AERODYNAMIC COEFFICIENT RECONSTRUCTION OF A CONTROLLED SPIN STABILIZED PROJECTILE USING MONO AND MULTI FIDELITY SURROGATE MODELS

摘要

The trajectory of a 155 spin-stabilized controlled projectile is reproduced using surrogate models. RANS evaluations of a spoiler aerodynamic coefficients constitute a kriging database. The mono-fidelity surrogate model is unable to reproduce the evolution of the aerodynamic coefficients. A second level of fidelity is constituted of wind tunnel measurements in the definition of a cokriging model. The measurement points are chosen using an exchange algorithm over the available data. The inclusion of three experimental data points in the cokriging database improves greatly the accuracy of the coefficients estimations, leading to the quasi reproduction of the trajectory.