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Electro-Thermal Modeling and Experimental Validation of Integrated Microbolometer with ROIC
Kim, Gyungtae,Kim, Taehyun,Kim, Hee Yeoun,Park, Yunjong,Ko, Hyoungho The Institute of Electronics and Information Engin 2016 Journal of semiconductor technology and science Vol.16 No.3
This paper presents an electro-thermal modeling of an amorphous silicon (a-Si) uncooled microbolometer. This modeling provides a comprehensive solution for simulating the electro-thermal characteristics of the fabricated microbolometer and enables electro-thermal co-simulation between MEMS and CMOS integrated circuits. To validate this model, three types of uncooled microbolometers were fabricated using a post-CMOS surface micromachining process. The simulation results show a maximum discrepancy of 2.6% relative to the experimental results.
Multi-agent 주행시뮬레이션을 이용한 공격성향 위험운전 이벤트 검지기법 개발
김윤종(KIM, Yunjong),오철(OH, Cheol),최병호(CHOE, Byongho),최새로나(CHOI, Saerona),김기용(KIM, Kiyong) 대한교통학회 2018 大韓交通學會誌 Vol.- No.-
공격운전은 밀착주행과 급감속과 같은 행위로 상대 운전자를 위협하는 고의적인 행동으로 교통사고 발생 가능성이 높은 위험운전이벤트이다. 본 연구에서는 Multi-agent 주행 시뮬레이션 실험을 통해 공격운전 가해자와 피해자의 상호작용을 차량거동형태를 분석하였다. 운전자의 고의적인 공격의지 검지를 위해 주행패턴을 효과적으로 상대 평가할 수 있는 지표(Erratic Driving Index, EDI)를 도출하였다. 기존의 상용차의 디지털운행기록계 자료를 활용한 위험운전 검지기법과 본 연구에서 도출한 EDI를 연계한 공격운전 검지 방법론을 새롭게 개발하였고 활용성을 평가하였다. 공격운전을 억제하고 운전자의 안전운전을 유도하는 운전자 행태 관리를 위해 본 연구의 결과물이 효과적으로 사용될 것으로 기대된다. Intentional aggressive driving (IAD) is defined as a hazardous driving event that the aggressive driver intentionally threatens neighbor drivers with abrupt longitudinal and lateral maneuvering. This study developed a methodology for detecting IAD events based on the analysis of interactions between aggressive driver and normal driver. Three major aggressive events including rear-close following, side-close driving, and sudden deceleration were analyzed to develop the algorithm. Then, driving simulation experiments were conducted using a multi-agent driving simulator to obtain data to be used for the development of the detection algorithm. In order to detect the driver’s intention to attack, a relative evaluation index (Erratic Driving Index, EDI) reflecting the driving pattern was derived. The derived IAD event detection algorithm utilizes both the existing absolute detection method and the relative detection method. It is expected that the proposed methodology can be effectively used for detecting IAD events in support of in-vehicle data recorder technology in practice.
최윤종(Yunjong Choi),김홍성(Hongsung Kim),박정서(Jungseo Park),김문헌(Munheon Kim) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
This study introduced the bulk combustion systems instead of the conventional gasoline spark ignition system and diesel compression ignition system. To achieving both high efficiency, without ignition systems to the conventional single cylinder diesel engine, established the inlet-air heating and control systems for the heating and controlling of inlet-air.<br/> The lean limit of air-fuel ratio improved by the inlet-air heating with the compression ignition combustion systems' and the allowable air-fuel ratio extended to 63 when the temperature of the inlet-air was 170 ℃ and the engine speed 1000 rpm.<br/> The cycle maximum pressure and the brake mean effective pressure increased to proportional, when the air-fuel ratio was richer.<br/> The brake specific fuel consumptions increased largely at the air-fuel ratio was above 45 and affected strongly by the inlet-air heating temperature.<br/> The maximum brake thermal efficiency showed at the air-fuel ratio was 35 and decreased in case the leaner region and improved the higher inlet-air heating temperature.<br/> The maximum heat release rate increased in according to decreased and advanced the<br/> accurance period of the maximum heat release rate.<br/> Also, as showed the mass burned rate, the burning period shorted and established the rapid combustion in according to the air-fuel ratio decreasing.<br/>
Electro-Thermal Modeling and Experimental Validation of Integrated Microbolometer with ROIC
Gyungtae Kim,Taehyun Kim,Hee Yeoun Kim,Yunjong Park,Hyoungho Ko 대한전자공학회 2016 Journal of semiconductor technology and science Vol.16 No.3
This paper presents an electro-thermal modeling of an amorphous silicon (a-Si) uncooled microbolometer. This modeling provides a comprehensive solution for simulating the electro-thermal characteristics of the fabricated microbolometer and enables electro-thermal co-simulation between MEMS and CMOS integrated circuits. To validate this model, three types of uncooled microbolometers were fabricated using a post-CMOS surface micromachining process. The simulation results show a maximum discrepancy of 2.6% relative to the experimental results.