重力对大型可展开天线热变形测试结果影响分析与验证  

Gravity Influence on Thermal Distortion of a Large Deployable Antenna

作　　者：王朋朋[1] 王波[1] 师甜[1] 郑士昆[1] 马小飞[1] WANG Pengpeng;WANG Bo;SHI Tian;ZHENG Shikun;MA Xiaofei(Xi’an Institute of Space Radio Technology,Xi’an 710100)

机构地区：[1]西安空间无线电技术研究所,西安710100

出　　处：《机械工程学报》2021年第3期69-76,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(U1537213)。

摘　　要：研究重力对某大型可展开天线热变形测试结果的影响,通过仿真计算和试验测试对重力影响程度进行了分析和验证。首先,对大型可展开天线热变形来源进行了归类分析,并从中找出了受重力场影响的关键因素。然后,将重力场对各个误差来源的影响程度进行了详细分析,影响以天线位移变化的形式给出,并最终得出对整天线热变形的影响。最后,对天线在卸载和不卸载状态下的热变形进行了测试,测试结果显示,对文中所指的大型可展开天线,重力引起的热变形结果偏差均方根为0.046 mm,该误差与系统测试误差相当,因此,可以认为天线热变形测试结果对重力不敏感。Gravity influence on thermal distortion of a large deployable antenna is studied. Both numerical simulations and tests are extended together to evaluate and verify influence of gravity on thermal distortion results. Firstly, composition of the antenna thermal distortion is analyzed to find the main sources of differences which will change the thermal distortion results with gravity or without gravity. Secondly, the main sources of differences are estimated step by step, and the influences are given in form of displacements, then displacements of different parts are combined to get the final distortion of the antenna. Eventually, thermal distortion test of the antenna is conducted in zero g(by gravity off loading systems) and one g environment to verify the numerical analysis results.

关 键 词：重力影响 热变形 大型可展开天线 

分 类 号：V474[航空宇航科学与技术—飞行器设计]