【摘要】 以大型航天柔性结构如太阳能帆板为试验模型对象,针对太空柔性结构振动状态监测与主动控制技术需求,着重进行光纤光栅机敏结构振动形态感知与重构试验研究。技术方法上基于分布植入式FBG离散传感网络及其空分复用和波分复用特性,实现模型结构分布多点曲率信息检测,基于三维曲面拟合算法实现结构形态重构与可视化;综合闸述试验方案与过程,包括技术方案分析、试验对象设计、试验平台构建、试验过程描述与试验结果分析等;试验结果与验证表明,光纤光栅机敏柔性结构低模态振动形态感知与现场可视化是切实可行的,试验过程不仅效果生动逼真,而且比较精确地反映了结构振动形态,研究结果为航天柔性结构振动形态实时监测提供了技术探索思路。更多还原

【Abstract】 This paper focuses on the research of the vibration shape perception and reconstruction based on fiber grating network and uses the large flexible space structures(e.g.solar panel) as the experiment object to meet the technique requirement of the vibration state monitoring and active control of the aerospace flexible structures.Utilizing the space division multiplexing and wavelength division multiplexing properties of distributed implantable FBG sensor networks,the detection of the multipoint curvature information of the model structures is accomplished,and the reconstruction and the visualization of the vibration shape is also realized using the 3D surface fitting algorithms. The detailed experiment scheme and process are illustrated,including analysis of the technical points,design of the experiment object,construction of the experiment platform,description of the experiment process,analysis of the experiment results,and so on.Experiment results validate the feasibility of the flexible structure low order mode vibration shape perception and real-time visualization based on fiber grating network.The vividness and accuracy of the reconstructed vibration shape indicate that this paper provides a technique exploration idea for the real-time vibration shape monitoring of the aerospace flexible structures.更多还原