红外星模拟器星点位置分析与模拟技术研究

Research on star points position analysis and simulation technology of infrared star simulators

针对传统星点位置误差测试方法无法应用于红外星模拟器,提出了一种红外星模拟器星点位置分析、模拟与测试的新方法。结合传统星模拟器星点位置测试方法,分析像差对星点位置的影响因素,建立像差与星点位置模拟理论模型,并通过误差拟合,分析出像质好则单星位置误差小的理论关系。依据红外星模拟器与星敏感器的对接方式,设计了出瞳距大且外置的可见和红外光双重组态下的准直光学系统,并实现红外波段像质优于可见光波段像质。利用经纬仪实测,验证理论模型的准确性,同时实测结果表明,可见光波段单星位置误差优于±13.65″,红外波段间接实现单星位置误差优于±13.65″。

The traditional star points position error testing method cannot be applied to infrared star simulators.To address this issue,a new method for star points position analysis,simulation and test of infrared star simulators is proposed.Combined with the traditional star points position testing method of star simulator,the influence of aberration on star points position simulators is analyzed.The theoretical model of aberration and star points position simulation is formulated.Through error fitting the theoretical relationship that good image quality represents small single star points position error is analyzed.According to the docking mode of star simulator and star sensor,a visible and infrared light dual configuration collimating optical system with large exit pupil distance and an external position is designed,which could make the image quality of infrared band better than that of visible band.The accuracy of the theoretical model is evaluated by theodolite measurement.The actual measurement results show that the single star position error in visible band is better than±13.65″.It indirectly realizes the single star position error in infrared band better than±13.65″。