摘要
为研究星体进行调姿运动时柔性抛物面天线的弹性变形对其视在相位中心的影响,建立了计算抛物面天线动态几何焦点的数学模型,并通过航天器动力学模型对姿态调整过程中天线焦点的动态响应进行数值求解.建立由抛物面天线、太阳帆板和中心星体组成的整星有限元模型,并求出天线无约束边界条件下的固有频率和振型.通过有限元模型和ADAMS联合仿真建立航天器零次刚柔耦合动力学模型并求得姿态调整过程中天线几何焦点的动态响应特性.结果表明,航天器进行姿态调整时,柔性天线面在做大范围整体运动的同时发生弹性振动,使其几何焦点在平衡位置震荡,严重影响星载天线的指向精度.
To study the effects of the elastic deformation of flexible paraboloid antenna on the approximate phase center in the stage of attitude adjustments,the mathematical model for solution paraboloid antenna dynamic geometric focus was established and its dynamic response characteristics were solved numerically. The FE model composed of the central platform,solar panels and paraboloid antenna was established and the natural frequencies and mode shapes of the antenna in unconstrained state were calculated. Then through co-simulation of FEM and ADAMS the zero-order rigid-flexible coupling dynamic model of the spacecraft was established,and the dynamic response of the antenna geometric focus in the process of attitude adjustments were obtained. Results show that the flexible attachments elastic vibration accompanves with rigid motions in the procedure of attitude adjustments,and the geometrical focus shock in the equilibrium position reduces spaceborne antenna pointing accuracy to some extent.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2017年第2期139-144,共6页
Journal of Harbin Institute of Technology
关键词
柔性抛物面天线
视在相位中心
几何焦点
刚柔耦合
动态响应
flexible paraboloid antenna
approximate phase center
geometric focus
rigid-flexible coupling
dynamic response
作者简介
李媛媛（1991-）女，博士研究生；
王聪（1966-）男，教授，博士生导师通信作者：王聪，alanwang@hit．edu．cn
