The mu-k method for robust flutter solutions
2004 (English)In: Journal of Aircraft, ISSN 0021-8669, E-ISSN 1533-3868, Vol. 41, no 5, 1209-1216 p.Article in journal (Refereed) Published
A straightforward frequency-domain method for robust flutter analysis is presented. First, a versatile uncertainty description for the unsteady aerodynamic forces is derived by assigning uncertainty to the frequency-domain pressure coefficients. The uncertainty description applies to any frequency-domain aerodynamic method, benefits from the same level of geometric detail as the underlying aerodynamic model, exploits the modal formulation of the flutter equation, and is computed by simple postprocessing of standard aerodynamic data. Next, structured singular value analysis is applied to derive an explicit criterion for robust flutter stability based on the flutter equation and a parametric uncertainty description. The resulting procedure for computation of a worst-case flutter boundary resembles a p-k or g-method flutter analysis, produces match-point flutter solutions and allows for detailed aerodynamic uncertainty descriptions. Finally, the proposed method is successfully applied to a wind-tunnel model in low-speed airflow.
Place, publisher, year, edition, pages
2004. Vol. 41, no 5, 1209-1216 p.
Doublet-Lattice Method, External Stores, Flight Data, Uncertainty, Margins, Design
IdentifiersURN: urn:nbn:se:kth:diva-23804DOI: 10.2514/1.3062ISI: 000224472600027ScopusID: 2-s2.0-7544234974OAI: oai:DiVA.org:kth-23804DiVA: diva2:342503
QC 20100525 QC 201109232010-08-102010-08-102014-12-09Bibliographically approved