Study On Vehicle Controller Of Electric Bus Based On TTC200

With the reduction of oil and the increasing pollution, low consumption new energyvehicles are becoming the dominant direction of the automotive industry research. As oneof the branch of PEV, there are good prospects for development of pure electric bus.Forexample,it has good performances in the Shanghai World Expo,large sports meeting aswell as urban bus.As the core component of vehicle controlling,the main functions of the VCU isdriving torque, doing the optimal control of baking energy, achieving the energymanagement,making and maintaining the CAN network, doing the diagnosis and treatmentof faults,monitoring the vehicle status.Specifically,key responsibilities is distinguishingthe intent of drivers,gathering the signals of the door keys and sensors.By identifying thedriving mode,the VCU may schedule the corresponding control strategies.While, itcompletes the appropriate control and peripheral equipments, such as water pumps, oilpumps, cooling fans,air pumps and other components. But for now, there is not yet amature market can be put into a pure electric vehicle controller technology, the majordomestic auto companies and universities also learn some advanced technology in Japan,the United States and other countries, on the basis of hybrid cars research on deepening.I have designed a vehicle controller met the customer demands for a typical pureelectric bus based on rapid prototyping platform TTC200in my paper. The main contentsare as follows:(1)Make the overall plan for the vehicle controller, first of all, to analyze the wholeperformance requirements, to define8controllers for the bus and to determine the vehicleelectric architecture. Based on the structure, considering the vehicle controller determinesmake sure of the TTC200rapid prototyping hardware selection, and complete its pinfunction definitions.Then according to V-shaped pattern of development, to determine theVCU software design based on TTC200.(2)For pure electric bus vehicle controller, make the vehicle dynamic CAN networkprotocol in accordance with the requirements of J1939protocols. (3)The vehicle functional tasks have been divided into three parts, respectively, signalacquisition and receiving CAN communication tasks; after signal recognition analysis,given the amount of control signals control; sending controlled variables to the appropriatesub-controller via CAN bus and realizing the functions.Then to develop appropriatecontrol strategies and implement the scheduling of vehicle control strategy aiming atdifferent operating modes (the self-check mode, charge mode, drive mode, failure mode,ON mode, Off mode).(4)After completing the vehicle controller design and CAN network protocol,conduct the MIL and SIL simulation with the support of Targetlink software provided bydSPACE. Verify the correctness of the model and the correctness of C codes aftercalibrating the previous models.