航天器工程2017，Vol.26Issue(5)：40-45,6.DOI:10.3969/j.issn.1673-8748.2017.05.007
星载柔性可卷天线固有频率提升方法研究
Study on Methods to Increase Natural Frequency of a Spaceborne Flexible Coilable Antenna
摘要
Abstract
Flexible coilable antenna is a new kind of deployable antenna which is stored by coiling.Due to the complex space environment, dynamic characteristic of the antenna has direct influence on the shape and accuracy of the surface,thus affecting the communication of a satellite. For the problem of the antenna's insufficient stiffness, the antenna's first two orders modes, corresponding to the coupling vibration of the surface and masts, are ana-lyzed based on the finite element method.In order to increase the first two orders'frequen-cy,changes of components' geometric dimensions and materials are discussed. It is con-cluded that the natural frequency has a linear relation with the masts'stiffness,and it de-creases with the increase of surface mass. Therefore, emphasis should be centered on the strengthening of masts and low-mass surface is preferred. In addition, two kinds of cable designs are provided to avoid cantilever layout,based on which,the influences of cable pre-tension and cable stiffness are discussed.With enough cable stiffness,the natural frequency could exceed 2 Hz.关键词
可卷天线/有限元/模态/固有频率Key words
coilable antenna/finite element/mode/natural frequency分类
航空航天引用本文复制引用
陈夜,周徐斌,杜三虎..星载柔性可卷天线固有频率提升方法研究[J].航天器工程,2017,26(5):40-45,6.基金项目
国家重大科技专项工程 （）
