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RDE 실험 기법(MAW, PB)을 활용한 실도로 주행 연비 비교
김탁규 ( Tahkkyoo Kim ),박정민 ( Jeongmin Park ),배종원 ( Jongwon Bae ),정환중 ( Hwanjung Jung ),이진욱 ( Jinwook Lee ) 한국액체미립화학회 2018 한국액체미립화학회 학술강연회 논문집 Vol.2018 No.-
The European Union (EU) has enacted real driving emissions regulations for gaseous substances in Lightduty vehicles since 2017. In Korea, however, new regulations about WLTC and RDE were postponed. So, it is necessary to revise RDE regulations. Furthermore, fuel consumption must be measured at the same time as emissions to prevent defeat devices. Therefore, this study was carried out to analyze the characteristics of RDE evaluation criteria for fuel economy measurement of light-duty diesel vehicles. In order to do this research, we compared the verification with the measured value of the chassis dynamometer using the official PEMS(AVL).
김덕현,김탁규,홍정표 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-
In this paper, the static and dynamic characteristics of clow-poled PM step motor is analyzed by Finite Element Method. Step by step technique coupled with circuit and mechanical equation are performed. And moving line technique is applied to reduce the computing time when unit step response and dynamic characteristics are analyzed. Driving circuit for experiment is made and to conform the validity of this study and analysis results are compared with experimental ones.
디젤엔진용 Cam-in-Cam시스템 적용 가변밸브 성능해석
정석철,박정민,김탁규,이진욱 한국분무공학회 2017 한국액체미립화학회지 Vol.22 No.1
In this study, the effects of intake valve closing timing by using Cam-in-Cam system on combustion and emission characteristics for diesel engine were investigated under GT-POWER simulation environment. As a result, it was found that volumetric efficiency and effective compression ratio were decreased as the intake valve closing(IVC) timing is retarded due to its backflow effect. Also, we found that in-cylinder pressure, heat release rate and NOx emission were decreased as IVC timing was retarded. These show that the LIVC(late intake valve closing) can be effective to control AFR and mixing rate in diffusion combustion of diesel engine.
자동차 동력원별(ICEV, PHEV) 연비산출 모델개발 및 이의 검증
김주환 ( J. W. Kim ),박정민 ( J. M. Park ),김탁규 ( T. K. Kim ),이진욱 ( J. W. Lee ) 한국액체미립화학회 2017 한국액체미립화학회지 Vol.22 No.2
CO<sub>2</sub> emission regulation will be prescribed and main issue in automotive industry. Mostly, vehicle`s fuel efficiency deeply related to CO<sub>2</sub> emission is regulated by qualified driving test cycle by using chassis dynamometer and exhaust gas analyser. But, real driving fuel consumption rate depends so much on the individual usage profile and where it is being driven: city traffic, road conditions. In this study, vehicle model of fuel consumption rate for ICEV and PHEV was developed through co-simulation with CRUISE model and Simulink based on driving control model. The simulation results of fuel consumption rate were analysed with on-road vehicle data and compared with its official level.
채널 부호의 선형성을 이용한 길쌈 인터리버의 파라미터 추정
이주병(Jubyung Lee),정정훈(Jeonghoon Jeong),김상구(Sanggoo Kim),김탁규(Takkyu Kim),윤동원(Dongweon Yoon) 大韓電子工學會 2011 電子工學會論文誌-TC (Telecommunications) Vol.48 No.4
인터리빙은 채널 상에서 발생하는 연집 오류를 랜덤 오류로 변환하기 위하여 채널 부호화된 정보를 일정한 규칙에 의해 심볼 단위로 분산시킨다. 따라서 수신기에서, 송신 시 사용된 인터리버에 대한 파라미터를 알지 못하는 경우, 미지의 인터리빙된 신호를 디인터리빙 하기가 어렵게 된다. 최근 이러한 미지의 인터리빙된 신호에 대해 인터리버의 파라미터를 추정하여 신호를 복원하는 여러 연구가 진행되어 오고 있다. 이러한 연구들은 주로 블록 인터리버의 파라미터를 추정하는 데 초점을 맞추고 있다. 이 논문에서는 기존 연구들을 발전시켜 길쌈 인터리버에 대하여 쉬프트 레지스터 수, 레지스터 크기 및 부호어 길이 등의 인터리버의 파라미터를 추정하고, 목표 디인터리버를 재구성하여 디인터리빙하는 방법을 제안한다. An interleaver rearranges a channel-encoded data in the symbol unit to spread burst errors occurred in channels into random errors. Thus, the interleaving process makes it difficult for a receiver, who does not have information of the interleaver parameters used in the transmitter, to de-interleave an unknown interleaved signal. Recently, various researches on the reconstruction of an unknown interleaved signal have been studied in many places of literature by estimating the interleaver parameters. They, however, have been mainly focused on the estimation of the block interleaver parameters required to reconstruct the de-interleaver. In this paper, as an extension of the previous researches, we estimate the convolutional interleaver parameters, e.g., the number of shift registers, a shift register depth, and a codeword length, required to de-interleave the unknown data stream, and propose the de-interleaving procedure by reconstructing the de-interleaver.