Zhao Guifan

Basic Concepts on AUTOSAR Development

AUTOSAR(AUTomotiveOpen System ARchitecture) is an open and standardized automotive software architecture, jointly developed by automobile manufacturers, suppliers and tool developers. The AUTOSAR standard will serve as a platform upon which future vehicle applications will be implemented and will also serve to minimize the current barriers between functional domains. To improve cost-efficiency and reusability, AUTOSAR separates application software from the associated hardware. This stage, AUTOSAR is still in the promotion phase, and many countries are committed to its applications, including Japan and South Korea. It will widespread in automotive industry. This paper showed the basic concepts of AUTOSAR and comparisons of some confusing concepts for future in-depth study.

Research progress of switched reluctance motor drive system

With the energy shortage and environmental problems in modern society, many developed countries pay attention to the research on the electric vehicle which can realize the energy-saving. The electric machine is a key part of the electric vehicle. And the switched reluctance motor takes a lot of merits comparing to the other motor so that it becomes the preferred machine. The switched reluctance motor drive system structure is simply introduced firstly in this paper, and then the research progress of it is summarized, including the switched reluctance motor design, the control strategy, the position detection technology and the vibration and noise. At the end of the paper, some attractive topics for further research are suggested.

Communication Mechanisms on the Virtual Functional Bus of AUTOSAR

With the rapid growth of automotive electronics, the application requirements increase greatly, the hardware abounds continuously, as a result, software system becomes more and more complex. For this reason, some major OEMs found Automotive Open System Architecture (AUTOSAR), now including a large number of automotive, electronics, semiconductor and software companies. AUTOSAR’s objectives are to implement and standardize basic system functions as an industry-wide standard core solution that offers scalability to different vehicle and platform variants. AUTOSAR defines the virtual functional bus (VFB) as a means for a virtual hardware and mapping independent system integration. VFB makes the integration process of automotive software can be done in much earlier design phases. AUTOSAR also specifies two kinds of communication mechanisms to fulfill different aims. This article gives an overview of the AUTOSAR initiatives and its goals. It describes the VFB concepts, highlights the communication mechanisms.

Survey of the AUTOSAR Complex Drivers in the Field of Automotive Electronics

The Complex Device Driver is a loosely coupled container, where specific software implementations can be placed. The only requirement to the software parts is that the interface to the AUTOSAR system has to be implemented according to the AUTOSAR port and interface specifications. The purpose of the Complex Device Drivers is to fulfill the special functional and timing requirements for handling complex sensors and actuators. It is used to handle the tasks related to the strict timing. The Complex Device Drivers are to some extend intended as a migration mechanism. If interfaces for extensions are defined according to the AUTOSAR standards new extensions can be implemented according to the AUTOSAR standards, which will not force the OEM nor the supplier to reengineer all existing applications.

Research on auto and rapid exchange system of EV battery cases

In order to solve the problem of short continuous driving mileage and long charging time of electric vehicle (EV), the method of auto and rapid exchange system of EV battery cases is proposed. The exchange system deals with corresponding control of multi-components which are relatively moving each other. Based on single chip wireless transceiver nRF905 and MC68HC908GZ16, the wireless communication module is designed. The controller single chip and the wireless transceiver is connected through SPI interface. Based on this module, the wireless communication control system is developed, which is used on battery cases quick exchange of EV. The system is made up of four wireless communication modules, which are portable device, machine arm, in-vehicular module and battery-case shelves module. The remote-control, quick localization, auto release are realized using this system. The parameters are calibrated through fieldwork. The system operates stably, reliably, and met application requirements of the project, which is verified by fieldwork.

Design of BLDC Sensorless Control System for Vehicle Fuel Pump

This paper designs a kind of BLDC sensor less controll system for vehicle fuel pump. The control system uses 78F9222 of NEC as a core control unit, and uses the Back-EMF method to achieve the sensor less control for BLDC. The system can implement over-current protection, over voltage protection and over temperature protection. Loading test shows that the control system has high performance to meet the actual needs.

The ECU Control of Diesel Engine Based on CAN

The dynamic, comfort and emission performances of vehicle directly dependent on the control of engine. Engine electronic control unit (ECU) receives the signals from the sensors, and gets the current engine status. Then depending on the signals, the ECU calculates fuel injection rate, injection timing and quantity. Accordingly the actuators which are driven by ECU carry out the better fuel control. Whether the vehicle could work efficiently and reliably almost dependents on the engine ECU is normal or not. One way to test engine ECU is using load box which can diagnose and calibrate the faults. This paper chooses CAN bus to realize the communication between ECU and load box because of its widely using and well function. This paper formulates the CAN bus communication protocol which meets the needs of load box test, and designs the CAN communication module and signal input /output module. MPC5633 made by Free scale is used as the micro controller unit (MCU) in ECU. Through the experiments showed in paper proves the testing programs of ECU control can realize the function requirements.

Decoding the Engine Crank Signal Referring to AUTOSAR

As the safety of motor vehicle is taken more and more seriously, the real-time events in the automotive electronics is more important. The control of engine and power train is the core of automotive electronics, and also the domain which demand the real-time quite seriously. This paper proposes a method which can decode the engine position signal. This method is under AUTOSAR frame, based on the MPC5554 micro controller of Freesacler, and carried out by the enhanced time processor (eTPU). This method can decode the crank signal, and coordinating other modules, it can analyze the engine position signal to obtain the angular clock, fulfilling the engine control.

Method of model analysis for flexible head impacting with elastic plane

To consider the head is a flexible multi-layer structure and the contact-impact is flexible, the Hertz Contact Law is unsuitable for analyzing the dynamic response of human head impacts elastic plane with initial speed. In this paper, the process of head impacting with elastic plane is modeled as a response of vibrant system, and methods like mechanical network figure and mechanical impedance is taken to resolve this dynamic response problem. Based on the actual head structure, head is modeled as a vibrant model, which concludes the masses of scalp and bone in the impact area, the masses in the other part of the head and the brain, the stiffness of the head, and the damp coefficient of the scalp and brain. At the same time, the elastic plane is simplified as a vibrant model including mass, stiffness and damp. These two vibrant models are linked into one vibrant systematic model. In order to calculate the elastic deformation and the impact acceleration of the head, the models are transformed into mechanical girding figure at violent vibration point. The dynamic impact force of the system, the impact acceleration of the head, the elastic deformation of the plane and the fixed frequency of the system can be worked out by calculating the velocity impedance at the violent vibration point when the initial impact speed is known. The results fit the test data well, which proves that this method is available for the analysis of the dynamic response of the system under impact.

Driving performance of off-road vehicle matching with tire by simulation

The dynamic performance of the integrated system matched by the tire and the vehicle are the main factors for the driving performance of the vehicle. In order to improve the accuracy of simulation on driving performance of off-road vehicle and match correctly between the tire and the vehicle, the finite element method was used to establish model of radial tire and analysis the characteristics of tire in driving state, and the brush model of the tire are introduced contrastively. The dynamics models of the off-road vehicle which provide an off-line dynamic simulation for driving performance of the vehicle are investigated in the MATLAB/Simulink environment. The driving performance of the vehicle selected previously is investigated experimentally. There is an excellent agreement between the numerical and the experimental results.