激光跟踪仪自适应加权秩亏三维光束法平差  

Self-Adaptive Weighted Rank-Defect 3D Bundle Adjustment of Laser Tracker

作　　者：苗学策 丁克良 罗涛 何晓业[2] 王巍[2] 刘桂民 Miao Xuece;Ding Keliang;Luo Tao;He Xiaoye;Wang Wei;Liu Guimin(School of Geomatics and Urban Spatial Informatics,Beijing University of Civil Engineering and Architecture,Beijing 102616,China;National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,Anhui,China;School of Physics,Sun Yatsen University,Guangzhou 510275,Guangdong,China)

机构地区：[1]北京建筑大学测绘与城市空间信息学院,北京102616 [2]中国科学技术大学国家同步辐射实验室,安徽合肥230029 [3]中山大学物理学院,广东广州510275

出　　处：《中国激光》2023年第6期81-88,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金青年基金(11705199);中国高校基本科研业务费重要方向项目培育基金(WK2310000085)。

摘　　要：针对激光跟踪仪光束法平差,基于稳健估计理论中的选权迭代法,提出一种自适应加权秩亏三维光束法平差解法,通过对观测值选权判定阈值与秩亏平差基准方程权的自适应调整,能够准确识别粗差并抵御其影响。通过仿真实验验证了方法的可行性,并在合肥先进光源预研平台进行了实测验证,实验结果与SpatialAnalyzer软件的处理结果精度相当,可为准直测量数据处理提供抗差结果参考。Objective China is currently planning on building several 4th-generation light source facilities that are larger in scale and have highly complex equipment.Therefore,higher alignment and global control point accuracies are required to ensure the robust and stable operation of the facility.The accuracy requirement has reached the measurement accuracy limit of laser trackers.It is of great significance for the construction and development of 4th-generation light source facilities to explore high-precision and stable data processing methods for laser trackers.In this study,an improvement on the existing adjustment method for the control network,which can retain the extremely high accuracy of laser tracking data while avoid some small and unidentifiable gross errors that will affect the overall processing results,is proposed.Methods Based on robust estimations,an adaptive weighting strategy for rank-defect weighted 3D bundle adjustment that can adaptively adjust the weight matrix of the observed values and weight matrix of the datum equation to achieve robust estimation is employed in this study.Simultaneously,due to data processing using routine robust estimation without any gross error,gross error misjudgment can also be avoided.First,after the first iteration of adjustment,the sum of the residuals less than or equal to the product of the mean value of the two selected weight thresholds and mean square error is calculated.If this value is less than half of the total numbers of observations,the thresholds are considered to be set too low,and vice versa.The two thresholds are corrected proportionally by multiplying them with a specific correction factor when the threshold is high and dividing them by the same factor when the threshold is low.Along with the iteration process,the selected weight thresholds are dynamically and adaptively adjusted to allow the dynamic and adaptive adjustment of the weight of the observed values.This process ends when the changes in the threshold are less than 0.001.Simultaneously,accordi

关 键 词：测量 激光跟踪仪测量 自适应加权平差 秩亏光束法平差 抗差估计 

分 类 号：P207[天文地球—测绘科学与技术]