| 抗差Helmert方差分量估计在水下声学定位中的应用 |
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| 引用本文： | 孟庆波,王振杰,刘杨范,王柏杨.抗差Helmert方差分量估计在水下声学定位中的应用[J].海洋测绘,2019,39(5):70-74. |
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| 作者姓名： | 孟庆波 王振杰 刘杨范 王柏杨 |
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| 作者单位： | 中国石油大学(华东)地球科学与技术学院,山东青岛,266580;中国石油大学(华东)地球科学与技术学院,山东青岛,266580;中国石油大学(华东)地球科学与技术学院,山东青岛,266580;中国石油大学(华东)地球科学与技术学院,山东青岛,266580 |
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| 基金项目： | 国家自然科学基金(41374008)；国家重点项目研发计划(2016YFB0501700；2016YFB0501705)； |
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| 摘 要： | 水下声学定位观测数据中不可避免地存在粗差,随机模型解算广泛地采用等权模型,模型实现简单,但与实际不符,且不能抑制粗差影响。针对该问题,提出一种基于IGG3方案的抗差Helmert方差分量估计方法。该方法通过水深和观测距离将观测值分为两类,利用Helmert方差分量估计确定不同类观测值的权比,抗差解决了粗差导致Helmert方差分量估计模型失效的问题。实验结果表明,相比于传统解算方法,抗差Helmert方差分量估计方法可以合理确定各观测值权比,削弱粗差影响,提高水下定位精度和可靠性。
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| 关 键 词： | 水声定位 随机模型 抗差性 Helmert方差分量估计 粗差 |
Application of Robust Helmert Variance Component Estimation in Underwater Acoustic Positioning |
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| MENG Qingbo,WANG Zhenjie,LIU Yangfan,WANG Boyang.Application of Robust Helmert Variance Component Estimation in Underwater Acoustic Positioning[J].Hydrographic Surveying and Charting,2019,39(5):70-74. |
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| Authors: | MENG Qingbo WANG Zhenjie LIU Yangfan WANG Boyang |
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| Institution: | Shcool of Geosciences,China University of Petroleum,Qingdao 266580 ,China |
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| Abstract: | The equal weight model is widely used in underwater positioning which is easy to implement.However,it does not agree with the reality and has an impact on the positioning accuracy.Morever,in case of the fact that observation data are contaminated by the gross error, this model will distort the positioning result.Aiming at this problem,Robust Helmert variance component estimation (VCE) based on the IGG model 3 is presented.This method divides the observations into two categories through water depth and observation distance.The Helmert variance component estimation is used to determine the weight ratio of different types of observations.The robustness solves the problem that the Helmert VCE model fails due to the gross error.The experimental results show that compared with the traditional solution method,the robust Helmert VCE method can reasonably determine the weight ratio of each observation,weaken the influence of gross error,and improve the accuracy and reliability of underwater positioning. |
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