为了提高空间目标光学特性的计算精度,提出并实现了一种基于缩比模型实验的空间目标光学特性计算模型参数校验方法。首先,分析影响空间目标光学特性的主要因素,确定计算模型参数校验的总体方案;其次,构建空间目标光学特性实验测量系统,采集两类实验被测对象(表面材料与目标缩比模型)在不同条件下的光学特性数据;最后,建立基于实验测量数据的计算模型参数校验算法,对空间目标表面材料与几何结构的光学特性计算模型参数进行分步校验。实验结果表明,校模后的目标特性计算结果与实验结果在统计意义上趋近一致,该计算模型的校验方法可满足近程光学导航实际工程应用的要求。

In order to improve the precision of the space target optical characteristic calculation method,a verification and validation method for parameters of optical characteristic calculation model based on the target scale-model experiments is proposed.Firstly,the main influencing factors of the optical characteristics are analyzed,and the verification and validation scheme of the calculation model is proposed.Secondly,the experimental system is designed and the optical characteristics of two kind of targets are gained.Finally,the verification and validation algorithm is built up and parameters of the target surface materials and the geometryical construction are verified and validated step by step.It is showed that the results gained by the calculation model after verification and validation are close to the experimental results statistically.This verification and validation method can meet the requirement of short-range optical navigation.