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32-bit 임베디드 시스템을 이용한 자동변속기용 전자제어시스템의 Software-in-the-loop simulation
장인규(In-Gyu Jang),서인근(Inkeun Seo),전재욱(Jaewook Jeon),황성호(Sung-Ho Hwang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Drivers are becoming more fatigued and uncomfortable as traffic densities increase, which can lead to slower reaction time, They then face the danger of traffic accidents due to an inability to cope with frequent shifting, To reduce this risk some drivers prefer automatic transmissions (AT) to manual transmissions (MT), The AT is superior drivability and less shifting shock than the MT, so the market-share of AT is increasing, The AT is controlled by Electronic Control Unit (ECU) to obtain better shifting performance, The Transmission Control Unit (TCU) is a product of higher-value-added, so the companies which have advanced technology (BOSCH, SIEMENS VDO, DELPHI, and etc.) tend to evade technology transfer. As the number of ECU used on a car is increasing gradually (for example, engine management unit, transmission control unit, brake control unit, and powertrain control unit), TCU's performance is expected to be faster and more efficient for organic communication and arithmetic processing between the control systems than the performance of 16bit controller. In this paper, the model of automatic transmission vehicle using MATLAB/Simulink is developed for the hardware in-the-loop simulation with an embedded system. The AT control logic developed is loaded to 32-bit Embedded system platform developed on the basis of Freescale's MPC565, and we execute the Software-in-the-loop simulation (SILS) of AT based on Real Time Operating System (RTOS). These test results show that the developed embedded system can be used as AT control unit.
자동변속기용 임베디드 시스템 성능 시험을 위한 Hardware-in-the-Loop 시뮬레이터 구축
장인규(In-Gyu Jang),서인근(Inkeun Seo),전재욱(Jaewook Jeon),황성호(Sung-Ho Hwang) 제어로봇시스템학회 2008 제어·로봇·시스템학회 논문지 Vol.14 No.3
Drivers are becoming more fatigued and uncomfortable with increase in traffic density, and this condition can lead to slower reaction time. Consequently, they may face the danger of traffic accidents due to their inability to cope with frequent gear shifting. To reduce this risk, some drivers prefer automatic transmission (AT) over manual transmission (MT). The AT offers more superior drivability and less shifting shock than the MT; therefore, the AT market share has been increasing. The AT is controlled by an electronic control unit (ECU), which provides better shifting performance. The transmission control unit (TCU) is a higher-value-added product, so the companies that have advanced technologies end to evade technology transfer. With more cars gradually using the ECU, the TCU is expected to be faster and more efficient for organic communication and arithmetic processing between the control systems than the l6-bit controller. In this paper, the model of an automatic transmission vehicle using MATLAB/Simulink is developed for the Hardware in-the-Loop (HIL) simulation with a 32-bit embedded system, and also the AT control logic for shifting is developed by using MATLAB/Simulink. The developed AT control logic, transformed automatically by real time workshop toolbox, is loaded to a 32-bit embedded system platform based on Freescale"s MPC565. With both vehicle model and 32-bit embedded system platform, we make the HIL simulation system and HIL simulation of AT based on real time operating system (RTOS) is performed. According to the simulation results, the developed HIL simulator will be used for the performance test of embedded system for AT with low cost and effort.
ECU 및 TCU 신호를 이용한 자동차의 공회전 자동정지 제어 시스템 개발
김성수,Kim Seong-soo 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.7
본 연구에서는 자동차가 정지하면 지정된 수초이내에 자동차의 공회전 상태를 자동적으로 정지시키고, 운전자가 출발하고자 할 때는 약속된 전기신호로 엔진의 시동을 거는 차량용 공회전 자동정지 제어시스템을 개발하였다. 이 장치는 다수의 선별된 엔진제어유닛과 변속기제어유닛의 전기신호를 입력신호로 하는 마이크로프로세서와 기타 주변 전자회로로 구성되어 있으며 자동차의 운전상태를 인식할 뿐 아니라 냉각수 온도에 따라 그 작동을 조정하고 재시동시 연료분사스킵 기법을 적용하여 자동차의 연료절약 및 유해배출가스를 저감하는 효과를 가지고 있다. 국내의 자동차 연비 및 유해배출가스측정 공인기관에서 ECE15+EUDC모드에서 본 제어시스템 장착차량의 주행시험을 실시하여 그 효과를 확인하였고 실차 적용가능성을 확보하였다. In this study, an automatic idle stop control system was developed, which automatically stops the idle state engine as it detects the stop state of the car for several seconds and restarts the stopped engine with the driver's electrical signal. It is composed of microprocessor and the related electronic circuits and communicates with ECU and TCU. With accurate and confirmed operating performance, the control system was equipped in the test car which was proceeded the ECE15+EUDC mode test. It is confirmed that the control system, ASG has much favourable effects on reducing the fuel consumption and harmful exhaust emissions.
