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신승협(Seunghyup Shin),신성용(Sung-Yong Shin) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.1B
최근 실시간 가상 인물 애니메이션 시스템이 활발하게 보급되면서 피부 모양을 자연스럽게 유지하면서도 고속으로 동작할 수 있는 인체 변형 방법이 요구되고 있다. 본 논문은 가상 인물을 구성하는 메쉬의 정점들을 회전 연산만으로 이동시켜 실시간에 인체를 변형하는 모델을 제안한다. 인체 변형의 전처리 과정으로 드로니 삼각화를 이용하여 각 정점의 회전 기준이 될 관절을 찾는 방법을 제시하고, 사원수 형태로 입력된 동작을 회전축의 방향에 따라 분해한 후 각 정점에 차등적으로 적용하여 피부를 자연스럽게 변형할 수 있음을 보인다.
연소실 형상과 다중분사각 노즐이 디젤 연소 및 배기 특성에 미치는 영향에 관한 연구
신승협(Seunghyup Shin),노현우(Hyunwoo Noh),최승목(Seungmok Choi),이정우(Jeongwoo Lee),민경덕(Kyungdoug Min) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
This paper presents characteristics of diesel combustion and emissions according to adoption of various combustion chamber shape and multi-spray-angle nozzle. Multi-spray-angle nozzle increases spray mixing by keep away from spray overlap. In this research, it is introduced different combustion chamber shapes. Combustion chamber shapes and injection timing affect emission characteristics due to change target area of spray in the combustion chamber. 7 holes in single row nozzle and 12 holes in double row nozzle were examined. To change combustion chamber shapes, single bowl piston as a reference and double bowl piston were used. Also, experiments were conducted according to different injection timing and injection pressure.
연료소비율 개선을 위한 고압/저압 배기재순환 시스템 구축 및 저온연소 엔진의 운전전략 수립
신승협(Seunghyup Shin),한영덕(Youngdeok Han),심의준(Euijoon Shim),김득상(Duksang Kim) 한국자동차공학회 2014 한국 자동차공학회논문집 Vol.22 No.3
This study researched on the effect of HP/LP-EGR system to improve fuel consumption of Low Temperature Combustion Engine. Firstly, low temperature combustion engine with HP/LP-EGR system was established using 6.0L wastegate turbocharger HDDI engine. And suppliable EGR rate of the engine was proven to be enough to realize stable low temperature combustion. Then, optimum operating strategy was founded to develop fuel consumption of the engine. Control parameters were HP/LP-EGR valve and IPCV(Intake Pressure Control Valve) duty. Experiments method was that characteristics of the engine were measured and analyzed according to HP/LP-EGR strategies while EGR rate was fixed. Operating range for the strategy were divided into three parts, low load for low temperature combustion, high load for conventional diesel combustion, and transient condition. Finally, with the above strategy of this study, BSFC of the engine was improved about 2% compared to the base engine, and emission level, NOx and PM, met Tier4Final emission regulation.