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Robust Aeroelastic Analysis in the Laplace Domain: The μ-p Method
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Flight Dynamics.
2007 (English)In: IFASD 2007: International Forum on Aeroelasticity and Structural Dynamics, 2007Conference paper, Published paper (Other academic)
Abstract [en]

In this work the so-called μ-k method for robust flutter analysis is generalized to theLaplace domain. Although the generalization as such is a straightforward matter, the resultingμ-p method is far more versatile than the previous formulation. With the new method, a singlestructured singular value (or μ) evaluation can be used to determine if a certain eigenvalue p is asolution to the uncertain flutter equation or not. This result makes it possible to compute regionsof feasible eigenvalues in the complex plane, as well as extreme eigenvalues that can be used topredict damping bounds and perform robust flutter analysis. The capability to predict dampingbounds at any flight condition is a very attractive feature of the μ-p method, as flight testing israrely taken to the flutter point. This feature also makes it possible to estimate the magnitude ofthe uncertainty based on the measured frequency and/or damping of a particular mode, whichcan reduce the potential conservativeness of the robust analysis. Finally, the capabilities of thenew method is demonstrated by applying it to a low-speed wind tunnel model.

Place, publisher, year, edition, pages
2007.
Keyword [en]
Robust Flutter Analysis, Laplace Domain, Model Validation, Flight Testing
National Category
Aerospace Engineering
Identifiers
URN: urn:nbn:se:kth:diva-77677OAI: oai:DiVA.org:kth-77677DiVA: diva2:491937
Conference
International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2007. Stockholm, Sweden. 18-20 June, 2007
Note
QC 20120522Available from: 2012-02-07 Created: 2012-02-07 Last updated: 2012-05-22Bibliographically approved

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