28th Congress of the International Council of the Aeronautical Sciences, 23 - 28 September 2012, Brisbane, Australia
Paper ICAS 2012-5.10.1

NONLINEAR AERODYNAMIC MODELING OF UNSTABLE AIRCRAFT USING FLIGHT TEST DATA

R. Larsson, M. Enqvist*
Saab AB/Linköping Univ., Sweden; *Linköping Univ., Sweden

Keywords: aerodynamics, nonlinear, unstable, identification, flight test

This paper presents five direct identification methods for nonlinear aerodynamics of unstable aircraft applied to the JAS 39 Gripen fighter using flight test data. This type of identification is hard under the best of circumstances. Results are shown for both simulations and real flight test in the transonic envelop.

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