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박대준(Daejun Park),배대성(Daesung Bae),조희제(Huije Cho),전효찬(Hyochan Jun),정종덕(Jongduk Jung),편장식(Jangsik Pyun) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Collector is equipment that supply electrical energy to a subway train. Generally, there are collectors at top of an urban railway vehicle because of electrical wire. But some urban railway vehicles have collectors at bottom of the bogie to receive energy from the wire beside of a rail. This is a system that the collectors contact with a rail. For this reason, the device has a strong influence on safety of the vehicle. This study shows examination of a collector using simulation program. DAFUL is a software to analyze Multi Body Dynamic system. Dynamic model is composed of joints, springs, and contact. Motion function enables the model to move by simulation. After these process, examination of collector is possible. The simulation model would be useful to analyze similar system.
다중 강체를 이용한 토크컨버터 댐퍼 스프링의 동적 히스테리시스에 관한 연구
박규진(Gyujin Park),배대성(Daesung Bae),김진문(Jinmoon Kim),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
The Lock-up clutch of a torque converter directly transmits the engine power to the transmission in order to achieve a more fuel economy. Damper spring, a core part of lock-up clutch system, makes the powertrain system stabilized by reducing the fluctuation torque of any engine system when lock-up clutch is operated. In addition, this part helps the improvement of total vehicle systems by increasing spring characteristic in aspects of the design facilities. To analysis the dynamic hysteresis of damper springs, numerical simulation has been carried out using Damper Analysis Toolkit made by OPEN API module in DAFUL. Preliminary test has also been conducted to assess the dynamic behavior of damper springs. The results of analysis and test are discussed in view of the dynamic simulation of damper springs. The maximum relative errors between numerical analysis and test was 8.2% except a critical point such as a return point of damper spring.
박규진(Gyujin Park),배대성(Daesung Bae),김명식(Myungsik Kim),장재덕(Jaeduk Jang),주인식(Insik Joo) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Lock-up clutch of a torque converter in an automatic transmission directly transmits the engine power to the transmission in order to achieve a more fuel economy. Damper spring, a core part of lock-up clutch system, makes the powertrain system stabilized by reducing the fluctuation torque of any engine system when lock-up clutch is operated. In addition to that, this part helps the improvement of total vehicle systems by increasing spring characteristic in aspects of the design facilities. To analysis the dynamic hysteresis of damper springs, numerical simulation has been carried out using DAFUL, a dynamic analysis commercial code. Preliminary test has also been conducted to assess the dynamic behavior of damper springs. The results of analysis and test are discussed in view of the dynamic simulation of damper springs.
다물체 동역학을 이용한 해상 풍력 발전 구조 해석 기법 개발
오재원(Jaewon Oh),배대성(Daesung Bae),조희제(Huije Cho),임채환(Chaewhan Rim),송진섭(Jinseop Song) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Dynamics analysis of a floating wind turbine system is coupled with aero-elastic dynamics, hydro dynamics, multi body dynamics and control system. The aero-elastic dynamics code has been developed by NREL(National Renewable Energy Laboratory, USA). The hydro dynamics code has been developed by KIMM(Korea Institute of Machinery & Materials) and SNU(Seoul National University). Those codes have been merged on the commercial multi-body dynamics software of DAFUL made in VM(Virtual Motion). A wind turbine system consists of blade, hub, power train, nacelle, tower, platform, mooring. The blade and tower are modeled as multi-body system to apply an aero force and elastic force. Pitch and generator torque are controlled with PID controller. Added mass, damping, restoring, mooring and buoyancy forces are applied on the platform. This analysis method is verified by NREL OC3 model and FAST, developed in NREL. As a result, the two results agree well enough to verify the reliability.
발사 시스템의 동역학 해석을 위한 수치해석 프로그램 개발
채애경(Aekyung Chae),배대성(Daesung Bae),전혁수(Hyucksoo Jeon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
In the initial stage of guided missile launching, the dynamic stability of a missile is highly influenced by disturbances from the outside and interferences among the launching system parts. This research develops a program for guided missile launching system analysis. Random variables are used to analyze quantitatively the missile characteristic response. An example of results with the program applied into a specific System is presented to demonstrate the effectiveness of the propose method.
발사 시스템의 동역학 해석을 위한 수치해석 프로그램 개발
채애경(Aekyung Chae),배대성(Daesung Bae),전혁수(Hyucksoo Jeon) 대한기계학회 2008 大韓機械學會論文集A Vol.32 No.12
In the initial stage of guided missile launching, the dynamic stability of a missile is highly influenced by disturbances from the outside and interferences among the launching system parts. This research develops a program for guided missile launching system analysis. Random variables are used to analyze quantitatively the missile characteristic response. An example of results with the program applied into a specific System is presented to demonstrate the effectiveness of the propose method.