基于多源系统融合的结构形态感知技术  

Structural Form Sensing Technology Based on Multi-source System Fusion

作　　者：孙静 林雪竹[1] 郭丽丽 刘悦 闫东明 李丽娟[1] SUN Jing;LIN Xuezhu;GUO Lili;LIU Yue;YAN Dongming;LI Lijuan(College of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《光子学报》2023年第2期209-224,共16页Acta Photonica Sinica

基　　金：吉林省科技发展计划重点研发项目(No.20200401019GX);中山市社会公益科技研究项目(No.2022B2013)。

摘　　要：针对薄壁结构零件在装配过程中由于装配状态变化存在的装配受力变形问题,结合数字孪生发展背景,提出一种激光跟踪、视觉测量、光纤监测多源系统融合的结构形态感知技术。首先,建立多源系统多站位坐标统一模型,实现坐标基准统一;其次,建立异构数据融合模型,完成光纤监测波长与空间点坐标异构数据统一,基于高斯过程实现多源数据融合,预测变形点云,实现产品结构形态感知;最后,以蒙皮薄壁结构为例,模拟装配变形实验。结果表明,融合方法所感知数据更好地反应实际变形,其平均相对误差为4.66%,绝对误差保持在0.016 mm。多源异构数据融合基于实测数据预测形变点云,可实现结构实时变形监测,从而简化视觉测量方式,提高了曲面信息保真度,为动态孪生模型构建提供新思路。With the development of digital twin technology,the intelligent measurement degree of aerospace assembly products is getting higher and higher.Assembly of large parts is the basis of product performance,and assembly accuracy is an important index to ensure product quality.During the process of skin assembly,the deformation of the assembly force structure with the change of state will result in interference between thinwalled parts,and the forced positioning will affect the stability and safety of the product structure.Digital twin technology has the characteristics of multi-source,heterogeneous,massive,real-time and so on.The twin model gathers all the data obtained by acquisition,reading and fusion.It is particularly important to measure and perceive the product structure to obtain the real state information of components.Therefore,real-time sensing of structural deformation not only meets the characteristics of dynamic updating of the digital twin assembly model but also plays an important role in realizing the high-precision assembly of products.In this paper,based on the characteristics of real-time perception of product form and large-scale measurement field,combined with different measurement advantages of laser tracking,visual measurement and fiber monitoring system,a multisource system fusion measurement model is constructed.The structural morphology sensing technology based on multi-source system fusion has the characteristics of real-time monitoring,which is not limited by the assembly state,and can effectively reduce the frequency of visual measurement deformation.The high-fidelity data obtained can provide a reference for constructing the twin assembly model.Firstly,the multi-station coordinate unified model of the multi-source system was established,and the pose relationship between multisource systems was established based on the global coordinate system,so as to realize the measurement network fusion of multi-source system.Secondly,the heterogeneous data fusion model was established,and the heterog

关 键 词：数字孪生 多源系统测量 异构数据融合 高斯过程回归 结构变形 

分 类 号：TH741[机械工程—光学工程]