RESEARCH ON AREA CALCULATION OF NON-CONSERVATIVE FORCE ACTING ON SATELLITE SURFACE WITH CONSIDERATION OF SELF-SHIELDING EFFECT
Chen Runjing 1,2,3) ;Peng Bibo 1,2) ;Fan Chengcheng 1,2,3) ; and Gao Fan 1,2,3)
1)Institute of Geodesy and Geophysics,Chinese Academy of Science ,Wuhan 430077;2)State Key Laboratory of Geodesy and Earth’s Dynamics, Wuhan 430077;3)Graduate University of Chinese Academy of Sciences, Beijing 100049
Abstract：All types of nonconservative forces acting space missions are closely related with their configrations. Due to the impact of the selfshielding 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 selfshielding effect.
Chen Runjing,Peng Bibo,Fan Chengcheng et al. RESEARCH ON AREA CALCULATION OF NON-CONSERVATIVE FORCE ACTING ON SATELLITE SURFACE WITH CONSIDERATION OF SELF-SHIELDING EFFECT[J]. jgg, 2012, 32(6): 94-98.
