Application of Robust Helmert Component Estimation in Adjustment of Metro CPⅢ Control Network
In order to make the data weighting of CPⅢ control network reasonable,improve the accuracy of adjustment results,and have the characteristics of anti gross error,the paper proposes to use Huber's Helmert robust component estimation weighting method to carry out reasonable weighting adjustment for three types of observations in the CPⅢ control network:horizontal angle,vertical right angle,and slant distance.Taking the right line CPⅢ control network survey project of the section between Ximen Station and Dongjiekou Station of Fuzhou Rail Transit Line 4 Project as an example,the rationality and reliability of the weighting method have been verified,and adjustment results with small point deviation,reliable accuracy,and the ability to resist gross errors can be obtained.
CPⅢ control networkweight calculationrobust Helmert variance component estimationadjustment
NETL
NSTL
万方数据
