| 高度-速度剖面内再入轨迹快速规划 |
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| 引用本文： | 周文雅,聂振焘,刘凯.高度-速度剖面内再入轨迹快速规划[J].宇航学报,2019,40(11):1341-1347. |
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| 作者姓名： | 周文雅 聂振焘 刘凯 |
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| 作者单位： | 1. 大连理工大学工业装备结构分析国家重点实验室,大连 116024；
2. 大连理工大学辽宁省空天飞行器前沿技术重点实验室,大连 116024 |
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| 摘 要： | 提出一种升力式再入航天器进入稠密大气后的轨迹规划方法。在预先设定攻角剖面的前提下，利用路径约束(驻点热流、动压和过载)在高度-速度(H-V)剖面内直接获得轨迹下边界；利用终端约束确定以轨迹下边界为基准的高度增量，进而通过下边界与高度增量的加和形成满足要求的再入轨迹。其中，增量的形式选取为分段二次型函数，其大小可通过割线法快速获得。倾斜角大小可根据纵向动力学方程反解得到，其方向依据航向误差角走廊确定。通过对典型工况的仿真，结果表明所提方法能够快速规划出再入轨迹，且适应性好。
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| 关 键 词： | 高度速度(H-V)剖面 再入轨迹规划 路径约束 终端约束 二次型增量 |
| 收稿时间： | 2019-01-23 |
Rapid Planning of Reentry Trajectory in Height Velocity Profile |
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| ZHOU Wen ya,NIE Zhen tao,LIU Kai.Rapid Planning of Reentry Trajectory in Height Velocity Profile[J].Journal of Astronautics,2019,40(11):1341-1347. |
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| Authors: | ZHOU Wen ya NIE Zhen tao LIU Kai |
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| Affiliation: | 1. State Key Laboratory of Structure Analysis for Industrial Equipment, Dalian University of Technology， Dalian 116024, China;
2. Liaoning Provincial Key Laboratory of Aerospace Advanced Technology, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | A reentry trajectory planning method is proposed for the lifting reentry vehicle in the dense atmosphere. With the preset profile of angle of attack, the path constraints (heating rate, dynamic pressure and overload) are used directly to obtain the lower boundary of the reentry trajectory in the height-velocity profile; the terminal constraints are used to determine the height increment on the basis of the lower boundary, and then the reentry trajectory is generated by adding the height increment to the lower boundary. The increment is selected in the form of a segment quadric function, and its magnitude can be obtained quickly by the secant method. The magnitude of the bank angle can be obtained according to the dynamic equation, and the sign of the bank angle is determined by the heading error angle corridor. The simulation results under the typical working conditions indicate that the proposed method can plan the reentry trajectory rapidly with good adaptability. |
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| Keywords: | H-V profile Reentry trajectory planning Path constrains Terminal constrains Quadratic increment |
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