Estimation of aerodynamic derivatives of projectiles from aeroballistic range data using maximum likelihood method

摘要

This paper describes the application of the maximum likelihood method to estimate the aerodynamic derivatives of (i) the AGARD standard ballistic model HB-2 from supersonic free13; flight data available in literature, and (ii) ballistic mode simulated data of a surface-to-air missile.13; For the AGARD dam, two types of dynamic models have been used: (i) body axis coordinate13; system model, and (ii) hybrid type of formulation. wherein the aerodynamic forces are in wind axis13; arid the aerodynamic moments are represented in body axis coordinate system. For surface-to-air13; missile data the equations of motion are solved in fin-body axis system. The results of this analysis13; denonstrate the suitability and function adequacy of the mathematical models used, the13; consistency of data arid power of the parameter estimation methodology in generating13; aerodynamic derivatives from realistic free flight trajectories.