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基于北斗降维双差模型的舰艇快速定姿算法研究

发布时间:2019-01-11 08:58
【摘要】:根据北斗GEO卫星的特殊星座构型,提出一种基于北斗降维双差模型的舰艇快速定姿算法。根据北斗GEO卫星的特点,在初始定位误差较小的情况下,忽略z轴误差带来的影响,建立降维双差模型。利用B_1和B_2频点形成宽巷组合,根据初始伪距值计算宽巷模糊度初始值,并解算基线向量候选值;通过模糊度函数法对候选值进行判决,得到最优基线向量,解出宽巷模糊度;最后以得到的最优基线向量为初始基线向量,利用B_1频点观测值形成2个双差观测方程,解算B_1频点模糊度,进行舰艇定姿。利用北斗实测数据进行仿真验证,结果表明该方法解算B_1频点模糊度成功率高,确定的航向角标准差为0.16°,纵摇角标准差为0.07°,是一种高效快速的舰艇定姿算法。
[Abstract]:According to the special constellation configuration of Beidou GEO satellite, a fast attitude determination algorithm based on Beidou reduced dimension double difference model is proposed. According to the characteristics of Beidou GEO satellite, the reduced dimension double difference model is established under the condition that the initial positioning error is small, and the influence of z axis error is ignored. The wide roadway combination is formed by using the frequency points of BSP _ 1 and B _ s _ 2. The initial value of ambiguity of wide roadway is calculated according to the initial pseudo-distance value, and the candidate value of baseline vector is calculated. The optimal baseline vector is obtained by judging the candidate value by the method of ambiguity function, and the ambiguity of wide lane is solved. Finally, taking the optimal baseline vector as the initial baseline vector, two double difference observation equations are formed by using the observed values of BST-1 frequency points, and the ambiguity of BSP 1 frequency points is solved to determine the position of ships. The simulation results of Beidou data show that the method has a high success rate in solving the ambiguity of BAPL frequency point, the standard deviation of heading angle is 0.16 掳and the standard deviation of pitch angle is 0.07 掳. It is an efficient and fast algorithm for ship attitude determination.
【作者单位】: 海军航空工程学院兵器科学与技术系;中国人民解放军92840部队;
【分类号】:U674.703.3

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