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Optimization of the industrial guide-way vehicle to improve the running stability
전갑진,박태원,정성필 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.4
This paper presents an optimization of the industrial guide-way vehicle that aims to improve running stability at increased speeds. A guide-way vehicle was used to transfer products in various manufacturing industries. Using Design Of Experiment(D.O.E.), the design prototype was optimized. The improved design prototype and its design parameters were obtained by a case study determined by the engineering discussion. The computational model for the optimization was validated by correlation with the test results. Through this procedure, the optimization method presented in this paper has been proven to be effective.
전갑진,이수호,정성필,윤지원,박태원 한국자동차공학회 2008 International journal of automotive technology Vol.9 No.6
Air suspension systems have been implemented in various commercial vehicles, such as buses and special purpose trucks, because of the comfortable ride and easy height control. An evaluation of the durability of vehicle parts has been required for service life and safety starting in the early stages of design. The cyclic load applied to the vehicle can cause fatigue failure of parts, such as the suspension frame. This paper presents a method to predict the fatigue life of the suspension frame at the design stage of the air suspension system used in a heavy-duty vehicle. To estimate the fatigue life using the SN method, the Dynamic Stress Time History (DSTH) is necessary for the part of interest. DSTH can be obtained from the results of the flexible body dynamic analysis using the Belgian road simulation and the Modal Stress Recovery (MSR) method. Furthermore, the reliability of the predicted fatigue life can be evaluated by considering the variations in material properties. The probability and distribution of the expected life cycle can be obtained using experimental design with a minimum number of simulations. The advantage of using statistical methods to evaluate the life cycle is the ability to predict replacement time and the probability of failure of mass-produced parts. This paper proposes a rapid and simple method that can be effectively applied to the design of vehicle parts.
다물체 동역학 모델을 이용한 종이컵 성형기용 배럴캠의 마모 인자에 관한 연구
전갑진(Kab-Jin Jun),박태원(Tae-Won Park),정광열(Kwang-Yeil Cheong),김영국(Young-Guk Kim) 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.3
3 차원 캠의 하나인 배럴캠은 자동화 생산 기계에서 인덱스 드라이브 유닛의 부품으로 많이 사용된다. 캠의 회전축과 종동절의 회전축이 90 도의 위상으로 직교한다. 인덱스 드라이브는 일정한 속도로 회전하는 캠의 입력에 대해 회전하고 정지한다. 터렛이 배럴캠의 회전에 의해 작동하는 동안 종이컵이 매우 빠르고 정확하게 성형된다. 그러나, 배럴캠과 종동절사이의 지속적인 미끄럼 접촉에 의해 점착마모가 발생하며 이러한 마모는 시스템의 성능에 영향을 준다. 결과적으로 제품의 불량율을 증가시킨다. 본 연구에서는 종이컵 성형기에 사용되는 배럴캠의 마모에 영향을 주는 인자가 접촉력임을 확인한다. 배럴캠과 롤러 사이의 접촉력은 다물체 동역학 모델을 이용해 계산한다. 그리고 해석 결과와 실제 시스템의 마모부와 비교를 통해 중요 마모 인자가 접촉력임을 검증한다. The barrel cam, which is a type of cylindrical cam, has been widely used as a part of index drive units for automatic manufacturing machines. The axis of rotation of the barrel cam is orthogonal to the axis of rotation of the follower. The index drive rotates or dwellsdepending on the cam profile, while the cam rotates with a constant velocity. Continuous sliding contact between the barrel cam and the follower surfaces causes wearing of the adhesive between them. This study shows that the contact force between two sliding bodies is responsible for the wear of the barrel cam in the paper-cup-forming machine. This contact force is calculated by using the multibody dynamics model of the paper-cup-forming machine. The analytical result is validated by comparing it to the actual wear spots on the real product.
Crank Angle 속도 변화와 IMEP 상관성 및 Individual Spark 제어를 통한 Idle Stability 개선
전갑진(JEON KAPJIN),이윤석(LEE YUNSEOK),이재호(LEE JAEHO),윤종석(YOON JONGSUK) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Idle stability is closely related to engine combustion variability which is represented by the coefficient of variation in idle indicated mean effective pressure(IMEP). IMEP is derived from measured cylinder pressure. This paper describes the correlation between crank angular velocity and COV_IMEP. Based on the correlation, engine roughness value has been used in idle stability to minimize cylinder to cylinder combustion variability by the optimized individual spark control.
COM 기반 프로그램 맞춤을 이용한 설계자 전용 해석 애플릿 개발
전갑진(Kab-Jin Jun),박태원(Tae-Won Park),박찬승(Chan-Seung Park),전용호(Yong-Ho Jeon),최성훈(Seong-Hoon Choi),김정범(Jung-Bum Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Many designers have difficulty to use the existing commercial program because of their complicated and numerous functions. This problem causes that the engineer spend more time to learn the commercial program than the actual design. Therefore, it’s very necessary a program which focused on the designer’s convenience. This paper presents that the development of an applet for designers customizing the existing COM(Component Object Model) based program. The COM component is so excellent in reusability and expandability. Therefore, the development can be easily applied to various requirements. The applet represented in this study can be effective to the designers by simplifying the user interface and analysis procedure.
전갑진(Kab-Jin Jun),박태원(Tae-Won Park),이수호(Su-Ho Lee),윤지원(Ji-Won Yoon),권순기(Soon-Ki Kwon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The air suspension system is widely used in commercial vehicles such as buses or special purpose trucks because it improves ride better than any other types of suspension. Since the durability of vehicle parts is directly related to the safety, the evaluation of the durability at the design state is necessary. In this research, the fatigue life of the air suspension frame for trucks is predicted by the modal stress recovery(MSR) method. Using the process proposed in this research, the fatigue life of vehicle parts can be predicted efficiently at the design stage.