project. Within this project, the key factor is an active vibration control concept that uses piezoceramic actuators to preferentially vary dry friction and stiffness of a structure. This device, if located at the blade root, could adaptively vary the dynamic stiffness of the blade to change its flexural characteristics, thus allowing control of the aeroelastic response of the entire blade. In this paper it is shown how the modal parameters will be estimated from the time histories recorded, by a distributed array of sensors, at different rotational speed of the blade and for different values of the stiffness of the Smart Spring device. Both time domain and frequency domain methods were applied in order to quantify the effects on the modal properties of different operating conditions of a prototype version of the Smart Spring device. This device was attached to the push rod of an Active Twist Rotor blade developed at the German Aerospace Center (DLR). From the performed experimental investigation, carried out at the DLR’s whirl tower test facility, it was possible first to draw the typical fan plots of the rotating blade, from which useful information about the dynamic behavior of the system could be achieved. Then, a validation of the numerical model of the smart spring device was obtained.

Item URL in elib:https://elib.dlr.de/59936/
Document Type:Conference or Workshop Item (Speech)
Title:Identification of the Dynamic Properties of Active Twist Rotor Model Blade Using Output-Only Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Coppotelli, G.Department of Aerospace Engineering and Astronautics, Universit`a di Roma “La Sapienza”UNSPECIFIED
Vetrano , F.Department of Aerospace Engineering and Astronautics, Universit`a di Roma “La Sapienza”UNSPECIFIED
Nitzsche, F.Department of Mechanical and Aerospace Engineering Carleton University, Ottawa, Ontario, CanadaUNSPECIFIED
Feszty, D.Department of Mechanical and Aerospace Engineering Carleton University, Ottawa, Ontario, CanadaUNSPECIFIED
Mander , A.Department of Mechanical and Aerospace Engineering Carleton University, Ottawa, Ontario, CanadaUNSPECIFIED
Wierach, PeterUNSPECIFIEDUNSPECIFIED
Riemenschneider, JohannesUNSPECIFIEDUNSPECIFIED
Date:May 2009
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Keywords:Active Twist, Rotor blade, modal analysis
Event Title:IOMAC 2009
Event Location:Porto Novo, Ancona, Italy
Event Type:Conference
Event Dates:4. - 6. Mai 2009
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 Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Ries, Doris
Deposited On:16 Sep 2009 10:33
Last Modified:03 Mar 2010 09:49

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