航天器交会对接中液体燃料晃动等效模型研究  

Liquid Sloshing Equivalent Mechanical Model during Rendezvous and Docking

作　　者：王天舒[1] 苗楠[1] 李俊峰[1] 

机构地区：[1]清华大学航天航空学院,北京100084

出　　处：《空间控制技术与应用》2015年第3期1-7,共7页Aerospace Control and Application

基　　金：国家自然科学基金资助项目(11172145)

摘　　要：以航天器交会对接过程中的平移靠拢段作为背景,研究适用于零重力和微重力环境下液体运动的等效力学模型.以欧空局无人货运飞船(ATV,automatic transfer vehicle)中建立的等效模型为参考,提出一种适用于零/微重力球形贮箱中液体晃动的弹簧-质量等效力学模型.该模型的各个参数通过将基于CFD计算的参数辨识方法和用于常重力液体晃动的传统建模方法结合运用来获取.对该模型进行介绍,然后描述等效模型参数的获取方法,并利用虚功率原理推导了晃动力和力矩的求解方程.通过与CFD软件Flow-3d的结果进行对比,对这种建模方法的可行性和准确性进行了分析.Under the background of rendezvous and docking of vehicles in the approach phase in space, an equivalent mechanical model for liquid sloshing under zero-gravity and micro-gravity is investigated. Based on the model built in automatic transfer vehicle （ATV） , a spring-mass equivalent mechanical model applicable to liquid in spherical tanks under zero/micro-gravity is proposed. Parameters of this model are obtained by combining the method of parameter identification through CFD computation with traditional modeling method used for liquid sloshing in normal gravity. In this paper, introduction to this model is given first, then the approach to parameters of this model is described, and solution equations for slosh forces and moments are derived based on the principle of virtue power. Feasibility and accuracy of this modeling method are analyzed by comparing the slosh forces and moments to results of the compu- tational fluid dynamics （CFD） software Flow-3d.

关 键 词：液体晃动 等效力学模型 微重力 零重力 交会对接 

分 类 号：O353.1[理学—流体力学]