基于飞行弹道仿真的中型液体运载火箭核心战标评估方法研究

Key Technical Index Evaluation of Medium Liquid Launch Vehicle Based on Trajectory Simulation

摘要:

以长征七号甲为代表的中型液体运载火箭坚持“无毒、无污染、低成本、高可靠”原则，逐渐成为中国未来高轨大中型有效载荷发射的主力火箭；针对中型液体运载火箭核心性能指标和任务完成能力评估困难的问题，采用基于飞行弹道仿真的方法进行打靶仿真验证；通过对运载火箭飞行过程三自由度模型进行研究，构建中型液体运载火箭多学科弹道模型，创建火箭装备核心战标评估体系和数据体系，采用基于蒙特卡洛的多偏差仿真的技术方法，对中型液体运载火箭运载能力、入轨精度、残骸散布等核心战标进行评估计算和综合分析；搭建中型液体运载火箭评估系统软件平台对仿真评估方法进行验证；经实验测试实现了长征七号甲中型液体运载火箭仿真飞行过程建模和多偏差下的综合指标计算与结果生成。

Abstract:

Medium liquid launch vehicle (MLLV), Long March 7A (LM-7A or CZ-7A) for example, has been becoming Chinese future main rocket for high-orbit large and medium-sized payload launching due to the principle of non-toxic, pollution-free, low-cost and high-reliability. Considering the difficulty of evaluation of key property and capability of task accomplishing for MLLV, target practicing is adopted based on trajectory simulation. By researching the 3 degrees of freedom (DOF) flight model of launch vehicle, multi-subjects model and key technical index evaluation system of MLLV are established. Monte Carlo multi-deviation simulation is applied to assess and analyze the carrying capacity, orbit accuracy and wreckage distribution. MLLV evaluation system is developed to verify the simulation assessment method. Experiment based on the software platform provides validation of MLLV flight model construction, comprehensive index calculation and results generation.