김부성(Boosung Kim),윤정주(Jeongjoo Yun),장준우(Junwoo Jang),김영광(Youngkwang Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This paper presents a design of AMT(automated manual transmission) system applied to the commercial hybrid vehicle. AMT system is based on the manual transmission and consists of clutch actuator, gear-shifting actuator, TCU and shift lever. AMT system has advantages about fuel consumption and driving convenience because the gear shifting is performed by the AMT system automatically like an automatic transmission. In this paper, it is analyzed that the requirements of AMT system and the components are designed and producted.
지게차의 운용 시간과 온도 조건을 고려한 변속기 제어 유닛(TCU)에 장착되는 집적 회로의 고장율 변화 특성 고찰
백종희(JongHee Baek),김경수(KyungSoo Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4
현재 건설기계의 자동화·지능화 기술 적용이 가속화되고 있으며, 자율 작업형 건설기계 시장의 급속한 확대가 예상되고 있지만, 국내에서는 하드웨어 및 소프트웨어 신뢰성을 동시에 확보하기 위한 기능 안전 설계/검증 절차의 적용이 아직까지 충분히 정립되어 있지 않은 실정이다. 특히, 강건 설계 개념을 포함하여 하드웨어의 신뢰성 확보를 위해서는 다양한 사용 환경에 따른 하드웨어의 고장율 추정이 매우 중요하지만, 승용차 등 도로 차량과는 사용 환경 및 스트레스 조건이 명확히 구별되는 건설 기계의 기능 안전 프로세스에 따른 작동-운용 시간과 온도 스트레스 조건(즉, 온도 분포 프로파일 및 열사이클 특성)이 충분히 고려된 하드웨어 고장율 특성이 아직까지는 많이 연구되어 있지 않은 실정이다. 따라서, 제어 유닛에 장착되는 집적 회로(IC)의 작동 시간과 온도 조건을 지게차의 실사용 조건에 근거하여 가정하고 ISO 26262-11의 고장율 산출 공식을 응용하여 고장율 추정 값의 변동 특성을 도출하였다. 그 결과 지게차의 작동 시간이 증가할수록 집적 회로의 고장율도 증가하고, 제어 유닛 장착 위치와 관련된 온도 특성에 따라서도 고장율이 달라지는 것을 확인하였으며, 이는 작동 시간 및 사용 조건에 따라 달라지는 고장율의 일반적 특성과도 일치하고 있다. 이와 같이, 완성 차 및 제어 유닛 작동 시간과 온도 조건에 따른 고장율 변동 특성은 향후 건설기계의 기능 안전 설계 적용 및 사용 수명을 고려한 부품 Nowadays, autonomous construction equipment are rapidly developed and applying to construction work-site widely, however, functional safety design/verification/validation processes ensuring hardware and software reliability of the construction equipment simultaneously is not yet sufficiently established in Korea. Especially, estimation of the random hardware failure rate based on the using conditions is very important to ensure hardware reliability including robustness. However, the failure rate characteristics based on the operating-times and stress conditions such as temperature variation of the complete vehicle and control units not yet have fully researched in the construction equipment, which have distinctively differentiated with using conditions and stresses comparing to that of road vehicle. Therefore, we carried out failure rate estimations of the Integrated Circuits(ICs) mounted on the Transmission Control Units of the fork-lift industrial trucks with the variation of operating-times and temperature conditions in accordance with the formulas presented in the ISO 26262-11(or IEC/TR 62380 withdrawn). As a result, failure rate of ICs have increments proportional to the increments of the vehicle operating-times, it also varied dependent on the temperature variation due to the mounted position of the control units, both of which are reasonably consistent with the failure rate characteristics in general. Such a review for failure rate estimation with the variation of operating-times and temperature conditions will be a very meaningful reference for functional safety process for the development of autonomous construction equipment manufacturers, in the near future.
상용 하이브리드 차량의 자동화 수동 변속기 변속 로직 개발
이상원(Sangwon Lee),우재진(Jaejin Woo),김영광(Youngkwang Kim),남광수(Kwangsoo Nam) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This paper describes development of AMT(Automated Manual Transmission) shift control logic applied to the commercial HEV(Hybrid Electric Vehicle). Shift control algorithm is composed of shift sequence according to hybrid mode and collaborative control with HCU(Hybrid Control Unit), ECU(Engine Control Unit) and MG(Motor & Generator), position control of clutch & shift actuator. The proposed algorithm is proven to be successful by experiments performed vehicle.