【摘要】：根據(jù)北斗GEO衛(wèi)星的特殊星座構(gòu)型,提出一種基于北斗降維雙差模型的艦艇快速定姿算法。根據(jù)北斗GEO衛(wèi)星的特點(diǎn),在初始定位誤差較小的情況下,忽略z軸誤差帶來的影響,建立降維雙差模型。利用B_1和B_2頻點(diǎn)形成寬巷組合,根據(jù)初始偽距值計(jì)算寬巷模糊度初始值,并解算基線向量候選值;通過模糊度函數(shù)法對候選值進(jìn)行判決,得到最優(yōu)基線向量,解出寬巷模糊度;最后以得到的最優(yōu)基線向量為初始基線向量,利用B_1頻點(diǎn)觀測值形成2個雙差觀測方程,解算B_1頻點(diǎn)模糊度,進(jìn)行艦艇定姿。利用北斗實(shí)測數(shù)據(jù)進(jìn)行仿真驗(yàn)證,結(jié)果表明該方法解算B_1頻點(diǎn)模糊度成功率高,確定的航向角標(biāo)準(zhǔn)差為0.16°,縱搖角標(biāo)準(zhǔn)差為0.07°,是一種高效快速的艦艇定姿算法。
[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 擄and the standard deviation of pitch angle is 0.07 擄. It is an efficient and fast algorithm for ship attitude determination.
【作者單位】： 海軍航空工程學(xué)院兵器科學(xué)與技術(shù)系;中國人民解放軍92840部隊(duì);
【分類號】：U674.703.3

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