Fully Structured Aerodynamic Model for Parameter Identification of a Reentry Experimental Vehicle

摘要

Vehicle preflight aerodynamic databases are frequently validated and improved using system identificationntechniques that require the availability of flight data and the definition of suitable aerodynamic models. In thisnframework, the paper presents a novel theoretical aerodynamicmodel to be used for the aerodynamic identificationnof a lifting body in subsonic, transonic, and supersonic regimes. The proposed model is based on the generalnproperties of the continuity equation in the von Kármán form. Each aerodynamic coefficient incorporates freenparameters to be estimated fromthe flight data analysis and takes into account the simultaneous effects of the severalnvehicle state variables. The proposed model was applied to the identification from the flight data of an experimentalnvehicle of the Italian Aerospace Research Centre. Identification results show that the model is able to perform annexcellent fitting of the aerodynamic coefficients experimented in flight by the vehicle.