The inverse problem of external ballistics for identifi cation of aerodynamic coeffi cients of a spin-stabilized projectile within the modifi ed point-mass trajectory model

Abstract

The aim of this paper is to develop a technique for the identifi cation of the projectile aerodynamic coefficients using the free-fl ight-test measurements. An algebraic method for solving the inverse problem of external ballistics is proposed. As the initial mathematical model of the projectile fl ight, a simplifi ed version of the modifi ed point-mass trajectory model in explicit form is used. For all aerodynamic coefficients of the model, exact explicit analytic expressions for their dependence on the experimentally measurable trajectory parameters are derived. Importantly, within the proposed approach, the solution to the inverse problem is unique.