doi: 10.3850/S2010428611000183

Updating Computational Aeroelastic Models using Flight Flutter Test Data

S. Timme^a and K. J. Badcock^b School of Engineering, University of Liverpool Liverpool, England L63 3GH, United Kingdom. ^aSebastian.Timme@liverpool.ac.uk ^bK.J.Badcock@liverpool.ac.uk

ABSTRACT

A method is explored to identify a correction for the system matrices of a computational aeroelastic model based on information from flight test data. The correction matrices are identified using the Nissim and Gilyard method adapted in this work to exploit the predictive capabilities of numerical aeroelastic tools while correcting for missing physics and systematic modelling errors. The simplified aerodynamics in the original Nissim and Gilyard method are discarded using computational fluid dynamics to evaluate the aero- dynamic influence in the fluid/structure coupled system. Results are presented for the aeroelastic Goland wing/store and multidisciplinary optimisation wing configurations.

Keywords: Aeroelasticity, Computational fluid dynamics, Flutter, Model updating, System identification.

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