Rapid resolution of integer ambiguity in integrated GPS/gyro attitude determination

被引：0
|
作者：
Wang, Bing [1 ,2 ]
Sui, Lifen [2 ]
Wang, Wei [3 ]
Ma, Cheng [4 ]
机构：
[1] Unit 61081, Beijing
[2] Institute of Surveying and Mapping, Information Engineering University, Zhengzhou
[3] Unit 61741, Beijing
[4] Unit 61206, Beijing
来源：
Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2015年 / 40卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Attitude determination; Direction cosine matrix; GPS; Gyro; Integer ambiguity resolution; Kalman filter; MC-Lambda method;
D O I：
10.13203/j.whugis20130240
中图分类号：
学科分类号：
摘要：
One of key issues in the aspect of GPS-based attitude determination that must be solved is to estimate the unknown integer ambiguities. Single-epoch attitude ambiguity resolution can be achieved by using MC-Lambda method, which fully exploited the known geometry constraints of the multi-antennae configuration. This method does not need to consider cycle slip problem. However, the float solution precision of integer ambiguity is low based on GPS pseudo-range and carrier phase observations, which leads to large ambiguity search space and low search efficiency. For this reason, choosing the direction cosine matrix to describe the attitude and GPS/Gyro attitude determination model was established. The float solution of integer ambiguity was calculated by matrix kalman filter algorithm, and then the fixed solution of integer ambiguity was obtained by MC-Lambda method. Simulation experimental results showed that the accuracy of float solution by Kalman filter algorithm with constraints of direction cosine matrix are improved, so the computational efficiency and the fixing success rate of the fixed integer ambiguity are all improved, particularly when GPS observations is in the bad observation condition. ©, 2015, Wuhan University. All right reserved.
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页码：128 / 133
页数：5
相关论文
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