基于FBG传感器的卫星天线形变重构技术  

Satellite antenna deformation reconstruction technology based on FBG sensors

作　　者：赵继春 李元浩 宋育苗 安国文 贾平岗[1] 熊继军[1] ZHAO Jichun;LI Yuanhao;SONG Yumiao;AN Guowen;JIA Pinggang;XIONG Jijun(State Key Laboratory of Dynamic Measurement Technology,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学省部共建动态测试技术国家重点实验室,山西太原030051

出　　处：《红外与激光工程》2024年第6期135-145,共11页Infrared and Laser Engineering

基　　金：国家自然科学基金项目(51935011);国家科技重大专项(J2019-V-0015-0110);山西省科技创新人才团队专项(202204051001016)。

摘　　要：针对由温度变化和外界机械载荷等因素引起的卫星天线结构形变重构需求,提出了一种基于光纤布拉格光栅(FBG)传感器的可视化形变重构技术。利用非金属封装材料和聚酰亚胺光纤光栅制备了FBG应变传感器和温度传感器进行应变与温度的测量,采用光纤传感解调系统实现结构的形变重构。搭建了变温环境天线结构模拟试件形变重构测试平台,采用激光测距仪完成对比测试。研究结果表明,通过相同工艺制备的FBG传感器具有很好的一致性,常温下FBG传感测量的误差小于5.94%,变温环境下的测量误差小于6.97%。重构后的曲面能够真实反映模拟试件的形变情况,验证了该系统的有效性。该技术在卫星天线结构形变重构领域中有良好的应用前景。Objective In the current era of rapid digitalization,communication satellites play an extremely crucial role.When satellites are in orbit,the antenna is subject to temperature and external mechanical forces,resulting in thermal and mechanical deformations.These deformations cause distortions in the beam direction,significantly impacting the quality and reliability of information transmission.Therefore,reconstructing the deformation of satellite antennas and promptly correcting the phase of the output signals is crucial to ensure the performance of satellite communication.Fiber Bragg Grating(FBG)sensors have made significant progress in structural deformation reconstruction due to their sensitivity to deformation,small size,capability for multi-point measurements through serial connections,and immunity to electromagnetic interference.As the installation process can influence the sensing performance of FBG sensors,the author has developed FBG strain sensors and temperature sensors and designed an FBG deformation reconstruction system suitable for deformation measurements in variable temperature environments.Methods To achieve deformation reconstruction of satellite antennas using FBG sensors,we prepared FBG sensors using polyimide fiber gratings and conducted deformation reconstruction experiments on metal thin plates.Firstly,we analyzed the deformation field reconstruction algorithm based on discrete strain information on the structure surface.Subsequently,with the aid of a self-developed packaging device(Fig.4),we encapsulated the polyimide fiber Bragg gratings with non-metallic packaging materials,thereby preparing fiber Bragg grating strain sensors(Fig.2)and fiber Bragg grating temperature sensors(Fig.3)for deformation reconstruction.The layout of FBG sensors was analyzed using wavelength division multiplexing technology(Fig.6).FBG sensors were calibrated using equally strong cantilever beams and high-low temperature chambers(Fig.11).A three-dimensional deformation reconstruction test platform for simulating sa

关 键 词：形变重构 FBG传感器 应变检测 温度解耦 卫星天线 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]