Kyung-Jung Lee

Implementation of a ZigBee-based high performance sensor node for the robot environment platform

In this paper, a ZigBee-based wireless sensor network is configured for the robot to effectively communicate with the environment platform where each sensor node is implemented using a high performance microcontroller. The localization and the navigation functions are also required for the robot and the functions are executed with various types of sensor information. A new type of ZigBee stack is developed using the RUM(Router Under MAC) of the Atmel Corp. and it is applied to 32-bit ARM core microcontroller for the high performance sensor data manipulation and transmission. It is verified by experiments that the wireless sensor network consisting of developed high performance sensor nodes can be effectively used for the robot environment platform.

Design and Development of a Functional Safety Compliant Electric Power Steering System

ISO 26262 is an international standard for the functional safety of electric and electronic systems in vehicles, and this standard has become a major issue in the automotive industry. In this paper, a functional safety compliant electronic control unit (ECU) for an electric power steering (EPS) system and a demonstration purposed EPS system are developed, and a software and hardware structure for a safety critical system is presented. EPS is the most recently introduced power steering technology for vehicles, and it can improve driver’s convenience and fuel efficiency. In conformity with the design process specified in ISO 26262, the Automotive Safety Integrity Level (ASIL) of an EPS system is evaluated, and hardware and software are designed based on an asymmetric dual processing unit architecture and an external watchdog. The developed EPS system effectively demonstrates the fault detection and diagnostic functions of a functional safety compliant ECU as well as the basic EPS functions.

Development of a Smart Grid Monitoring System with Anti-Islanding Function for Electric Vehicle Charging

In this paper, we present a smart grid monitoring system connected with electric vehicle charging system using anti-islanding method. Electric vehicles can be charged through remote control of smart grid monitoring system and the charging process may be more stable and more efficient by virtue of wireless communication between the Local Area Module and End Modules. It is illustrated by some experiments that electric vehicle charging process continued without any serious fault even though the islanding phenomena occurred in the grid if the presented monitoring system was applied to the smart grid system.

Development of software component architecture for motor-driven power steering control system using AUTOSAR methodology

This paper describes the development of the software component (SW-C) architecture for a motor-driven power steering (MDPS) control system using the automotive open system architecture (AUTOSAR) methodology. The MDPS control system is a new power steering technology that replaces the hydraulic actuator system with the electric actuator system. As soon as the driver turns the steering wheel, the MDPS control system generates assistant torque to enhance the drivers convenience and fuel efficiency. AUTOSAR is a common platform for the implementation of automotive embedded software. Some aspects of safety and timing requirements are analyzed. The AUTOSAR methodology improves flexibility, reusability, and maintenance of automotive embedded software. Therefore, we design the SW-C architecture for an MDPS control system using an AUTOSAR SW-C authoring tool. In addition, we implement and validate the MDPS control model based on the designed SW-C architecture using MATLAB/Simulink.

Reliability Improvement of In-Vehicle Networks by Using Wireless Communication Network and Application to ESC Systems

In this paper, we propose an alternative method of communication to improve the reliability of in-vehicle networks by jointly using wireless communication networks. Wired Communication networks have been used in vehicles for the monitoring and the control of vehicle motion, however, the disconnection of wires or hardware fault of networks may cause a critical problem in vehicles. If the network manager detects a disconnection or faults in wired in-vehicle network like the Controller Area Network(CAN), it can redirect the communication path from the wired to the wireless communication like the Zigbee network. To show the validity and the effectiveness of the proposed in-vehicle network architecture, we implement the Electronic Stability Control(ESC) system as ECU-In-the-Loop Simulation(EILS) and verify that the control performance can be kept well even if some hardware faults like disconnection of wires occur.

Controller Scheduling and Performance Analysis for Multi-Motor Control

In this paper, we propose a scheduling method for signal measurement and control algorithm execution in a multi-motor drive controller. The multi-motor controller which is used for vehicle control receives position/velocity command and performs position/velocity control and current control. Internal resource allocation and control algorithm execution timing are very important when one microcontroller is used for multi-motor drives. The control performance of the velocity control system is verified by varying ADC(Analog to Digital Converter) conversion timing and algorithm execution timing using real experiments.

