亚轨道再入返回段高度上边界技术研究

Research on Upper-Limit of Altitude on Suborbital Reentry

针对重复使用运载器(RLV)亚轨道再入返回过程中动压、过载等约束条件对飞行安全的不利影响,通过分析质点动力学方程,提出亚轨道再入返回段RLV存在高度上边界并给出两种求解高度上边界的计算方法。高度上边界反映了亚轨道再入返回段的制导能力,它对总体决策和控制系统具有重要意义,RLV上升段的最终高度也必须限制在这个高度之下。分析和仿真结果表明,求解高度上边界的两种方法具有一定的鲁棒性和工程实用性。

During suborbital flying test,the constraints such as dynamic pressure and overload are two important factors influencing safety of reusable launch vehicle（RLV）,in order to solve this problem the upper-limit of altitude is proposed by analysis of point-mass dynamics equations,at the same time two methods are proposed to solve the upper-limit altitude.The upper-limit altitude reflects the ability of guidance of suborbital reentry,it plays an important role in the system decision and the design of control system.The guidance of ascent phase should also restrict the terminate altitude under this altitude.Analysis and simulation show that the two methods are robustness and practical.