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성기안,임찬규 도립 강원전문대학 1999 道立 江原專門大學 論文集 Vol.2 No.-
The purpose of this study is the development of a Roof Airbag System for protection of rear seat passenger from frontal impacts. First the development concept has been carried out pre-prototype stage sled tests to confirm the propriety of a roof-mounted airbag system. To predict occupant kinematic and injury potential in various conditions, the occupant analysis by using the Madymo-3D has been performed and the mandatory test matrix has been determined. As the result of sound power and pressure tests, we confirmed the concurrent deployment of several airbags is harmless to human's hearing organs. To evaluate the final design specification of this system, sled tests by using improved samples have been carried out.
전기수력학적 미립화에서 액적 형성에 영향을 미치는 인자에 관한 실험적 연구
성기안 ( K. A. Sung ),이창식 ( C. S. Lee ) 한국분무공학회 2003 한국액체미립화학회지 Vol.8 No.2
N/A An experimental study was performed to investigate the influence factors of drop formation in electrohydrodynamic atomization. The mode of electrohydrodynamic depended on the various factors such as the flow rate of the liquid, the inner diameter of the nozzle, the distance between the nozzle tip and the ground electrode, the shape of the ground electrode, and the applied high voltage. This work was performed to investigate the experimental analysis for the flow pattern visualization of droplets, and the relationship between voltage application and the behavior of liquid atomization. Uniform drops of different sizes can be obtained at the inception of the spindle mode by charging the flow rate and the electric field. The drop size also decreased when the flow rate was raised for the spindle mode. The whipping motion occurred beyond 7kV and before the corona started to take effect.
분산제어(DSI)기법을 적용한 에어백 제어기의 설계 및 운영체제 개발
성기안(kian Sung),김익환(Ik Hwan Kim),이창식(Chang Sik Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The DSI technology in the side satellite sensors of an airbag ECU which are applied to decide side collisions effectively has been studied recently for common and multiple uses. The side satellite sensor with DSI technology can interface to the two-wire DSI bus using a combination of pulse length encoded voltage levels for transmission of data to remote peripheral units, and can apply to the different vehicles with no software calibration. The DSI is intended as a robust serial interface system suitable for automotive body applications including airbag safety system. <br/> The new airbag ECU was set up with the airbag firing loop ICs with 6 channels (4 frontal channels and 2 side channels) for DC firing and firing loop monitoring, a micromachined capacitive accelerometer with a 2-pole Bessel 400㎐ S/C filter, a multifunctional power supply IC, and the DSI digital and physical ICs. The applied MC9S12DJ256 microcontroller is the next generation of the higher performance and equip with a real time OS and a new crash recognition algorithm. The real time OS is observed the several functions as the internal and external fault diagnostic function, a communication function, and a crash history recording function.<br/> The time-to-fire of the airbag ECU is in qualitative agreement with the requirement time-to-fire of OEM vehicle maker. We have obtained the satisfactory results and wish to future study about an advanced airbag ECU using this technology.
2중연료(디젤+가솔린)의 RCCI 연소 및 배기 특성에 관한 실험적 연구
성기안 ( K. A. Sung ) 한국분무공학회 2011 한국액체미립화학회지 Vol.16 No.1
An experimental study was performed to explore characteristics of combustion and exhaust emissions in the compression ignition engine of RCCI (reactivity controlled compression ignition) using diesel-gasoline dual fuel. A dual-fuel reactivity controlled compression ignition concepts is demonstrated as a promising method to achieve high thermal efficiency and low emissions. For investigating combustion characteristics, engine experiments were performed in a light-duty diesel engine over a range of SOIs (start of injection) and gasoline percents. The experimental results showed that cases of diesel-gasoline dual fuel combustion is capable of operating over a middle range of engine loads with lower levels of NOx and soot, acceptable pressure rise rate, low ISFC (indicated specific fuel consumption), and high indicated thermal efficiency.
전기수력학적 미립화에서 교류 주파수가 액적 분열에 미치는 영향
성기안 ( K. A. Sung ),이창식 ( C. S. Lee ) 한국분무공학회 2004 한국액체미립화학회지 Vol.9 No.2
N/A Liquid breakup under the variation of AC frequency has been studied experimentally in the electrohydrodynamic atomization. The effect of parameters such as charging voltage, flow rate, nozzle tip inner diameter and power frequency have been considered. This work was performed to investigate the experimental analysis for the effect of AC frequency on breakup process, the mapping of occurrence of disintegration region, and the relationship between the applied power and the droplet radius. The experimental results show that the increase of applied voltage in a certain frequency band leads to a reduction in the droplet size within the limits from 50㎐ to 400㎐. The transition phenomena from dripping mode to spindle mode were observed under the band of sudden fall of droplet radius changing ratio, and the synchronous region were produced within the range of applied voltage from 5㎸ to 6㎸.