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센서 네트워크에서의 Rule-Base 기반 상황 인식 미들웨어
김금란(GeumLan Kim),김진아(J.A. Kim),김세웅(S.W. Kim),김창화(C.H. Kim),김상경(S.K. Kim),박찬정(C.J Park) 한국정보과학회 2006 한국정보과학회 학술발표논문집 Vol.33 No.2C
상황인식 처리기술은 사용자의 컨텍스트에 근거하여 사용자와 장치간의 상호 운용성을 지원해 줌으로써, 사용자로 하여금 정보 획득 및 실행을 보다 용이하게 하도록 해주는 기술이다. 여러 상황변화가 발생할 경우 이에 따라 서비스 전달 방식을 동적으로 적응시키기 위하여 상황에 대한 명시적인 요구사항을 정의하고 이 정의 된 상황을 각 노드에 전파하고 노드에 포함된 미들웨어는 전파된 상황에 적합한 센싱된 정보를 분석하여 특정한 상황의 발생과 이에 따른 액션을 수행하며 또한 센서에서 취득한 컨텍스트로 부터 통합된, 추론된 컨텍스트를 생성한다. 본 논문에서는 센서로부터 다양한 타입의 컨텍스트를 처리 할 수 있는 미들웨어를 제안한다. 이 미들웨어는 변화하는 주변 환경에서 센서로부터 센싱된 컨텍스트 뿐 아니라 통합된, 추론된 컨텍스트를 생성할 수 있도록 설계 되었다. 제안한 상황인식 미들웨어를 기반으로 사용자 질의 요청과 이벤트 상황 질의를 설계하였으며, 이벤트 상황 질의의 추론 DB를 명시하기 위하여 Clips 언어를 사용하였다.
공기 보조 연료 분사 장치가 있는 가솔린 기관의 희박 연소에 관한 연구
김세웅(S. W. Kim),김응서(E. S. Kim) 한국자동차공학회 1994 한국 자동차공학회논문집 Vol.2 No.2
This paper describes the effect of air assisted fuel injection system(AAr) using compressed air to improve the performance of lean combustion engine. AAI is designed to promote fuel atomization and intake flow. In order to investigate the performance of engine with AAI, experiments are conducted varying the engine revolution speed, lean air-fuel ratio and intake manifold pressure.<br/> Compared with the original engine, the performance of the engine with AAI is improved as the air-fuel mixture becomes leaner or the engine load becomes lower. The descreasing rate of BSFC is propotional to the relative air-fuel ratio and the lean misfire limit extended more than 0.2 relative air fuel ratio.<br/> This paper describes the effect of air assisted fuel injection system(AAr) using compressed air to improve the performance of lean combustion engine. AAI is designed to promote fuel atomization and intake flow. In order to investigate the performance of engine with AAI, experiments are conducted varying the engine revolution speed, lean air-fuel ratio and intake manifold pressure.<br/> Compared with the original engine, the performance of the engine with AAI is improved as the air-fuel mixture becomes leaner or the engine load becomes lower. The descreasing rate of BSFC is propotional to the relative air-fuel ratio and the lean misfire limit extended more than 0.2 relative air fuel ratio.<br/> This paper describes the effect of air assisted fuel injection system(AAr) using compressed air to improve the performance of lean combustion engine. AAI is designed to promote fuel atomization and intake flow. In order to investigate the performance of engine with AAI, experiments are conducted varying the engine revolution speed, lean air-fuel ratio and intake manifold pressure.<br/> Compared with the original engine, the performance of the engine with AAI is improved as the air-fuel mixture becomes leaner or the engine load becomes lower. The descreasing rate of BSFC is propotional to the relative air-fuel ratio and the lean misfire limit extended more than 0.2 relative air fuel ratio.<br/>
크랭크축 각속도의 변동을 이용한 실화 판정(2)-실차 실험-
배상수(S.S.Pae),남하욱(B.J.Lim),김세웅(S.W.Kim),김응서(E.S.Kim) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
To keep up with the regulation of OBD Ⅱ ( on board diagnostics Ⅱ ). many detection methods have been developed. Among them. the method of using the crankshaft speed fluctuation is most noticeable in the point of<br/> view of lower cost and easily-equipped charateristics. On the basis of the results obtained by the experiment of the engine and dynamometer. the integrating torque index (ITI) has been introduced.<br/> In this research, the instrumental and the interfacing systems to engine control unit ( ECU ) are developed for the vehicle test. So the vehicle and chassy-dynamometer test can be carried out in addition to the rough road test.<br/> From this test. the method proposed before proved to be applicable to the real vehicle<br/>
크랭크축 각속도의 변동을 이용한 실화 판정 ( 2 ) - 실차 실험 -
배상수(S. S. Bae),김세웅(S. W. Kim),임인건(I. K. Lim),김응서(E. S. Kim) 한국자동차공학회 1996 한국 자동차공학회논문집 Vol.4 No.5
To keep up with the regulation of OBD II (on board diagnostics II), many detection methods for engine misfire have been developed. Among them, the method of using the crankshaft speed fluctuation is the most noticeable in the point of view of lower cost and easier installation than any others. On the basis of the results obtained from the previous engine-dynamometer test, the integrating torque index (ITI) has been introduced.<br/> In this research, the instrumental and the interfacing systems to engine control unit(ECU) are developed for the vehicle test. Therefore, the vehicle and chassis-dynamometer test can be carried out in addition to the rough road test. From this test, the previous proposed method proved that it can be applied to the real vehicle.<br/>
배상수(S.S.Pae),임병진(B.J.Lin),김세웅(S.W.Kim),김응서(E.S.Kim) 한국자동차공학회 1996 한국 자동차공학회논문집 Vol.4 No.2
The crankshaft speed fluctuation was measured every crank angle. In order to detect the misfire, the engine and the dynamometer were considered as a single-degree of freedom system. From this modeling, the detection criteria were derived and examined by the engine test. By this method the single misfire or multiple misfires can be detected. Even on tho condition of low load and highr speed than 3000rpm. where it was difficult through the other methods, misfire detection was carried out steadily. From this results, the method proposed by this paper proved reasonable.
가위형 링크 기구를 이용한 기관의 피스톤 온도 분포 측정
김재업(J. U. Kim),이종화(J. H. Lee),김세웅(S. W. Kim),김응서(E. S. Kim) 한국자동차공학회 1993 한국 자동차공학회논문집 Vol.1 No.2
The program for the development of linkage system was made and the scissors-type linkage system was designed. The piston temperature distribution under steady state was measured by the linkage system and thermocouple. The effects of engine speed, coolant outlet temperature, and torque on the piston tempera-ture were investigated.<br/> The peak temperature finds itself at the center of piston crown and the temperature of the exhaust valve side is about 10℃ higher than that of the intake valve side. As engine speed increases, piston temperature goes up almost linearly and the increasing rate was lower in the skirt than in the crown. As coolant outlet temperature increases by 10℃, piston temperature increases by 6~7°C at each measuring point In case of torque the increasing rate is higher in the lower load than in higher load.<br/> The scissors-type linkage system is useful for temperature measurements and can be used in other physical property measurements in the moving parts, such as piston and connecting rod assembly.<br/>