Sensitivity analysis for a type of statically stable sailcrafts  

作　　者：Zheng-Xue Li Jun-Feng Li He-Xi Baoyin 

机构地区：[1]School of Aerospace,Tsinghua University,100084 Beijing,China

出　　处：《Acta Mechanica Sinica》2012年第2期532-542,共11页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (10832004);China Postdoctoral Science Foundation (023200006)

摘　　要：Two types of sensitivities are proposed for stat- ically stable sailcrafts. One type is the sensitivities of solar-radiation-pressure force with respect to position of the center of mass, and the other type is the sensitivities of solar-radiation-pressure force with respect to attitude. The two types of sensitivities represent how the solar-radiation- pressure force changes with the position of mass center and the attitude. Sailcrafts with larger sensitivities undergo larger error of the solar-radiation-pressure force, leading to larger orbit error, as demonstrated by simulation. Then as a case study, detailed formulas are derived to calculate the sensi- tivities for sailcrafts with four triangular sails. According to these formulas, in order to reduce both types of sensitivities, the angle between opposed sails should not be too large, and the center of mass should be as close to the axis of symmetry of the four sails as possible and as far away from the center of pressure of the sailcraft as possible.Two types of sensitivities are proposed for stat- ically stable sailcrafts. One type is the sensitivities of solar-radiation-pressure force with respect to position of the center of mass, and the other type is the sensitivities of solar-radiation-pressure force with respect to attitude. The two types of sensitivities represent how the solar-radiation- pressure force changes with the position of mass center and the attitude. Sailcrafts with larger sensitivities undergo larger error of the solar-radiation-pressure force, leading to larger orbit error, as demonstrated by simulation. Then as a case study, detailed formulas are derived to calculate the sensi- tivities for sailcrafts with four triangular sails. According to these formulas, in order to reduce both types of sensitivities, the angle between opposed sails should not be too large, and the center of mass should be as close to the axis of symmetry of the four sails as possible and as far away from the center of pressure of the sailcraft as possible.

关 键 词：Statically stable sailcraft Sensitivity Solar- radiation-pressure force error. Mass center and pressure cen- ter errors Attitude and orbit errors 

分 类 号：P642.22[天文地球—工程地质学] TM712[天文地球—地质矿产勘探]