Authors: V. Apostolyuk
Journal: AIAA Journal of Aircraft, 2007
Abstract: Modern advances in highly manoeuvrable and thrust-vectoring aircraft designs resulted in the need for highly sophisticated mathematical models of aircraft dynamics that are accurate and applicable within the wide range of incidence angles. Such a model could not be developed without corresponding lift- and drag-force representations that will be both accurate and relatively simple. At the same time, simple and accurate models of aircraft dynamics are highly necessary for flight control and navigation system research and development. Although conventional and currently widely used linear approximations of lift and drag coefficients deliver good results for the small incidence angle, they expectedly fail long before the incidence angle even reaches its stall value. Several harmonic approximations of lift and drag coefficients are compared and analysed in this Note. The best representation in terms of accuracy and simplicity is found and proposed, and the problem of its parameters estimation is solved.
Reference: V. Apostolyuk. Harmonic Representation of Aerodynamic Lift and Drag Coefficients // AIAA Journal of Aircraft, Vol. 44, No. 4, July-August 2007, pp. 1402-1404.
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