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흡음에 의한 도시철도 곡선부 스퀼 소음저감에 관한 연구
최진권,이재원,장서일 한국소음진동공학회 2001 한국소음진동공학회 논문집 Vol.11 No.4
Sound absorbing materials are applied to the exposed surfaces of curvet subway tunnel for the reduction of curving noise level. Before the treatment, acoustical engineering simulation is performed to predict the noise level reduction for different kinds and amounts of absorbing material. The principle of geometrical acoustics is utilized to perform the simulation efficiently and accurately. The noise bevels of the inside and outside of running car body are measured to find the noise level reduction. The average noise level reduction of 8 dB has been attained. It has been shown that the simulated results are comparable to the measured ones.
DOE와 FEA를 이용한 측면에어백용 Inflator 용기 설계 최적화
최진권(Jinkwon Choi),김대호(Daeho Kim),김병우(Byeongwoo Kim),최성규(Sunggyu Choi) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Optimizing design using DOE and FEA for inflator vessel of a side airbag was conducted in this study. ABAQUS was used for FEA and Minitab was used for optimizing design by DOE and data analysis. Experiments were designed using Full Factorial Design among Factorial Design and Central Composite Design among Response Surface Methodology. Data involved in reactive factors was obtained by Static, Dynamic Implicit, Dynamic Explicit Analysis and Query function. The results of Full Factorial Design have relatively large errors as contrasted with results of FEA. In contrast, the results of Central Composite Design have relatively small errors so those are more appropriate for optimizing design on Inflator vessel of side airbag.
최진권(Jinkwon Choi),김병우(Byeongwoo Kim),김대호(Daeho Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This study is about analysis of Electric Motorcycle. The proper design is needed because the geographic setting of Korea is rugged and the motorcycle driver usually drives reckless. So, we simulated the electric system. First, understood the input parameters and organized the document. Next, we gained the parameters and analyzed the internal calculation logic. In the case of modeling the components, we especially tried to model the battery and the motor. Verify the result by comparing the simulation value and the prototype motorcycle. A result is similar and we will try the optimization.
최진권(Choi, Jin-Kwon),김병우(Kim Byeong-Woo) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.11
전기 구동 이륜차는 우수한 연비 및 환경공해 능력 때문에 가장 유망한 미래 교통수단 중의 하나이다. 실제 전기 이륜차 시제품을 제작하기 전에 신뢰성이 확보된 시뮬레이션 프로그램을 통하여 전기 이륜차의 설계인자 최적 화와 동력원의 능력을 평가할 필요가 있다. 이 같은 과정을 통하여 전기 이륜차 시스템 설계 과정에서의 소요비용을 줄일 수 있다. 본 논문에서는 수월하게 Simulink와 PSAT을 이용하여 구동 및 동력 시스템을 모델링할 수 있는 Matlab 기반의 전기 이륜차 해석 프로그램을 제시하였다. 전기 이륜차의 최대 출력, 에너지 능력, 충전 상태, 등판 각도와 같은 설계 인자 해석을 실험과 시뮬레이션을 병행하였다. 본 연구에서 개발된 모델에 의해서 예측된 해석결 과는 실험에 의해서 얻어진 결과와 양호하게 일치하였다. Electric Motorcycle is one of the most promising candidates for future transportation because of its outstanding fuel economy and environmental pollution. Before prototyping a realistic electric motorcycle, a reliable simulation program is required to test the capacities of the power sources and optimize the parameters of an electric motorcycle. This process can reduce the expenses during the designing of an electric motorcycle system. In this paper, we present an electric motorcycle system simulation program implemented on Matlab, which can model drivetrain and powertrain systems in an easy, natural way within Simulink and PSAT. And the analysis of design parameters such as max power, capacity, state of charge, slope angle is carried out by the simulation and experimental method. The predicted results by the development model were a good agreement with experimentally obtained results.