样条函数在估算飞机气动参数中的应用

根据气动参数估算的需要，分析了样条函数的基本概念，方程及三次插值样条函数在参数估算中的应用，以某歼击机全机平衡升力线斜率对马赫数的偏导数为例，用三次插值样条函数对其进行了估算。

Application of Spline Function toEstimating Aerodynamic Derivative

Abstract The estimation of the aerodynamic derivative is a important job in the research of flying performances and qualities. This paper presents a new method-----spline function method to estimating aerodynamic derivative. At first , the paper shows principle of spline function, then applies cubic spline interpolation to estimating aerodynamic derivative and creating a database software package. The conclusion is that the spline function method is an effective mathematical method of estimating continuous and accurate aerodynamic derivative. And it also presents the shortcomings of least square fit method.