关键部件刚度对环形可展开天线频率影响研究  

A method of modifying Hoop Column Deployable Antenna(HTDA)'s natural frequency

作　　者：师甜[1] 肖勇[1] 于新战[1] 

机构地区：[1]中国空间技术研究院西安分院,陕西西安710100

出　　处：《电子设计工程》2013年第22期59-61,65,共4页Electronic Design Engineering

基　　金：国家自然科学基金(11290154)

摘　　要：针对环形桁架可展开天线的一阶振动提出了一种被动控制方法,通过调整环形桁架可展开天线关键部件的刚度来改变环形桁架可展开天线的固有频率,使之与激振频率错开,从而避免共振,最终使振动自由衰减下来,达到振动抑制的目的。斜支撑杆为环形天线关键部件,文中对由斜支撑杆刚度改变引起的环形桁架可展开天线频率的变化进行了计算,分析了环形天线一阶振动时斜支撑杆的应力分布情况,结果表明斜支撑杆轴向刚度对环形天线频率影响最大,且越靠近斜支撑杆根部影响越明显。A method of vibration control was proposed in this paper. The analytic result of the Hoop Column Deployable Antenna （HTDA） indicated that the natural frequency of the HTDA was modified by modifying the important part＇s stiffness. The natural frequency was different from the frequency of the force, so the sympathetic vibration can be avoided. The change of the HTDA＇s natural frequency caused by the skew bar＇s stiffness was calculated in this paper. The stress distribution of the skew bar was analyzed. The analytic result showed that the axial stiffness of the skew bar is chief for the HTDA and the stiffness of the skew bar＇s tip is more important than other part.

关 键 词：共振 环形天线 应力 刚度 

分 类 号：TN821[电子电信—信息与通信工程]