为解决扰动引力快速计算的时效性和精确性问题,在点质量模型基础上,根据扰动引力矢量随空间位置的变化规律,提出了三次样条函数对扰动引力空间变化规律进行数值逼近,分别对点质量模型的四个频段空间采样点扰动引力进行样条函数插值仿真,降低了计算复杂度,解决了由于数据计算引起的延时误差问题。结果表明:该方法实现了弹载计算机快速计算,并具有良好的计算精度。

In order to implement fast and real time computation of disturbing gravity trajectory, after the analysis of each frequency space disturbing gravity vector results based on the point mass model, a cubic spline method was presented for the offset approximation according to the four frequency space disturbing gravity, the computing structure become simple; the delay error caused by the program of onboard computer was avoided. The results show that the computing structure is simple; the disturbing gravity trajectory of a missile can be calculated fast and accurately.