中国空间科学技术

中国空间科学技术 ›› 2024, Vol. 44 ›› Issue (1): 44-53.doi: 10.16708/j.cnki.1000-758X.2024.0005

• 论文 • 上一篇    下一篇

基于进入圆球的火星大气密度与风速反演方法

韩碧，李萧，齐征   

  1. 1.北京中航智科技有限公司，北京100176
    2.西安飞行自动控制研究所，西安710000
    3.中国运载火箭技术研究院 空间物理重点实验室，北京100076
  • 出版日期:2024-02-25 发布日期:2024-02-01

Inversion method of Martian atmospheric density and wind velocity based on entry sphere

HAN Bi，LI Xiao，QI Zheng   

  1. 1.Beijing Zhonghangzhi Technology Co.，Ltd.Beijing 100176，China
    2.Xi′an Flight Automatic Control Research Institute，Xi′an 710000，China
    3.Laboratory of Science and Technology on Space Physics，China Academy of Launch Vehicle Technology，
    Beijing 100076，China
  • Published:2024-02-25 Online:2024-02-01

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摘要： 针对现有火星大气密度和风速探测方法的不足，提出了一种基于进入圆球的火星大气密度和风速反演方法。圆球携带加速度计和陀螺仪测量大气阻力加速度和姿态。基于圆球阻力加速度方向实现风速与密度解耦，设计了风速独立求解算法和基于高精度风速反演结果的密度求解算法，并通过理论分析和数值仿真对反演算法的误差进行了分析计算。仿真结果表明该方法可有效反演得到高精度火星中低层大气密度和风速，在80km以下，横向风速误差在8%以内，密度误差7%以内。

关键词: 火星大气, 进入圆球, 风速, 大气密度, 加速度计

Abstract:  A method for reconstructing Martian atmospheric density and wind velocity based on an entry sphere was proposed for the disadvantage of current detection methods.The sphere carries an accelerometer and a gyroscope to measure the drag acceleration and attitude.The wind velocity and density were decoupled based on the drag direction to solve the wind velocity independently，and the density was solved based on the high-precision wind velocity.The inversion algorithm error was analyzed through theoretical analysis and numerical simulation.The results show that the method can estimate the density and wind velocity of the middle and lower atmosphere effectively.The accuracy level of the transverse wind velocity and the density are less than 8% and 7%，respectively，below the height of 80km.

Key words: Martian atmosphere, entry sphere, wind velocity, atmospheric density, accelerometer