Aerodynamic coefficients identification procedure of a finned projectile using magnetometers and videos free flight data
Résumé
This paper presents a new procedure for the identification of the aerodynamic coefficients of vehicles in flight. This approach is based on system identification techniques and by use of free flight data obtained by means of measurement techniques like magnetometers and high speed videos. Several steps are required, like the polynomial description of the aerodynamic coefficients as a function of Mach number and angle of attack, identifiability analysis followed by the estimation of the model parameters. Based on experimental free flight measurements of the Basic Finner reference projectile, these estimation results are then compared to existing ones in literature. Moreover, the estimation precision is improved by taking into account the parameter estimation problem through a multiple fit strategy.