运载火箭小样本试验长度的确定方法

X. Duan, Zhengming Wang
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引用次数: 0

摘要

为了满足运载火箭试验评估的要求,必须充分考虑飞行器的特性和初始飞行误差。通过充分利用跟踪数据和地面试验数据,将特殊情况下制导仪器的系统误差(SEGI)转换为标准情况,提供了一种扩大样本量的新方法。根据SEGI系数的先验分布,提出了一种新的精度评价模型——贝叶斯样条模型,并对其性能进行了分析。对于给定的精度阈值,检验长度可以由上述模型的后验方差确定。最后,通过理论分析和仿真证明,该方法具有明确的工程背景,能够充分利用试验资源,使我们能够得出更合理的结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A method for determining the small-sample test length of carrier rocket
To satisfy the demand of test evaluation of carrier rocket, the character of aerocraft and the primary flight error should be well considered. By making full use of tracking data and ground test data, a new method is provided to expand sample size through converting the system error of guidance instruments (SEGI) of special case into standard case. In terms of the prior distribution of the SEGI coefficients, a novel model, named Bayes spline model, is developed for precision evaluation, and its performance is analyzed subsequently. For a given threshold of precision, the test length can be determined by the posterior variance with the afore-mentioned model. Finally, it is proved by theoretical analysis and simulation that this method has clear engineering background and is able to fully exploit the test resources and enables us to draw a more reasonable conclusion.
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