本文選題：GNSS　切入點(diǎn)：完好性　出處：《沈陽航空航天大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著GPS等全球衛(wèi)星導(dǎo)航系統(tǒng)的發(fā)展,一些區(qū)域?qū)Ш胶驮鰪?qiáng)系統(tǒng)也在飛速發(fā)展。導(dǎo)航系統(tǒng)的不斷發(fā)展帶動了用戶對其性能的關(guān)注,使得導(dǎo)航系統(tǒng)的性能優(yōu)劣已經(jīng)成為GNSS應(yīng)用領(lǐng)域內(nèi)各衛(wèi)星導(dǎo)航系統(tǒng)競爭的關(guān)鍵。本文對GPS和BDS的空間信號(SIS)性能進(jìn)行評估。首先針對目前精度評估模型存在的計(jì)算量大、評估條件受限等缺點(diǎn),提出了分段式SIS用戶測距誤差(URE)評估模型和基于Allan方差法的SIS用戶測速誤差(URRE)、用戶測加速度誤差(URAE)評估模型,并利用廣播星歷和精密星歷評估了GPS和BDS的SIS精度性能。在此基礎(chǔ)上利用Q-Q圖對GPS SIS URE的正態(tài)分布特性進(jìn)行了擬合,驗(yàn)證了GPS SIS完好性評估的前提,并基于瞬時SIS URE的實(shí)測結(jié)果對GPS SIS URE的完好性進(jìn)行了評估。其次,基于可靠性原理建立了SIS連續(xù)性評估模型,利用平均故障時間間隔(MTBF)表征了系統(tǒng)在單位時間內(nèi)不發(fā)生連續(xù)性損失的概率。此外,針對目前可用性評估模型的不全面性,本文建立了一種基于馬爾科夫過程的單星可用性評估模型,并在此基礎(chǔ)上提出一種同時考慮衛(wèi)星的故障率、修復(fù)率和備份情況的星座可用性評估模型。通過對實(shí)測數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析,分別計(jì)算了GPS和BDS的連續(xù)性和可用性概率。本文基于實(shí)測數(shù)據(jù)和提出的評估模型,分別對GPS和BDS的精度、完好性、連續(xù)性和可用性進(jìn)行了評估,評估結(jié)果驗(yàn)證了本文所提出的評估模型的有效性和兩個系統(tǒng)的性能對其各自的SIS性能指標(biāo)的符合性。同時,本文對衛(wèi)星導(dǎo)航系統(tǒng)性能評估方法的研究對我國BDS的全球化建設(shè)和后續(xù)發(fā)展有十分重要的意義。
[Abstract]:With the development of GPS and other global satellite navigation systems, some regional navigation and enhancement systems are also developing rapidly. The performance of navigation system has become the key to the competition of satellite navigation system in the field of GNSS application. In this paper, the spatial signal of GPS and BDS is evaluated. This paper presents a segmented SIS user ranging error evaluation model and a SIS user speed measurement error evaluation model based on Allan variance method. The SIS accuracy performance of GPS and BDS is evaluated by using broadcast ephemeris and precise ephemeris. On the basis of this, the normal distribution characteristics of GPS SIS URE are fitted by Q-Q diagram, and the premise of GPS SIS integrity evaluation is verified. The integrity of GPS SIS URE is evaluated based on the measured results of instantaneous SIS URE. Secondly, the SIS continuity evaluation model is established based on the reliability principle. The probability of no continuity loss per unit time is characterized by the mean time interval MTBF. In addition, in view of the incompleteness of the current usability evaluation model, In this paper, a single satellite availability evaluation model based on Markov process is established, and a failure rate considering satellite is proposed. Based on the statistical analysis of the measured data, the continuity and availability probability of GPS and BDS are calculated. Based on the measured data and the proposed evaluation model, the continuity and availability probability of the constellation are calculated. The accuracy, completeness, continuity and availability of GPS and BDS are evaluated respectively. The evaluation results verify the validity of the proposed evaluation model and the conformity of the performance of the two systems to their respective SIS performance indexes. In this paper, the research on the performance evaluation method of satellite navigation system is of great significance to the global construction and subsequent development of BDS in China.
【學(xué)位授予單位】：沈陽航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN967.1

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本文編號：1557837