【摘要】：本文依托于城軌列車傳感器網(wǎng)絡接入節(jié)點、復合節(jié)點與測試評估平臺項目(國家863計劃),對城軌列車傳感器網(wǎng)絡平臺的建設進行了設計研究。國內(nèi)的城市軌道列車上采用的列車控制技術多從國外引進,缺少自己的知識產(chǎn)權(quán)。尤其是目前沒有獨立的、大容量的、成套的列車運行安全狀態(tài)實時感知系統(tǒng),為列車的安全、可靠、準時運行提供保證,因此針對我國城市軌道運行安全特性,建立一套標準化、系統(tǒng)化的城軌列車傳感器網(wǎng)絡意義重大。 首先,對傳感器網(wǎng)絡功能結(jié)構(gòu)、網(wǎng)絡結(jié)構(gòu)、傳感器數(shù)據(jù)的傳輸進行分析,提出了傳感器網(wǎng)絡中存在的技術問題。還指出了影響網(wǎng)絡通信實時性的主要因素,在建立城軌傳感器網(wǎng)絡應主要解決網(wǎng)絡關鍵節(jié)點調(diào)度策略問題,以滿足平臺實時性的要求。 其次,設計一個城軌列車傳感器網(wǎng)絡數(shù)據(jù)傳輸平臺,此平臺可仿真實際運行的網(wǎng)絡和系統(tǒng)。在平臺中引入工業(yè)以太網(wǎng)通信技術。從傳感器網(wǎng)絡的功能需求角度出發(fā),設計網(wǎng)絡中的功能節(jié)點；從網(wǎng)絡可靠性角度出發(fā)設計網(wǎng)絡功能節(jié)點的組網(wǎng)方式,建立一個由數(shù)據(jù)采集層、數(shù)據(jù)接入層、數(shù)據(jù)傳輸層以及數(shù)據(jù)處理層組成的四層網(wǎng)絡結(jié)構(gòu)；根據(jù)功能節(jié)點的功能定義選擇設備,搭建物理平臺；設計數(shù)據(jù)傳輸模擬系統(tǒng),實現(xiàn)平臺的數(shù)據(jù)傳輸功能。 再次,分析在城軌列車傳感器網(wǎng)絡數(shù)據(jù)傳輸平臺中,影響網(wǎng)絡通信延遲的主要因素,得出排隊延遲的影響最大。為了降低數(shù)據(jù)的排隊延遲,在IEEE802.1P標準幀結(jié)構(gòu)中引入截止期限字段,并在網(wǎng)絡關鍵節(jié)點處設計了優(yōu)先級隊列下FCFS與EDF相結(jié)合的調(diào)度策略。利用opnet仿真技術驗證改進調(diào)度策略的有效性。 最后,對城軌列車傳感器網(wǎng)絡中的延遲模型做了改進,利用改進的延遲模型評價平臺的傳輸實時性能。網(wǎng)絡演算算法中的服務曲線根據(jù)聯(lián)合調(diào)度策略的工作原理進行定義。計算城軌列車傳感器網(wǎng)絡數(shù)據(jù)傳輸平臺端對端傳輸?shù)木W(wǎng)絡時延,分析結(jié)果得出網(wǎng)絡時延小于數(shù)據(jù)的發(fā)送周期。由此可見,數(shù)據(jù)傳輸平臺實時性能可以得到保證。
[Abstract]:Based on the access node of urban rail train sensor network, composite node and test and evaluation platform project (National 863 Plan), the construction of urban rail train sensor network platform is designed and studied in this paper. Most of the train control technologies used in domestic urban rail trains are introduced from abroad and lack of their own intellectual property rights. Especially at present, there is no independent, large capacity, complete set of train operation safety real-time sensing system, which provides a guarantee for the safety, reliability and punctual operation of the train, so in view of the safety characteristics of urban rail operation in our country, It is of great significance to establish a set of standardized and systematic urban rail train sensor networks. Firstly, the function structure, network structure and sensor data transmission of sensor network are analyzed, and the technical problems existing in sensor network are put forward. The main factors affecting the real-time performance of network communication are also pointed out. In order to meet the real-time requirements of the platform, the key node scheduling strategy of the network should be solved in the establishment of urban rail sensor network. Secondly, a data transmission platform of urban rail train sensor network is designed, which can simulate the actual running network and system. Industrial Ethernet communication technology is introduced into the platform. From the point of view of the functional requirements of sensor networks, the functional nodes in the network are designed. From the point of view of network reliability, the networking mode of network function nodes is designed, and a four-layer network structure composed of data acquisition layer, data access layer, data transmission layer and data processing layer is established. According to the function definition of the function node, the equipment is selected, the physical platform is built, and the data transmission simulation system is designed to realize the data transmission function of the platform. Thirdly, the main factors that affect the network communication delay in the data transmission platform of urban rail train sensor network are analyzed, and it is concluded that the queuing delay has the greatest influence. In order to reduce the queuing delay of data, the deadline field is introduced into the IEEE802.1P standard frame structure, and the scheduling strategy of combining FCFS and EDF under priority queue is designed at the key nodes of the network. Opnet simulation technology is used to verify the effectiveness of the improved scheduling strategy. Finally, the delay model in urban rail train sensor network is improved, and the improved delay model is used to evaluate the transmission real-time performance of the platform. The service curve in the network calculus algorithm is defined according to the working principle of the joint scheduling strategy. The network delay of end-to-end transmission of urban rail train sensor network data transmission platform is calculated, and the analysis results show that the network delay is less than the transmission period of the data. Thus it can be seen that the real-time performance of the data transmission platform can be guaranteed.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U270.38

【參考文獻】

相關期刊論文 前10條

1 王俊景;;列車通信網(wǎng)絡簡介[J];城市軌道交通研究;2005年06期

2 張其梅;;計算機網(wǎng)絡拓撲結(jié)構(gòu)的選擇[J];信息通信;2012年01期

3 彭明;馬金忠;;仿真技術在網(wǎng)絡模擬中的實現(xiàn)方式[J];信息技術;2008年06期

4 陳磊,馮冬芹,金建祥,褚健;以太網(wǎng)在工業(yè)應用中的實時能力分析[J];化工自動化及儀表;2003年01期

5 路向陽;列車通信網(wǎng)絡的發(fā)展與應用綜述[J];機車電傳動;2002年01期

6 沈卓煒;汪蕓;;基于EDF調(diào)度策略的端到端實時系統(tǒng)可調(diào)度性分析算法[J];計算機研究與發(fā)展;2006年05期

7 郭麗娟;劉雙與;張激;;基于時間觸發(fā)的高可靠性實時系統(tǒng)架構(gòu)[J];計算機工程;2006年04期

8 尹德斌;謝劍英;;一種新的加權(quán)公平隊列調(diào)度算法[J];計算機工程;2008年04期

9 康曉鳳;孫彥景;;面向煤礦工業(yè)以太網(wǎng)的混合調(diào)度方法仿真研究[J];計算機仿真;2011年08期

10 張奇智,張彬,張衛(wèi)東;基于網(wǎng)絡演算計算交換式工業(yè)以太網(wǎng)中的最大時延[J];控制與決策;2005年01期

相關博士學位論文 前1條

1 聶曉波;列車控制網(wǎng)絡實時性能分析及調(diào)度策略研究[D];北京交通大學;2011年

，

本文編號：2494504