Design of a Reliable In-Vehicle Network Using ZigBee Communication

This paper presents a new configuration for in-vehicle networks to increase the reliability of the communication between electronic control units (ECU) and to improve the safety level of a vehicle. Basically, the CAN (Controller Area Network) protocol is assumed for the data communication in vehicles but more reliable communication can be guaranteed by adding the ZigBee communication function to each ECU. To show the validity and the performance of the presented network configuration for some network faults, the Electronic Stability Control (ESC) operation is analyzed by using an ECU-In-the-Loop Simulation (EILS). The experimental set-up for EILS of ESC system consists of two 32-bit microcontroller boards which can be communicated with the CAN or the ZigBee protocol. A 7-DOF (Degrees Of Freedom) vehicle model and ESC algorithm is implemented on each microcontroller. It is shown by the experimental results that ESC using the high reliability CAN system can achieve the same performance as using only CAN protocol without disconnected CAN bus.

Electric Vehicle Charging Control System using a Smartphone Application Based on WiFi Communication

In this paper, we propose a smartphone application based on a wireless fidelity(WiFi) in order to control the charging of electric vehicle(EV) and monitor the charging status together with the vehicle history information. The driver obtains much information on vehicle status through a smartphone application which communicates with the electric vehicle supply equipment(EVSE) management server while the EV also communicates with the EVSE for the authentification through controller area network(CAN). We also implement the simulator for the EV charging control system to verify the functions of the proposed application where the simulator consists of an EV model, an EVSE, and a smartphone. It is shown by the simulator that the proposed smartphone application allows the driver to control and to monitor the charging process of an EV conveniently and, moreover, it can provide the driver with vehicle information stored in the EVSE management server.In this paper, we propose a smartphone application based on a wireless fidelity(WiFi) in order to control the charging of electric vehicle(EV) and monitor the charging status together with the vehicle history information. The driver obtains much information on vehicle status through a smartphone application which communicates with the electric vehicle supply equipment(EVSE) management server while the EV also communicates with the EVSE for the authentification through controller area network(CAN). We also implement the simulator for the EV charging control system to verify the functions of the proposed application where the simulator consists of an EV model, an EVSE, and a smartphone. It is shown by the simulator that the proposed smartphone application allows the driver to control and to monitor the charging process of an EV conveniently and, moreover, it can provide the driver with vehicle information stored in the EVSE management server.

Implementation of Integrated Controller of ACC/LKS based on OSEK OS

Abstract This paper implements an integrated vehicle chassis system of ACC(Adaptive Cruise Control) and LKS(Lane Keeping System) based on OSEK OS to vehicle operating system and analyzes its performance through experiments. In recent years active safety and advanced driver assistance system has discussed to improve safety of vehicle. Among the rest, We integrate ACC that controls longitudinal velocity of vehicle and LKS that assists a vehicle in maintaing its driving lane, then implement integrated control system in vehicle. Implemented control system uses OSEK/VDX proposed standard, which is aiming at reusability and safety of software for vehicle and removal hardware dependence of application software. Redesigned control system based on OSEK OS, which is supported by OSEK/VDX, can manage real-time task, process interrupt and manage shared resource. We show by results performed EILS(ECU-In-the-Loop Simulation) that OSEK OS-based integrated controller of ACC and LKS is equivalent conventional integrated controller of ACC and LKS.

Electric Vehicle Charging Control System Hardware-In-the-Loop Simulation(HILS) with a Smartphone

This paper presents EV(Electric Vehicle) charging control system HILS with a smartphone. The charging control system is consisted of an EV, an EVSE(Electric Vehicle Supply Equipment), a smartphone and EV-to-environment communication mechanism, where the mechanism is based on a smartphone core and on the Bluetooth. We implement a Bluetooth-CAN gateway in an EV for the interconnection between a smartphone and an EVSE. The system focuses to combine information technology and to provide convenience of drivers for EV charging. It is shown by using the charging control system HILS that EV charging process can be easily controlled and monitored via a smartphone.