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차량 주행성능 분석을 위한 자료 획득 장치 개발에 관한 연구
선우명호(Myoungho Sunwoo),이재인(Jaein Lee),이우택(Wootaik Lee),이상준(Sangjun Lee),주원철(Wonchul Ju),최시홍(Sihong Choi),이상태(Sangtae Lee),이현수(Hyunsoo Lee),이경민(Kyungmin Lee) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
To evaluate the powertrain performances and driving behavior of a vehicle, it is necessary to survey the driving patterns, which have influences on fuel economy and emissions.<br/> The driving patterns are depended on the driver's habit and the road and traffic conditions. An in-vehicle data acquisition system, which is called Mode Survey System(MOSS), is designed and developed to analyze the driving patterns of the actual driver. Furthermore MOSS would be able to make a common driving mode to be used in emission, fuel efficiency, shift survey, catalyst durability, and other tests using the analyzed driving patterns.<br/> MOSS is a stand-alone system based on the 68HC11 MCU. It mainly consists of an MCU-based Hardware and a PC-based software. MOSS logs various data relating to powertrain and vehicle driving such as vehicle speed, engine RPM, gear position, brake, clutch, fuel consumption, and others. For analysis of the driving data, MOSS software, which is easy to use, can be used to analyze the driving patterns. Both the real-time processing and the post processing function for driving data analysis are available.<br/>
VEHICLE ELECTRIC POWER SIMULATOR FOR OPTIMIZING THE ELECTRIC CHARGING SYSTEM
Lee, Wootaik,Sunwoo, MyoungHo The Korean Society of Automotive Engineers 2001 International journal of automotive technology Vol.2 No.4
The vehicle electric power system, which consists of two major components: a generator and a battery, which have to provide numerous electrical and electronic systems with enough electrical energy. A detailed understanding of the characteristics of the electric power system, electrical load demands, and the driving environment such as road, season, and vehicle weight is required when the capacities of the generator and the battery are to be determined for a vehicle. An easy-to-use and inexpensive simulation program may be needed to avoid the over/under design problem of the electric power system. A vehicle electric power simulator is developed in this study. The simulator can be utilized to determine the optimal capacities of generators and batteries. To improve the expandability and easy usage of the simulation program, the program is organized in modular structures, and is run on a PC. Empirical electrical models of various generators and batteries, and the structure of the simulation program are presented. For executing the vehicle electric power simulator, data of engine speed profile and electric loads of a vehicle are required, and these data are obtained from real driving conditions. In order to improve the accuracy of the simulator, numerous driving data of a vehicle are logged and analyzed.
VEHICLE ELECTRIC POWER SIMULATOR FOR OPTIMIZING THE ELECTRIC CHARGING SYSTEM
Wootaik Lee,Myoungho Sunwoo 한국자동차공학회 2001 International journal of automotive technology Vol.2 No.4
The vehicle electric power system, which consists of two major components: a generator and a battery, which have to provide numerous electrical and electronic systems with enough electrical energy. A detailed understanding of the characteristics of the electric power system. electrical load demands, and the driving environment such as road, season. and vehicle weight is required when the capacities of the generator and the battery are to be determined for a vehicle. An easy-to-use and inexpensive simulation program may be needed to avoid the over/under design problem of the electric power system. A vehicle electric power simulator is developed in this study. The simulator can be utilized to determine the optimal capacities of generators and batteries. To improve the expandability and easy usage of the simulation program, the program is organized in modular structures, and is run on a PC. Empirical electrical models of various generators and batteries, and the structure of the simulation program are presented. For executing the vehicle electric power simulator, data of engine speed profile and electric loads of a vehicle are required, and these data are obtained from real driving conditions. In order to improve the accuracy of the simulator, numerous driving data of a vehicle are logged and analyzed.<br/>
Estimation of Load torque for Motorized Seat Belt System with Reduced-order Observer
Kangseok Lee,Chinchul Choi,Wootaik Lee 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10
This paper describes design and verification of reduced-order state observer to estimate state information such as angular velocity and load torque of a dc-motor for generating tension of the motorized seat belt (MSB) system. The MSB system provides functions to protect passengers and improve passenger’s convenience. To generate the exact tension to passenger, angular velocity and load torque should be measured or estimated. State information for MSB operations can be estimated without sensors by use of the reduced-order observer. The reduced-order observer is designed by the developed state space model. Designed reduced-order observer and retraction control algorithm are verified by experiments on the test bench.
