火星着陆轨迹优化与进入状态分析
首发时间:2014-12-09
摘要:在火星着陆任务设计中,进入状态分析是满足着陆精度和路径约束条件下保证着陆安全性与可靠性的有效方法。由于飞行器系统参数通过影响进入轨迹,进而影响标称轨迹生成和进入状态选择,本文首先给出了基于高斯伪谱法的轨迹优化方法,并研究了末端高度,飞行器升阻比,弹道系数,末端马赫数,过载约束等参数影响下的进入状态特征,进而为火星大气进入段任务设计中的飞行器系统参数和可行进入点选取,标称轨迹设计提供参考。
关键词: 飞行器设计 火星着陆 大气进入段 轨迹优化 进入状态分析 高斯伪谱法。
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Trajectory Optimization and Entry State Analysis for Mars Entry
Abstract:Entry state analysis is a beneficial method in satisfying landing accuracy and path constraints and achieving safety and reliability in Mars landing mission design. Considering the influence of entry vehicle parameters on entry trajectory, and furthermore, the generation of nominal trajectory and entry state, this paper takes the Gauss pseudospectral method as the method of trajectory optimization firstly, and then analyzes the influence of terminal altitude, lift-to-drag ratio and ballistic coefficient of entry vehicle, terminal Mach number and load factor constraint on the entry state distribution. This work can be beneficial for selection of entry vehicle parameter, feasible entry state and nominal trajectory generation in Mars entry mission design.
Keywords: Flight vehicle design Mars landing Atmospheric entry Trajectory optimization Entry state analysis Gauss pseudospectral method
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No.4621467102289814****
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