Identification of the Aerodynamic Coefficients of a Spin-Stabilized Projectile from Free Flight Data

Abstract

A general identification method of the aerodynamic coefficients of a spin-stabilized projectile which is based on the Modified Point Mass Trajectory Model (MPMTM) is proposed. The aim of this study is to avoid embedded sensors, which are complex and costly to implement. We consider a unique instrumentation device which is a Doppler RADAR. The method is developed directly taking into account the Doppler RADAR measurement data (radial velocity and angles) in order to override numerical differentiation and smoothing approximations. Finally an identification test using real Doppler RADAR data is given, showing the efficiency of the developed method.