CAJ | 학술논문

为分析星敏感器内部各误差因素对其测量精度的影响，建立了星敏感器的理想模型和实际模型；基于几何成像理论，分析了焦距误差、主点偏移、光学镜头畸变、焦平面倾斜以及焦平面绕视轴方向的旋转等误差因素对星光成像矢量测量精度、视场内星间角距测量精度的影响，设计了测量精度评价指标，并通过仿真实验进行了定量分析，论证了不同参数误差、不同观星方位与测量精度的关系，焦距误差、主点偏移和镜头畸变是影响测量精度的主要因素，在使用时必须加以校正。
위분석성민감기내부각오차인소대기측량정도적영향，건립료성민감기적이상모형화실제모형；기우궤하성상이론，분석료초거오차、주점편이、광학경두기변、초평면경사이급초평면요시축방향적선전등오차인소대성광성상시량측량정도、시장내성간각거측량정도적영향，설계료측량정도평개지표，병통과방진실험진행료정량분석，론증료불동삼수오차、불동관성방위여측량정도적관계，초거오차、주점편이화경두기변시영향측량정도적주요인소，재사용시필수가이교정。
To analyze the effect of various inner error factors of star sensor on measurement accuracy,the ideal and actual models of star sensor were set up .Based on geometric imaging principle,the impacts of such error factors as focal length uncertainty,principal point displacement,lens distortion,tilt and rotation about visual axis of focal plane etc .on measurement accuracy of starlight imaging vector and of angle separations between stars in FOV were analyzed .The evaluation indicators of measurements accuracy were proposed,and quantitative analysis was made through simulation .The relationship of parameter error and star observing direction with measurements accuracy was discussed .It is showed that the focal length uncertainty,principal point displacement and lens distortion are the main influential factors of accuracy,which should be corrected before use .