모델 기반 차량 전장 시스템 개발 프로세스에 관한 연구
이광열(Kwangyeol Lee),홍성준(Soungjoon Hong),오승호(Sungho Oh),이우택(Wootaik Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Model Based Development Process (MBDP) is popular between automotive electronic industries and automotive company recently. Customer demands have increased and convenience function is more and more complicated in the automotive body system. Model Based Development Process has a merit which can reduce a development period and enhance the reusability of software. This paper describes the DPI Model Based Development Process (DPI-MBDP). It is intended to give a DPI process of developing ECU and system software. Model-based development, in which a simulation model (e.g., Statemate model) is used to finalize software specifications, is used during specification design (prototyping) prior to verification. Rather than immediately verifying the prototype software on actual equipment, an environment (model) is first created in which the actual control of an ECUs can be simulated and verification of the virtual operation performed. In this way, logical mistakes in the specifications, mistakes in micro controller control register configuration and other design errors can be detected in advance, without having to use actual equipment. Moreover, since exception-handling routines can be verified in advance, the burden faced during verification of actual equipment can be reduced and software development performed more efficiently. This process and methodology is applied to a development of a driver memory seat controller as an example.
개발 프로세스 모델에 따른 전동식 안전벨트 제어 시스템 개발
이강석(Kangseok Lee),이우택(Wootaik Lee) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper describes the development of a control system for a motorized seat belt. The traditional seat belt can protect passengers only after accidents as a passive safety system. The developed motorized seat belt could cover some weak points of the passive safety system. As a seat belt is developed to an active safety system, the software gets more importance than traditional system. Therefore, tests such as functional, unit and system test are necessary to develop the motorized seat belt control system. In this paper, we defined operations of a motorized seat belt and make its functional model. Operations of motorized seat belt are confirmed by simulations of a functional model. We confirmed the implemented code by software unit tests. Finally, the integrated motorized seat belt system is confirmed by system test. The motorized seat belt system is guaranteed its reliability by these tests.
모터 구동식 조향 장치의 전자 제어 시스템 개발에 관한 연구
이재인(Jaein Lee),선우명호(Myoungho Sunwoo),이우택(Wootaik Lee),이용국(Yongkuk Lee),우덕현(Dukhyun Woo),김충경(Chungkyong Kim) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
Global competition of automotive market and affordable prices of electronic components become the major reason that automotive industries rpidly employ a large number of electric and electronic syseems to improve vehicle performance and to meet various regulations such as emission, fuel efficiency, and safety. Especially, the provision of a motor-driven steering column (MDSC) for luxury vehicle is getting popular for drivers' covenience. In this study, an MDSC is developed, which provides several intelligent features such as the manual operation for tilting and telescoping the steering wheel, and the save/recall operation for three different steering wheel positions. In addition, the over-current detecting circuit will protect the DC motors, and the diode circuitry for the power input will also protect the electric circuit of the ECU for reverese connection to power and ground.<br/>
홀센서를 이용한 자동차 공기 블로워용 고속 영구자석형 전동기의 구동
이경진(Kyeongjin Lee),최진철(Chinchul Choi),이우택(Wootaik Lee) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
The air blower for a HVAC system requires high power density and efficiency, and Permanent Magnetic (PM) motor is suitable to be used the system. In this paper, a drive of the high speed PM motor is achieved by using Hall-effect sensors which have a low resolution of only 60 electrical degrees. The high resolution position information of rotor is obtained from the signal of sensors with a method of rotor position estimation. The method is implemented from software with 16 bit timer of DSP. With this method, some disadvantages such as high cost and low mechanical intensity of the high resolution sensors can be avoided in driving the PM motor. The performance of the proposed motor drive system is validated from several simulation and experimental results.