本文選題：偏航　切入點：R樹　出處：《測繪科學(xué)》2017年03期 　論文類型：期刊論文

【摘要】：針對衛(wèi)星導(dǎo)航系統(tǒng)中嵌入式終端常用偏航算法(歐氏距離度量法和緩沖區(qū)近似法)的局限性,提出了一種結(jié)合R樹索引和海倫公式的改進偏航算法。該算法采用R樹索引篩選法縮小目標點所在航線范圍,結(jié)合海倫公式快速計算出目標點到航線的距離,進而做出偏航判斷。理論分析和實驗結(jié)果表明,改進算法實現(xiàn)零誤差快速偏航判斷,顯著提高導(dǎo)航定位終端偏航報警的實時性和準確性,從而降低了對終端計算能力的要求,滿足了上萬個航路點的快速偏航計算要求。
[Abstract]:Aiming at the limitation of common yaw algorithms (Euclidean distance measure and buffer approximation) in satellite navigation system, An improved yaw algorithm combining R-tree index and Helen's formula is proposed, in which R-tree index filtering method is used to narrow the range of the route where the target point is located, and the distance from the target point to the route is calculated quickly with the combination of Helen's formula. The theoretical analysis and experimental results show that the improved algorithm realizes zero error fast yaw judgment and improves the real-time and accuracy of navigation and positioning terminal yaw alarm significantly, thus reducing the requirement of terminal computing ability. It meets the requirement of fast yaw calculation for thousands of route points.
【作者單位】： 公安部第一研究所;
【分類號】：P228

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1 韓雪濤;;好玩的數(shù)學(xué)——面積問題[J];科技導(dǎo)報;2008年05期

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