APS星敏感器太阳照射影响分析及试验验证

Analysis and Testing Validation of the Influence of Direct Sun Irradiation on the APS Star Tracker

针对APS星敏感器在轨过程中太阳照射问题进行了研究,分析了太阳照射对星敏感器功能和性能的影响,设计了太阳照射相关的试验及验证方案,最后给出了相关试验过程和试验验证结果,明确了分析及试验结论.通过分析和试验结果表明:紫外辐照试验对光学系统透过率无明显影响,且影响在APS星敏感器灵敏度余量范围内;在轨太阳照射对APS星敏感器探测器及整机的功能和性能无影响.相关分析和试验数据可作为星敏感器后续改进设计的依据和参考.

Star tracker is a type of optical sensor current used widely in spacecraft attitude control system, which provides the most accurate measurement. We study the direct sun irradiation problem of the APS star tracker on orbit, including its effect on the function and performance of star tracker. The experiment and validation schemes are designed. And a clear conclusion is obtained according to the experiment process and verification results. The analysis and experiment results indicate that the ultraviolet irradiation has no significant effect on optical transmittance, and is in the designed allowance range. The direct sun irradiation has no effect on the function and performance of the APS image sensor and star tracker. The analysis and experiment results can be used as the design basis and reference for star tracker subsequent improvement.