摘要
航天器的在轨机动可能导致液体燃料出现包括非线性晃动在内的复杂动力学行为。采用运动脉动球模型(MPBM)对液体非线性旋转晃动问题进行了研究,并通过开展地面试验验证了MPBM仿真结果的准确性。首先,在MPBM的建模过程中以晃动回复力的形式考虑重力的影响,具体是通过虚功原理将重力作用引入到脉动球的能量变化过程。然后,搭建地面晃动试验平台,实现了对球型贮箱晃动现象的准确观测以及对晃动力和晃动力矩的实时测量。最后,以试验实测的加速度激励和晃动力为参照,采用MPBM进行了仿真与对比,仿真结果较好地匹配了试验结果。文中对液体晃动的合理抽象进一步地提升了等效力学模型对复杂晃动行为的仿真能力,为实现航天器更为高效、准确的在轨控制提供基础。
Spacecraft in-orbit maneuver can lead to complex dynamic behaviors of liquid fuel,including nonlinear sloshing.The moving pulsation ball model(MPBM)was used to study the nonlinear rotary sloshing of liquid.The accuracy of MPBM was verified by ground sloshing experiment.Firstly,the influence of gravity was considered as the form of sloshing recovery force during the modeling process of MPBM.Specifically,the effect of gravity was introduced into the energy change process of the pulsating sphere based on virtual work principle.Secondly,the ground sloshing experiment platform was built to realize the accurate observation of the sloshing phenomenon of the spherical tank and the real-time measurement of the sloshing force and the sloshing moment.Finally,based on the acceleration excitation and sloshing force measured in the experiment,MPBM was used to simulate and compare the simulation results.The simulation results matched the experimental results well.The reasonable abstraction of liquid sloshing in this paper further improves the simulation ability of the equivalent mechanical model for complex sloshing behaviors,and provides basis for the realization of more efficient and accurate in-orbit control.
作者
邓明乐
李友遐
许宏岩
吴文军
黄华
岳宝增
DENG Mingle;LI Youxia;XU Hongyan;WU Wenjun;HUANG Hua;YUE Baozeng(Institute of Telecommunication and Navigation Satellite,China Academy of Space Technology,Beijing 100094,China;School of Mechanical and Transportation Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;School of Astronautics,Beijing Institute of Technology,Beijing 100081,China)
出处
《中国空间科学技术》
CSCD
北大核心
2022年第6期125-133,共9页
Chinese Space Science and Technology
基金
国防科工局民用航天“十三五”技术预先研究项目(D020201)
国家自然科学基金(11802320,11862001)。
