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

Nitzsche, F. (1994) Whirl-Flutter Suppression in Advanced Turboprops and Propfans by Active Control Techniques. Journal of Aircraft, May/June 1994., No. 3, pp. 713-719.

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/39688/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=1994,
Title:Whirl-Flutter Suppression in Advanced Turboprops and Propfans by Active Control Techniques.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nitzsche, F.UNSPECIFIEDUNSPECIFIED
Date:1994
Journal or Publication Title:Journal of Aircraft, May/June 1994.
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:No. 3
Page Range:pp. 713-719
Series Name:Vol. 31
Status:Published
Keywords:Whirl-flutter, active control, advanced turboprop, propeller vibration.
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 10:51

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