微重环境小脉冲激励下液体晃动等效模型研究  

Equivalent Model of Liquid Sloshing under the Excitation of Small Pulse in Microgravity Environment

作　　者：陈宗宇 宋志军 吕敬[2] 王天舒[3] CHEN Zongyu;SONG Zhijun;LV Jing;WANG Tianshu(AVIC Aerospace Life-Support Industries Ltd.,Xiangyang 441003,China;School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China;School of Aerospace Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]航空工业航宇救生装备有限公司,襄阳441003 [2]北京航空航天大学航空科学与工程学院,北京100191 [3]清华大学航天航空学院,北京100084

出　　处：《空间控制技术与应用》2022年第3期84-92,共9页Aerospace Control and Application

基　　金：国家自然科学基金资助项目(12172213)。

摘　　要：针对空间攻防领域的航天器对接、抓捕等任务工况.研究了微重环境下的液体晃动问题.使用CFD数值实验的方法研究了微重环境下液体的晃动特性,实验结果显示:液体晃动可分为4个阶段,每个阶段的液体流动规律差别较大,其中,第1阶段的初始时间段充液系统的响应与激励成比例变化关系.利用此规律,提出小脉冲激励下的充液系统等效惯量模型,并设计数值实验验证了其正确性,模型误差为3.2%.除此之外,论文还研究了等效惯量模型的适用性,并得出模型的最佳适用范围.The liquid sloshing problem in the microgravity is studied in this paper.The conclusions of this research are suitable for spacecraft docking,capture and other mission conditions in the field of space attack-defense.In this paper,the method of CFD numerical experiment is used to study the sloshing characteristics of liquid in a microgravity environment.The experimental results show that the liquid swaying can be divided into four stages,and the liquid flow law in each stage differs greatly,among which,the response of the liquid-filled system in the initial time period of stage 1 is proportional to the excitation.Using this law,the equivalent inertia model of the liquid-filled system under small pulse excitation is proposed,and numerical experiments are designed to verify its correctness,with model error of 3.2%,respectively.In addition,the applicability of the equivalent inertia model is also investigated and the optimal range of application of the model is derived in this paper.

关 键 词：液体晃动 CFD 小脉冲激励 等效惯量模型 空间攻防 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]