临近空间落球探测仿真分析  

Simulation Analysis of Falling Ball Detection in Near Space

作　　者：刘卫 刘四清[1,3,4] 龚建村 王荣兰[1,4] LIU Wei;LIU Si-qing;GONG Jian-cun;WANG Rong-lan(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;Innovation Academy for Microsatellites,Chinese Academy of Sciences,Shanghai 201210,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Science and Technology on Environmental Space Situation Awareness,CAS,Beijing 100190)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院微小卫星创新研究院,上海201210 [3]中国科学院大学,北京100049 [4]中国科学院空间环境态势感知技术重点实验室,北京100190

出　　处：《装备环境工程》2020年第8期1-7,共7页Equipment Environmental Engineering

基　　金：北京市科技重大专项(Z181100002918004)。

摘　　要：目的基于硬质落球,分析探测临近空间大气密度和水平风场的载荷需求和探测性能。方法仿真计算自由下落探测段受力情况,建立运动方程。以假定释放条件,仿真落球的探测过程,给出各作用力量级。结果面质比的变化不能改变气动力范围。相同加计灵敏度下,增大面质比可提高探测高度。150 km以下的探测中可忽略光压力,探测到水平风场米级变化的加计灵敏度需求为1×10^-5m/s^2。结论面质比的变化不能改变气动力范围。相同加计灵敏度下,增大面质比可提高探测高度。The work aims to analyze the atmospheric density of near space and the load demand and detection performance of wind field based on hard falling ball.The force of free falling detection section was subject to simulating calculation and then a motion equation was established.Taking the assumed release condition as initial state,the detection process was simulated,and the acting force levels and ranges were given.The variation of the area-to-mass ratio(AM)could not change the range of aerodynamic force.Increased AM could improve detection height if at the same accelerometer sensitivity.The solar pressure could be neglected in the detection below 150 km.The meter level changes in horizontal wind field could be detected in case of accelerometer sensitivity 1×10^-5 m/s^2.In conclusion,the variation of the area-to-mass ratio(AM)cannot change the range of aerodynamic force.Increased AM can improve detection height if at the same accelerometer sensitivity.

关 键 词：临近空间 落球 仿真 作用力 

分 类 号：V11[航空宇航科学与技术—人机与环境工程]