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Research on Communication of Canbased Vehicle Body Control System

Author: LuLei
Tutor: ZuoWeiMing
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: BCS Communication CAN SAE J1939
CLC: TP273
Type: Master's thesis
Year: 2009
Downloads: 187
Quote: 3
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Abstract


BCS(Body Control System) is used to control the distributed and diversified ECU(Electronic Control Unit) on the body of vehicle. With the rapid growth of electronic devices on vehicle and the progress of fieldbus technique, the traditional wiring distributed control mode is substituted by intergrated intelligent control mode using fieldbus. With prominent realtime, reliability and flexibility, CAN is the most wildly used bus among vehicle network. The appllication of CAN in vehicle BCS can simplify the wiring, improve the reliability and realize the information sharing among all parts of vehicle. In this paper an universal CAN BCS is researched and disigned. The system structure is provided, and the hardware communication platform is built. A communication protocol based on SAE J1939 is established, and the software is realized, which meets the demand of communication in BCS.By comparing with the existing BCS, a masterslave, modularized, and universal BCS is designed, and its hardware structure and CAN communiction interface circuit is provided. In order to realize the CAN communication between PC and master/slave module, a USB-CAN interface card based on ARM7 chip LPC2368 is developed. Its hardware circuit and software development process is provided, and the WDM driver of this card is developed using DriverStudio. To be compatible with other vehicle bus network, the SAE J1939 protocol is deeply analyzed. Combined with the actual communication needs of BCS, a CAN BCS application layer protocol based on J1939 is established, which achieves convenient implementation, high efficiency and flexible extensible performance. According to the communication protocol, the communication software for master module and slave module are developed, and the process of each subroutine is given. The PC communication and configuration software is developed based on VC++ 6.0. Finally, a debug environment is built, and experiments are taked to examine the communication function of BCS. The experimental results show that the designed CAN BCS meets the communication needs.Compared with the traditional vehicle BCS, this system has excellent universality and outstanding performance and reliability. It can change its function through simple software configuration under the premise of not changing hardware circuit, which makes it applicable for various vehicle models. This paper has strong guidable significance to the popularization and application of bus technology in domestic automobile electronic fields.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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