扰动引力计算及其对导弹精度影响研究  

The Calculation of Disturbing Gravitation and the Research of Its Effect on Missile Accuracy

作　　者：袁宇[1] 王明海[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《弹箭与制导学报》2006年第S6期360-362,366,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：通过比较几种现有的扰动引力计算方法的特点,采用了球谐函数法计算扰动引力,给出了用几何关系法求落点偏差的方法,分析了扰动引力在导弹飞行过程中的变化趋势和球谐函数模型取不同阶数时扰动引力计算造成的落点偏差,实现了通过合理选取球谐函数阶数来保证扰动引力截断误差较小的快速计算。The characters of several current calculation methods of disturbing gravitation are compared and the spherical harmonics function to calculate the disturbing gravitation is adopted. The geometric relation method in calculating impact point deviation is presented. The fluctuant trend of the disturbing gravitation during missile's flying process and its impact point deviation caused by disturbing gravitation while selecting different levels is analyzed. A fast algorithm by selecting a proper spherical harmonics function level to ensure the less interceptive error is realized.

关 键 词：扰动引力 球谐函数 落点偏差 

分 类 号：TJ760[兵器科学与技术—武器系统与运用工程]