天文动力学方程数值积分中的一种有效变步法

An Efficient Step-size Control Method in Numerical Integration for Astrodynamical Equations

利用积分曲线的曲率控制步长的技巧,使天文动力学方程数值解法的精度和速度有较大提高.这种方法适用于天体精密定轨以及一些精度要求高的常微分方程初值问题的数值积分.

Using the curvature of the integral curve, a step-size control method is introduced. This method will prove to be the efficient scheme in the sense that it saves computation time and improve accuracy of numerical integration for astrodynamical egua-tions.