本文選題：GNSS多系統(tǒng)融合 + 短基線�。� 參考：《安徽理工大學》2016年碩士論文

【摘要】：隨著GNSS技術(shù)的發(fā)展,特別是我國北斗衛(wèi)星導航系統(tǒng)的第二步計劃的完成,多頻多系統(tǒng)GNSS融合應(yīng)用將成為GNSS導航定位主要發(fā)展趨勢之一；目前具備獨立服務(wù)能力的系統(tǒng)包括GPS、GLONASS和BDS；多系統(tǒng)融合,能極大地改善冗余度,改善定位精度,提高定位的穩(wěn)定性,改善導航質(zhì)量。本文主要研究工作：1)在研究GNSS多系統(tǒng)融合的時間系統(tǒng)與坐標系統(tǒng)統(tǒng)一理論與GNSS衛(wèi)星坐標計算方法的基礎(chǔ)上提出了多系統(tǒng)融合的主體方案。2)研究并建立了GNSS多系統(tǒng)融合基本模型：基于非差與雙差的數(shù)學模型,基于高度角模型、信噪比模型與驗后方差估計模型的隨機模型,對流層、電離層等誤差修改模型。3)研究并實現(xiàn)了GNSS多系統(tǒng)融合短基線解算關(guān)鍵技術(shù)：周跳探測技術(shù),基于序貫平差與卡爾曼濾波的浮點解計算技術(shù),LAMBDA算法固定模糊度技術(shù)。最后利用文中的算法開發(fā)出了一套BDS/GPS/GLONASS系統(tǒng)融合的短基線解算處理軟件,并通過實驗短基線數(shù)據(jù),重點分析對比了BDS/GPS/GLONASS單系統(tǒng)、雙系統(tǒng)以及三系統(tǒng)融合共7種模式下偽距單點、偽距雙差和載波雙差的定位性能,得出在短基線解算方面雙系統(tǒng)定位精度與穩(wěn)定性優(yōu)于單系統(tǒng),都能達到厘米級定位精度,三系統(tǒng)優(yōu)于雙系統(tǒng)的結(jié)論,從而驗證了本軟件的正確性和實用性。
[Abstract]:With the development of GNSS technology, especially the completion of the second step plan of Beidou satellite navigation system in China, the application of multi-frequency and multi-system GNSS fusion will become one of the main developing trends of GNSS navigation and positioning. At present, the independent service systems include GPS-GLONASS and BDS.Multi-system fusion can greatly improve redundancy, positioning accuracy, positioning stability and navigation quality. On the basis of studying the unified theory of time system and coordinate system of GNSS multisystem fusion and the calculation method of GNSS satellite coordinate, this paper puts forward the main project of multi-system fusion. 2) and establishes the GNSS multi-system. Fusion of basic models: mathematical models based on non-difference and double-difference, Based on height angle model, signal-to-noise ratio model and posteriori variance estimation model, tropospheric and ionospheric error modification model. Floating-point solution based on Sequential Adjustment and Kalman filter A fixed ambiguity algorithm based on Lambda algorithm is presented. Finally, a short baseline solution software for BDS/GPS/GLONASS system fusion is developed by using the algorithm in this paper, and the pseudo-range single point in BDS/GPS/GLONASS single system, double system and three system fusion mode is analyzed and compared through the experimental short baseline data. The positioning performance of pseudo-range double difference and carrier double difference shows that the positioning accuracy and stability of the two systems are better than that of the single system in short baseline solution, and the positioning accuracy of the three systems is better than that of the double system, and the positioning accuracy of the three systems is better than that of the two systems. The correctness and practicability of the software are verified.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：P228.4

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