快速确定扰动引力的广域多项式逼近方法的模拟实验

飞行器在飞行过程中时刻受到地球重力场的作用,地球外部空间扰动引力会对飞行器的运行轨迹和姿态等方面产生影响,因此,研究地球重力场信息并实时快速的计算出飞行器运行处的扰动引力,对飞行器轨迹和姿态等方面的调节具有重要的作用。利用模拟数据,本文基于广域多项式逼近方法来快速逼近扰动引力,该法在单元边界点上满足插值条件,而又利用插值单元周围节点信息,实现拟合过程。试验表明,这一方法在高度方向的步长为30km的条件下可达到1mgal的计算精度。

Simulation experiment of quickly determination of disturbing gravity using wide-area polynomial approximation

Aerocraft is influenced by the gravity field of the earth when it is used in the course of the flight.The disturbing gravity of the exterior earth can influence the track and gesture of the aerocraft.So,researching the gravity field of the earth and quickly calculating the disturbing gravity have the important effect on the adjusting of the track and gesture of the aerocraft.Using the simulated data,a wide-area polynomial approximation method was used to approximate the disturbing gravity.This method can sa...