| 一种新型RLV再入轨迹在线规划方法 |
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| 引用本文： | 沈振,胡钰,任章,宋剑爽.一种新型RLV再入轨迹在线规划方法[J].宇航学报,2011,32(8):1670-1675. |
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| 作者姓名： | 沈振 胡钰 任章 宋剑爽 |
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| 作者单位： | 北京航空航天大学飞行器控制一体化技术重点实验室，北京 100191 |
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| 基金项目： | 国家自然科学基金重大研究计划资助项目(90916003) |
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| 摘 要： | 针对可重复使用运载器(Reusable Launch Vehicle, RLV)再入轨迹在线规划问题，提出了一种基于割线法的标准轨迹快速生成方法。该方法以驻点热流、法向过载、动压和平衡滑翔限制为再入过程约束，以再入初始点和结束点的高度、速度为再入端点约束；在阻力加速度-速度平面内建立约束模型后，设计了折线形式的标准轨迹；采用割线法迭代计算轨迹转折点以调整轨迹形状，使最终规划轨迹对应的航程和终端点速度同时满足设计需求。最后取3种不同航程的再入情况进行了数值仿真。仿真结果表明，所提出的方法能够在1秒内完成再入轨迹规划，并在一定航程范围内适用，能够满足在线设计标准再入轨迹的实时要求。
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| 关 键 词： | 可重复使用运载器 再入 标准轨迹 在线规划 割线法 |
| 收稿时间： | 2010-08-04 |
A New On-Line Planning Method for RLV Reentry Trajectory Design |
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| SHEN Zhen,HU Yu,REN Zhang,SONG Jian-shuang.A New On-Line Planning Method for RLV Reentry Trajectory Design[J].Journal of Astronautics,2011,32(8):1670-1675. |
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| Authors: | SHEN Zhen HU Yu REN Zhang SONG Jian-shuang |
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| Institution: | Science and Technology on Aircraft Control Laboratory, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | A novel on-line planning method is proposed based on the secant method for RLV reentry trajectory design.Constraints during reentry are analyzed,and the stagnation point heat flow,the normal load,the dynamic pressure and the equilibrium glide constraint are selected as the main path constraints,also the heights and the velocities of the initial and terminal points are specified,all of which are expressed in D-V forms.The reference trajectory is then designed as a two-segment piecewise fold line.The secant m... |
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| Keywords: | RLV Reentry Reference trajectory On-line design Secant method |
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