基于小样本试验数据再入偏差折合及评估方法研究  

Research on Reentry Error Reduction and Evaluation Method Based on Small Sample Test Data

作　　者：严东升[1] 贾平会 郭珂[1] 秦绪国[1] 唐林卡[1] Yan Dong-sheng;Jia Ping-hui;Guo Ke;Qin Xu-guo;Tang Lin-ka(Beijing Institute of Space Long March Vehicle,Beijing,100076)

机构地区：[1]北京航天长征飞行器研究所,北京100076

出　　处：《导弹与航天运载技术》2021年第1期45-49,71,共6页Missiles and Space Vehicles

摘　　要：为了评估目标射程状态下再入偏差精度指标分配,提出一种基于小样本试验数据再入偏差折合及评估方法。首先分析再入段干扰因素对飞行器再入运动特性及落点偏差影响机理,建立考虑各种再入偏差因素影响动力学和运动学计算数学模型,计算干扰条件下目标射程和试验射程再入偏差,求出试验射程至目标射程再入误差折合系数,分离试验条件下再入偏差,并折合至目标射程状态。将该方法应用于飞行器试验数据分析,得到了小子样试验数据条件再入偏差评估结果。方法及研究结果对再入误差分析计算和落点偏差精度指标评定具有重要应用价值。To evaluate the distribution index of reentry deviation in the target range,a evaluation method of reentry deviation is proposed based on small sample test data.Firstly,the RV’s interference factors and the influence mechanism are analyzed,and a reentry error computation model is established,based on which the results of reentry error considering interference factors are calculated separately for target range condition and test range condition.Then RV’s reentry error for test range condition is obtained by analyzing flight test data,and it is converted to the target range condition.By applying the flight test small sample reentry error evaluation method,it can be concluded that the maximum reentry deviation of target range are within the range of indicators assigned.The method and results have important application value to the analysis and calculation of the reentry error and the evaluation of the impact accuracy.

关 键 词：再入偏差 误差折合 精度评估 

分 类 号：V412[航空宇航科学与技术—航空宇航推进理论与工程]