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Whirl-Flutter Suppression in Advanced Turboprops and Propfans by Active Control Techniques - Part II.

Nitzsche, F. (1) (1991) Whirl-Flutter Suppression in Advanced Turboprops and Propfans by Active Control Techniques - Part II. International Forum on Aeroelasticity and Structural Dynamics 1991 Combined with a One-Day Workshop on Smart Material Systems and Structures, June 3-6, 1991, Eurogress Center Aachen..

Full text not available from this repository.

Abstract

The feasibility of using the active control technique to suppress the whirl-flutter instability of advanced turboprops is further investigated. Aerodynamic vanes are incorporated at the engine nacelles to generate control airloads. The actuator system is driven by a control law which is based on the Kalman filter estimation of the critical aeroelastic modes of the structure. The results demonstrate that the compensator provides enough controllability to prevent the whirl-flutter onset well beyond the design speed. The present study suggests that a very efficient vibration isolation in advanced turboprops may be achieved by both optimizing the engine-propeller suspension in the actual flying envelope, and employing the active control technique to deal with the safe margins required by the present aircraft certification regulations.

Item URL in elib:https://elib.dlr.de/39547/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1992,
Title:Whirl-Flutter Suppression in Advanced Turboprops and Propfans by Active Control Techniques - Part II.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nitzsche, F. (1)UNSPECIFIEDUNSPECIFIED
Date:1991
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:91-122
Page Range:pp. 505-512
Series Name:DGLR-Bericht 91-06
Status:Published
Keywords:Whirl-flutter, active control, advanced turboroprop, propeller vibration.
Event Title:International Forum on Aeroelasticity and Structural Dynamics 1991 Combined with a One-Day Workshop on Smart Material Systems and Structures, June 3-6, 1991, Eurogress Center Aachen.
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:46

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