Aerodynamic Coefficients Models of Hypersonic Vehicle Based on Aero Database

The aerodynamic Coefficients models play an essential part in the simulation and the analysis of the hypersonic vehicle, especially in the trajectory planning. This paper builds the aerodynamic coefficients models by the nonlinear least square method based on the CAV aero database. The lift and drag coefficients models can be expressed with the polynomial and the exponential function. The parameters of the model have been gotten and the mean of relative error is less than 5.10%. So the models fit the aero characteristic well and can be used in practical design and simulation as a reference.