本文關(guān)鍵詞：基于SAE J1939的客車通信協(xié)議設(shè)計與應(yīng)用，，由筆耕文化傳播整理發(fā)布。

基于SAE J1939的客車通信協(xié)議設(shè)計與應(yīng)用

基于SAE J1939的客車通信協(xié)議設(shè)計與應(yīng)用

隨著汽車能源、排放、噪聲法規(guī)的日益嚴(yán)格,以及客戶對舒適性、安全性以及娛樂性需求的進(jìn)一步提高,傳統(tǒng)的純機(jī)械裝置已經(jīng)無法滿足法規(guī)和客戶對汽車性能提出的高要求。網(wǎng)絡(luò)通信技術(shù)、計算機(jī)技術(shù)及制約技術(shù)的發(fā)展使汽車電子技術(shù)越來越多的應(yīng)用到現(xiàn)代汽車中。汽車電子技術(shù)的高速發(fā)展使汽車各電子制約系統(tǒng)采用汽車網(wǎng)絡(luò)的通信方式變得非常必要,汽車網(wǎng)絡(luò)不但可以減少電子系統(tǒng)布線的線束,降低汽車制造成本,還可以實現(xiàn)各系統(tǒng)的信息共享,使汽車更智能化、一體化,為進(jìn)一步提高整車性能,擴(kuò)展系統(tǒng)功能奠定了基礎(chǔ)。因此汽車網(wǎng)絡(luò)通信協(xié)議是汽車電子的核心技術(shù)之一,對整車網(wǎng)絡(luò)通信協(xié)議的設(shè)計是電子制約系統(tǒng)自主研發(fā)的前提和基礎(chǔ)。本文結(jié)合吉林大學(xué)與廈門金龍聯(lián)合汽車工業(yè)有限公司合作的“汽車智能化集成制約系統(tǒng)CAN通信協(xié)議的設(shè)計及其應(yīng)用”項目,針對CAN總線協(xié)議在客車通信網(wǎng)絡(luò)中的設(shè)計與應(yīng)用進(jìn)行研究,設(shè)計了應(yīng)用于客車的通信協(xié)議,開發(fā)了網(wǎng)絡(luò)通信協(xié)議淺析淺析軟件,最后分別進(jìn)行了部件檢測和裝車試驗并淺析淺析了客車通信網(wǎng)絡(luò)性能,具體工作如下：首先對汽車網(wǎng)絡(luò)協(xié)議進(jìn)行分類,從五類汽車網(wǎng)絡(luò)中選擇成本低、配置靈活的CAN總線作為客車通信網(wǎng)絡(luò)基礎(chǔ)。在淺析淺析了CAN總線的特點之后,對CAN總線高層協(xié)議SAE J1939按照OSI七層網(wǎng)絡(luò)模型逐層詳細(xì)淺析淺析,特別是數(shù)據(jù)鏈路層、應(yīng)用層、故障診斷機(jī)制以及網(wǎng)絡(luò)管理層,為客車通信協(xié)議的制定打下基礎(chǔ)。在對客車通信協(xié)議進(jìn)行設(shè)計之前,本文先淺析淺析并制定了客車各電子制約系統(tǒng)的制約對策,設(shè)計了通信網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)。之后基于SAE J1939協(xié)議設(shè)計了應(yīng)用于客車的網(wǎng)絡(luò)通信協(xié)議XMQ J1939,按照SAE J1939的原則制定了連續(xù)型和離散型客車網(wǎng)絡(luò)通信參數(shù),并設(shè)計了參數(shù)組；并且在淺析淺析了客車故障診斷的需求的基礎(chǔ)上,制定了整車故障診斷機(jī)制,設(shè)計了故障診斷協(xié)議；還設(shè)計了客車通信網(wǎng)絡(luò)兼容性機(jī)制,為每個節(jié)點ECU分配了地址,并設(shè)計了網(wǎng)絡(luò)地址仲裁方式,使網(wǎng)絡(luò)兼容性更加可靠。為了在部件檢測和裝車試驗中對CAN總線數(shù)據(jù)進(jìn)行淺析淺析,根據(jù)用戶需求,利用UML統(tǒng)一建模語言對系統(tǒng)建模,選擇Visual C++開發(fā)環(huán)境,設(shè)計了基于SAE J1939協(xié)議淺析淺析軟件。最后分別進(jìn)行了部件檢測和裝車試驗。對部件制約系統(tǒng)檢測,首先設(shè)計了檢測流程,檢測了制約系統(tǒng)通信數(shù)據(jù)結(jié)構(gòu)以及消息反饋內(nèi)容,并檢測了故障反饋內(nèi)容和兼容性機(jī)制,確保各部件制約系統(tǒng)能夠滿足客車通信協(xié)議的要求,能夠進(jìn)行裝車試驗。在裝車試驗中,分別進(jìn)行了靜態(tài)試驗和動態(tài)試驗。對裝車后的各制約系統(tǒng)除了檢測部件檢測的內(nèi)容外還進(jìn)行了電子制約單碩博在線論文網(wǎng)互換測試,驗證相同功能的系統(tǒng)不需要修改軟硬件就可以穩(wěn)定的實現(xiàn)功能。還對整車試驗數(shù)據(jù)進(jìn)行淺析淺析,證明了總線負(fù)載率、命令報文發(fā)送延遲率和設(shè)備響應(yīng)延遲時間都在正常范圍內(nèi),客車通信網(wǎng)絡(luò)性能良好。本文設(shè)計的客車通信協(xié)議,有利于整車企業(yè)制約成本,同時也有利于推動國內(nèi)汽車電子企業(yè)的技術(shù)進(jìn)步,更為未來客車CAN總線功能擴(kuò)展打下了良好基礎(chǔ)。

