Design And Implementation Of In-Vehicle Network Management System For An Electric Vehicle

At present, the cost of the automotive electronics as well as electronic technology-related products has risen to about 25% of vehicle cost, and the high-grade cars accounted for more than 30% of the total cost. In the mean time, vehicles equipped with multiple energy systems increased from 0.5% in 1998 to 4% in 2009. Electronics and multiple energy technology become the main driving force of innovation. The constant increasing of Electronic Control Units (ECUs) leads to huge complexity in automotive networks. As the complexity of automotive networks systems increased, network management mechanisms become more important. Thus, this thesis discusses the design of multi-energy electric vehicle network platform and embedded automotive OSEK network management (NM) system using Controller Area Network (CAN) protocol for verification.This thesis mainly focuses on a multi-energy electric automobile, whose energy includes electronic energy provided both by battery and solar energy. The in-vehicle network platform is designed. The hardware topology of this network is proposed and the performance of the network is evaluated. Also, the flexibility of this network is thoroughly investigated and computed.This thsis designs an in-vehicle direct NM system according to the basic API provided by OSEK/VDX NM standard. The NM system implements logic ring communication mechanisms and complex state transitions using Finite State Machine (FSM). Software development is based on Freescale's embedded MPC5554 platform. This software has a good portability which can transplant into any 8-bit or 16-bit Microcontrollers of Freescale under the condition of CAN driver support. In addition, the thesisconsiders the implementation of configuration tool which is designed by Java open-source Integrated Development Environment (IDE) Eclipse with SWT components. The configuration tool can automatically generate configuration codes. The simulation system is built based on CANoe7.1. There are two simulated nodes and a real node in the network simulation system. Experimental results show that the logical ring runs stable and the three network nodes can transit into the bus sleep mode simultaneously.The NM system software in accordance with OSEK direct network management can ganrantee security and reliablity of networkcommunication. Besides, the sychronized sleeping mechanism can reduce power consumption of ECUs effictively. Also, this NM software is independent with operation system, thus can effectively reduce costs of NM software, and enlarge the application of NM software. Also, this NM software in independent with operation system, thus can effectively reduce costs of NM software, and enlarge the application of NM software.