工程平面控制网置平平差的方法研究  

Calculation method of soft fixed adjustment for engineering horizontal network

作　　者：宋韬[1] 刘成龙[1] 杨雪峰[1] 何永军[1] 蒲星钢[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都610031

出　　处：《铁道科学与工程学报》2013年第3期82-86,共5页Journal of Railway Science and Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(SWJTU12ZT07;SWJTU12BR014)

摘　　要：提出一种将秩亏自由网平差和三参数坐标转换相结合的平面控制网平差方法,其特点是在平差过程中控制网整体网形不因上级控制点点位的改变而变化。首先介绍秩亏自由网平差及其精度评定的原理,推导进行控制网三参数坐标转换及对置平后的控制网进行精度评定的数学模型。仿真计算结果证明了对传统边角控制网而言,置平平差较约束平差具有更强的抗原始数据误差的能力,是一种工程平面控制网平差的新方法。A new calculation method for horizontal network which is combined with adjustment of rank defect free network and three - parameter coordinate transformation was proposed. Its characteristic is that the integral shape of the network doesn＇ t change due to the variation of the position of superior control points. Firstly, the principle of calculation for adjustment of rank defect free network was introduced and then the mathematical model for three - parameter coordinate transformation and precision evaluation of the network after soft fixed adjustment were derived. The simulation results demonstrate that soft fixed adjustment has a stronger resistance to the original data error compared with constrained adjustment for the traditional horizontal network. Therefore, soft fixed adjust- ment can be used as a new method for the data processing of engineering horizontal network.

关 键 词：置平平差 秩亏自由网平差 三参数坐标转换 仿真计算 原始数据误差 

分 类 号：P258[天文地球—测绘科学与技术]