【Abstract】 As the vehicle’s energy, emissions, noise regulations become increasingly stringent, and customers’needs for comfort, security and entertainment are further improved, traditional purely mechanical devices have been unable to meet the regulations’and customers’demands for automobile high performance. The developments of network communication, computer and control technology make more and more automobile electronic technologies to be applied to modern automobile. The rapid developments of automobile electronic technology make the communication mode of vehicle network which every electronic control system in the automobile uses become very necessary. Vehicle network not only can reduce wiring harness of electronic systems and automobile’s manufacturing cost, but also can achieve every system information sharing, make automobile more intelligent and integrated, form the basis for further improving vehicle performance and expanding system function. Therefore the protocol of vehicle network communication is one of the core technologies of Automotive Electronics. The design of vehicle network communication protocol is the prerequisite and basis for independent research and development of electronic control system.This paper combined with "Automotive Smart & Integrated Control System CAN communication protocol design and application" project which Jilin University cooperate with Xiamen King Long United Automotive Industry Co Ltd, researches the CAN bus protocol’s design and application on bus communication networks, designs the communication protocol used in passenger cars, develops the software that can analyze network communication protocol. Finally, tests components and carries out vehicle test, analyses the bus communication network’s performance. As the specific works: Firstly, sorts vehicle network protocols, and chooses the low-cost and flexibly configurable CAN bus from five sorts of vehicle network as the base of bus communication network. After analyzing the features of CAN bus, analyses the high-level CAN protocol SAE J1939 according to OSI seven layers network model in detail, especially Data Link Layer, Application Layer, Diagnostic Mechanism and Network Management Protocol. These works form the basis for formulating the bus communication protocol.Before designs bus communication protocol, this paper analyses and formulates the control strategy of bus electronic control system, designs the communication network topology. Then designs the bus network communication protocol XMQ J1939 that based on SAE J1939. Defines continuous and discrete parameters for bus network communication, designs the parameters group according to the principles of SAE J1939. Based on bus fault diagnosis demands, formulates fault diagnosis mechanism and designs diagnostic protocol. Also designs bus communication network’s compatibility mechanism, allocates network address to each node’s ECU. And the way of network address arbitration is designed to make the network more reliable. In order to analyze the data on CAN bus when does components and vehicle test, according to users’needs, builds the system architecture model with Unified Modeling Language UML, selects Visual C++ development environment to design the protocol that based on the SAE J1939 analysis software.At last, carries out components test and vehicle test. For testing control system components, designs the testing process, detects communication data frame of the control system and the contents of return message include of fault diagnosis message, exams the compatibility mechanism to ensure that all parts of the control system can meet the requirements of bus communication protocol, and can carry out vehicle test. In the vehicle test, there are static tests and dynamic tests. For all of control system components that fitted on the bus, besides the contents in the components test, also carries out the electronic control unit exchanging test, that can verify the control systems which have same functions can work stably without modifying the software or hardware. The analysis of vehicle test data proves that the load rate of CAN bus, the rate of order message transmission delay and equipment response delay time are in the normal range, the bus communication network have good performance.The bus communication protocol designed in this paper will help vehicle enterprises control manufacturing cost, and home automotive electronics corporation improve technology, in the mean time, lays a good foundation for CAN bus function expansion in the future.

更多論文推薦: 各專業(yè)論文 海量論文下載

  本文關(guān)鍵詞：基于SAE J1939的客車通信協(xié)議設(shè)計與應(yīng)用，由筆耕文化傳播整理發(fā)布。