加速器准直控制网数据处理误差累积研究  

Data processing error accumulation of accelerator alignment control network

作　　者：王小龙[1,2,3] 康玲 董岚[1,2] 李波 门玲鸰[1,2] 罗涛 王铜[1,2] 梁静 何振强[1,2] 柯志勇 马娜[1,2] 卢尚 韩圆颖[1] 闫路平 张露彦[1] 刘晓阳 闫皓月[1] 李春华 吴蕾[1] 沈建新 张晓辉[1] WANG Xiaolong;KANG Ling;DONG Lan;LI Bo;MEN Lingling;LUO Tao;WANG Tong;LIANG Jing;HE Zhenqiang;KE Zhiyong;MANa;LU Shang;HAN Yuanying;YAN Luping;ZHANG Luyan;LIU Xiaoyang;YAN Haoyue;LI Chunhua;WU Lei;SHEN Jianxin;ZHANG Xiaohui(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523808,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]散裂中子源科学中心,东莞523808 [3]中国科学院大学,北京100049

出　　处：《核技术》2021年第9期23-31,共9页Nuclear Techniques

基　　金：国家自然青年科学基金(No.12075264)资助。

摘　　要：三维平差相比二维加一维平差具有更为严密的理论基础,但是将无约束的三维平差用于加速器准直控制网观测数据处理会出现严重的误差累积现象,致使平差结果严重扭曲变形。首先,从加速器控制网的布设方式、测量方式对三维平差数学模型进行分析,从理论上阐述了误差累积的来源和传播方式;然后,通过分析跟踪仪三维坐标测量模型、测点误差模型和模拟测量实验对跟踪仪测点精度特性、测网定位、定向精度特点和单站测量误差传播特点进行研究得出一系列结论,从原理上对加速器控制网三维平差高程和横向误差累积严重的现象做出了解释;最后,通过对直线控制网的模拟测量和平差计算对前述结论进行验证,并验证了两种误差累积的抑制方法,取得了很好的误差累积控制效果。[Background]Compared with 2D+1D adjustment,three dimensional adjustment has a more rigorous theoretical basis.However,when the unconstrained three dimensional adjustment is applied to the observation values processing of the accelerator alignment control network,serious error accumulation will occur and resulting in obvious distortion of the results.[Purpose]This study aims to expound the ways and characteristics of three dimensional adjustment error accumulation for accelerator alignment control network.[Methods]Firstly,based on the layout of accelerator alignment control network and the moving station measurement method of laser tracker,the three dimensional adjustment mathematical model was analyzed,and the least-squares collocation theory was used to clearly explain the error propagation.Secondly,the characters of laser tracker measurement accuracy,station positioning and orientation accuracy and single station measurement error propagation were studied by analyzing the laser tracker 3D coordinate measurement model,measurement point error model and simulation measurement experiments.Finally,adjustment calculation of the linac control network was verified by simulation measurement,and two error accumulation suppression methods were tested.[Results]The source and propagation mode of error accumulation are explained theoretically,and verified by simulation calculation,so are the serious error accumulation of elevation and lateral errors in three dimensional adjustment of control network in accelerator.[Conclusions]Providing high-precision point coordinate constraint for three dimensional adjustment can effectively suppress error accumulation,and providing high-precision orientation constraint for station coordinate system can also achieve the effect of suppressing error accumulation.

关 键 词：三维平差 加速器准直控制网 激光跟踪仪 误差累积 转站测量 

分 类 号：TL505[核科学技术—核技术及应用]