基线矢量约束GNSS单频单历元可靠姿态解算方法  

Reliable GNSS single frequency single epoch attitude determination algorithm with baseline vector constraints

作　　者：龚昂[1] 赵修斌[1] 庞春雷[1] 王勇[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《华中科技大学学报（自然科学版）》2017年第1期103-107,122,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61273049)

摘　　要：针对全球导航卫星系统(GNSS)单频、单历元姿态测量,将传统的基线长度约束扩展到包括角度和长度在内的基线矢量约束,提出了一种新算法.该算法利用基线三维先验信息,构造更加严格的模糊度代价函数,在搜索过程中将模糊度和基线坐标共同分为部分固定模糊度向量和实向量,由部分固定模糊度在基线矢量约束条件下逐步最优化求解实向量,压缩搜索空间,构建搜索树.相比于传统基线长度约束LAMBDA算法,模糊度固定成功率更高,实验条件下达到100%,并且具有相当的搜索效率和测角精度.实验同时验证了新算法对于先验姿态信息的容错程度,证明了算法的鲁棒性.For GNSS（global navigation satellite system）single epoch,single frequency attitude determination,a method was proposed to expand traditional baseline length constraint to vector constraints with heading,pitch and length.The method utilized baseline 3-dimensional priori-knowledge to reconstruct more rigid ambiguity objective function.During the search process,ambiguities and baseline coordinates were jointly divided into partially fixed ambiguity vector and real vector.Partially fixed ambiguity vector was used to resolve optimal real vector with baseline vector constraints and shrink search space to construct search tree.Compared to traditional baseline length constraint LAMBDA（least-square ambiguity decorrelation adjustment）method,this proposed method can achieve higher ambiguity fix success rate up to 100% with comparative searching efficiency and attitude determination precision.Experiments verify that the method is not much sensitive to the error of priori-knowledge,which proves its robustness.

关 键 词：全球导航卫星系统 基线矢量约束 姿态测量 整周模糊度 最小二乘模糊度去相关算法 

分 类 号：P228.4[天文地球—大地测量学与测量工程]