顾及自身遮挡影响的卫星非保守力作用面积的算法研究  

RESEARCH ON AREA CALCULATION OF NON-CONSERVATIVE FORCE ACTING ON SATELLITE SURFACE WITH CONSIDERATION OF SELF-SHIELDING EFFECT

作　　者：陈润静[1,2,3] 彭碧波[1,2] 范城城[1,2,3] 高凡[1,2,3] 

机构地区：[1]中国科学院测量与地球物理研究所,武汉430077 [2]大地测量与地球动力学国家重点实验室,武汉430077 [3]中国科学院研究生院,北京100049

出　　处：《大地测量与地球动力学》2012年第6期94-98,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金重点项目(41131067);国家自然科学基金(40774012)

摘　　要：卫星所受的各种非保守力是与卫星外表面形状与面积密切相关的。受卫星自身遮挡的影响,非保守力的作用面积可能小于卫星表面物理面积。对此,提出了一种顾及自身遮挡影响的卫星非保守力作用面积的算法,其原理是先将复杂的卫星体分解成几种简单的基本几何形状的组合体,再将各组成部分划分成若干个微分面元,构建有效的判别式依次判断各微分面是否受到卫星其他各组成体的遮挡,累积未受遮挡的微分面元即可得出受力面积。将此方法应用于GRACE卫星的太阳直接辐射压力的计算,结果表明该算法可有效并精确计算受力面积。All types of non-conservative forces acting space missions are closely related with their configrations. Due to the impact of the self-shielding effect, surface area which is suffered from external forces may be smaller than the actual surface area. This paper puts forward a reliable and effective algorithm. This method models the complex spacecraft configurations as a combination of several basic geometric shapes which are then divided into several differential surface areas. Each element is checked individually by corresponding condition on its shielding status, and the overall areas are determined by summing the exposed elements. It is indicated that the algorithm is effective in computation of the precise stress areas when Implemented in the calculation of solar radiation pressure force acting on GRACE mission, while traditional method manifests its limit in precision due to the neglect of self- shielding effect.

关 键 词：自身遮挡 卫星体分解 微分面划分 遮挡判断条件 受力面积累积 

分 类 号：P227[天文地球—大地测量学与测量工程]