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분류트리방법과 상태천이시험법을 결합한 모터제어기의 체계적인 기능 시험 방법
이우택(Wootaik Lee),정호영(Hoyoung Jeong),권재희(Jaehee Kwon) 한국자동차공학회 2019 한국 자동차공학회논문집 Vol.27 No.2
A systematic function test technique is proposed, and its feasibility is evaluated through a practical motor controller function test. This technique organizes the test case generation procedure in four phases to derive the test cases systematically, and combines conventional test techniques to cover all the aspects of functions-under-test in a unified manner. The proposed technique is mainly based on a classification-tree method, and adopts a state transition test method to cover the functions of dynamic systems without missing any test case and with less redundancy in test cases. Considering whether or not the inputs of functions-under-test are related with system states, the inputs are classified into basic inputs, discrete-state inputs, and continuous-variable dynamic inputs. The dynamic functions are modeled as state-machine, and test sequences are derived by using a state-transition tree to cover all the states and the transitions of the state-machine. The classification-tree method framework represents all derived test sequences in a graphic manner, and alleviates testers’ difficulties by managing test cases.
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/>
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/>
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.
차량용 전자제어시스템을 위한 AUTOSAR 대응 경량화 소프트웨어 아키텍처 연구
이강석(Kangseok Lee),박인석(Inseok Park),선우명호(Myoungho Sunwoo),이우택(Wootaik Lee) 한국자동차공학회 2013 한국 자동차공학회논문집 Vol.21 No.1
This paper presents AUTOSAR-ready light software architecture (AUTOSAR-Lite), which is a light weighted version of the AUTOSAR, for automotive embedded control systems. The proposed AUTOSAR-Lite reduces overhead problems caused by the excessive standard specifications of AUTOSAR. Concurrently, AUTOSAR-Lite keeps advantages of AUTOSAR such as a scalability, re-usability, reliability, and transferability. The fundamental design of AUTOSAR-Lite is originated from the AUTOSAR standard. AUTOSAR-Lite is composed of three layers such as an application software, runtime environment, and basic software layer. The application software layer adopts component-based design methodology as AUTOSAR. The runtime environment layer integrates interfaces between application and basic software layers. In case of the basic software layer, restrictions of the module configurations and interfaces of basic software are minimized. In order to validate the feasibility of AUTOSAR-Lite, a software design result based on AUTOSAR-Lite software architecture for electronic throttle control (ETC) system is suggested.
MEMS센서를 활용한 AHRS개발 및 6축 모션플랫폼을 이용한 성능 평가
이한주(Hanjoo Lee),이우택(Wootaik Lee) 항공우주시스템공학회 2019 항공우주시스템공학회 학술대회 발표집 Vol.2019 No.5
이동형 로봇과 스스로 임무를 수행하는 로봇 시스템의 역할이 우리 사회에서 점점 커지고 있다. 이러한 사회 변화에 대응하여 항법 및 자세 측정 시스템에 대한 수요가 증가하고 관련 연구가 진행되어지고 있다. 특히 Mems 형 항법장치 구현은 다른 방식보다 상대적으로 비용이 매우 저렴하나, 전기적 잡음 문제 및 적분오류, 자기 오류 문제가 있다. 본 논문에서는 센서 퓨전 알고리즘을 사용하여 Mems 형 항법장치 구현 시 발생되는 문제들을 해결하고, 6축 모션 플랫폼을 이용한 시스템 평가 방안을 제안한다.
이강석(Kangseok Lee),최진철(Chinchul Choi),이우택(Wootaik Lee) 한국자동차공학회 2012 한국 자동차공학회논문집 Vol.20 No.3
This paper describes a design and a verification of linear state observers for a motorized seat belt system to estimate state information such as angular velocity and load torque. The motorized seat belt system provides functions to protect passengers and improve passenger’s convenience. To realize these functions, sensors which can measure an angular velocity and load torque are needed. By use of the linear state observer, state information can be estimated without sensors. The motorized seat belt system is analysed and represented as a state space model which contains load torque as an augmented state. By the developed state space model, a full and reduced order observer are designed and verified by experiments. The full and reduced order observer are also compared from points of view of execution time and noise robustness.
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.
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.