發(fā)布時間：2018-06-10 14:37

  本文選題：總線監(jiān)控 + 時鐘同步�。� 參考：《南京航空航天大學》2012年碩士論文

【摘要】：總線監(jiān)控技術(shù)的研究對于、航空電子綜合系統(tǒng)、總線傳輸技術(shù)、總線故障診斷、飛行器安全性保障、多飛行器協(xié)同工作等多方面的研究具有重要的意義。要實現(xiàn)及時處理隨時變化的飛行數(shù)據(jù)和目標數(shù)據(jù)信息，實現(xiàn)各航電設備最大化利用自身功能并做到資源共享，使得綜合航電系統(tǒng)能夠可靠并高效的工作，需要使用穩(wěn)定高速的機載數(shù)據(jù)總線技術(shù)。然而，現(xiàn)有的總線監(jiān)控系統(tǒng)只能針對單種固定的機載總線進行監(jiān)控，并沒有考慮總線監(jiān)控領(lǐng)域諸如多總線的時鐘同步、監(jiān)控軟件的開放性和分布性、總線通信數(shù)據(jù)與GIS的結(jié)合等更多的技術(shù)要求。 本文針對總線監(jiān)控技術(shù)展開了深入研究，首先針對總線監(jiān)控系統(tǒng)要求各總線設備高度時間同步的問題，在分析了國內(nèi)外已有同步算法的基礎上設計了基于TSC和NTP的高精度軟時鐘服務模塊，提出了時鐘同步算法CSA-RTMS，并進行了誤差分析，且通過實驗測試了算法的同步精度；其次，研究了傳統(tǒng)的總線數(shù)據(jù)采集模型，分析了存在的問題，針對異種總線監(jiān)控的問題提出了基于主從式控制的多線程并行采集模型，通過對模型的分析以及不同性能指標的對比論證了該模型的優(yōu)點，并實現(xiàn)了該模型；再次，分析了接口控制文檔的重要性，針對多總線ICD軟件難以開發(fā)和維護的問題，，設計了基于XML的用戶易操作接口控制文檔，并完成了從文件到XML文檔的自動轉(zhuǎn)換，實現(xiàn)了基于該文檔的通用總線數(shù)據(jù)解析機制，這是本項目的難點；針對總線監(jiān)控系統(tǒng)對二維態(tài)勢顯示的需求，分析比較了當前流行的地理信息系統(tǒng)，選擇了MapX作為態(tài)勢顯示的支撐技術(shù)，設計并實現(xiàn)了二維態(tài)勢顯示功能模塊；最后，基于以上研究工作，采用系統(tǒng)工程的方法和組件化技術(shù)設計并實現(xiàn)了基于仿真平臺的多總線實時監(jiān)控系統(tǒng)軟件，對二維態(tài)勢顯示、實時曲線繪制、以及數(shù)據(jù)緩沖機制進行了優(yōu)化。本文實現(xiàn)的基于仿真平臺的多總線實時監(jiān)控系統(tǒng)完全可以滿足項目功能和性能需求。 論文的新穎之處是針對多總線實時監(jiān)控軟件提出的高精度時鐘同步算法CSA-RTMS，該算法在仿真系統(tǒng)內(nèi)提高了時鐘同步精度；結(jié)合單總線監(jiān)控技術(shù)，探索多總線監(jiān)控過程中的數(shù)據(jù)采集模型、數(shù)據(jù)解析處理機制以及軟件設計的方法，提高了多總線監(jiān)控的實時性；將組件化地理信息系統(tǒng)引入多總線監(jiān)控系統(tǒng)，以圖形化動態(tài)顯示多總線實時內(nèi)容，并就相關(guān)性能問題進行了優(yōu)化，增強了監(jiān)控系統(tǒng)的實用性。
[Abstract]:The research of bus monitoring technology is of great significance to the research of avionics integrated system, bus transmission technology, bus fault diagnosis, vehicle safety guarantee, multi-vehicle cooperative work and so on. In order to achieve timely processing of flight data and target data information, to maximize the use of their own functions and to share resources, the integrated avionics system can work reliably and efficiently. Stable high-speed airborne data bus technology is needed. However, the existing bus monitoring system can only monitor a single fixed airborne bus, and does not consider the bus monitoring field such as clock synchronization of multi-bus, the openness and distribution of monitoring software. More technical requirements such as the combination of bus communication data and GIS are discussed in this paper. Firstly, the bus monitoring system requires high time synchronization of each bus device. On the basis of analyzing the existing synchronization algorithms at home and abroad, the high precision soft clock service module based on TSC and NTP is designed, and the clock synchronization algorithm CSA-RTMSis is proposed, and the error analysis is carried out, and the synchronization accuracy of the algorithm is tested by experiments. This paper studies the traditional bus data acquisition model, analyzes the existing problems, and puts forward a multi-thread parallel acquisition model based on master-slave control for the problem of heterogeneous bus monitoring. Through the analysis of the model and the comparison of different performance indexes, the advantages of the model are demonstrated, and the model is realized. Thirdly, the importance of interface control document is analyzed, and the problem that the multi-bus ICD software is difficult to develop and maintain is analyzed. The user interface control document based on XML is designed, and the automatic conversion from file to XML document is completed, and the universal bus data parsing mechanism based on XML document is realized, which is the difficulty of this project. According to the demand of the bus monitoring system for two-dimensional situation display, this paper analyzes and compares the current popular geographic information system, selects MapX as the supporting technology of situation display, designs and implements the two-dimensional situation display function module. Based on the above research work, the software of multi-bus real-time monitoring system based on simulation platform is designed and realized by adopting the method of system engineering and component-based technology. And the data buffering mechanism is optimized. The multi-bus real-time monitoring system based on simulation platform in this paper can completely meet the function and performance requirements of the project. The novelty of this paper is the high-precision clock synchronization algorithm CSA-RTMS proposed for multi-bus real-time monitoring software. The algorithm improves the precision of clock synchronization in the simulation system. Combining with the technology of single bus monitoring, this paper explores the data acquisition model, the mechanism of data analysis and processing and the method of software design in the process of multi-bus monitoring, which improves the real-time performance of multi-bus monitoring. The component GIS is introduced into the multi-bus monitoring system, the real-time content of the multi-bus is displayed dynamically and graphically, and the related performance problems are optimized to enhance the practicability of the monitoring system.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TP336

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