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신헌섭(Yoon-Sik Jung),정윤식(Heon-Seop Shin),심도식(Do-Sik Shim),임성수(Sungsoo Rhim) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In order to improve the energy efficiency and the ride quality of the electric vehicle it is highly desirable to develope a light-weight suspension system with high travle ratio (which is the ratio of the fully extended length to the fully compressed length of the suspension). Air suspension systems with rubber tube are often considered as the optimal answer for such requirements. In this paper, a new light-weight air suspension system with high travel ratio is developed for the use in the electric vehicle. Also a FE-based multi-flexible-body dynamics (MFBD) model of the suspension system is developed as a tool for the design improvement of actual suspension system. The MFBD model includes the FE modeling of the rubber tube module as well as other essential parts of the air suspension system. The system parameters for the model were obtained from various experiments. The validity of the developed MFBD model has been shown by the comparison between the experimental results and the simulation results.
정윤식(Yoon-Sik Jung),신헌섭(Heon-Seop Shin),임성수(Sungsoo Rhim),최진환(Jin-Hwan Choi) 대한기계학회 2013 大韓機械學會論文集A Vol.37 No.8
현재 전기자동차의 높은 에너지 효율 및 승차감을 모두 만족시키기 위해 경량 서스펜션 개발에 많은 초점이 맞추어 지고 있다. 개발되고 있는 경량 서스펜션중 rubber tube로 만들어진 에어서스펜션이 에너지효율 및 승차감을 만족시킨다고 평가 받고 있다. 본 논문에서는 높은 전장비의 특징을 가지는 전기자동차용 에어서스펜션을 개발하였다. 또한 실제 에어서스펜션의 성능 향상 연구를 위해 유연 다물체 동역학 모델(MFBD) 방법을 이용하여 모델링하였고, 에어서스펜션에서 중요한 역할을 하는 rubber tube의 경우는 FE기법을 통해 모델링 하였다. 에어서스펜션의 각 모듈 특성을 고려하여 모듈별 물성실험을 진행 및 물성치를 추정하였다. MFBD모델의 신뢰성 확인을 위해 물성치를 적용시킨 시뮬레이션 결과와 실제 실험결과를 비교하였다. To improve the energy efficiency and ride quality of an electric vehicle, it is highly desirable to develop a lightweight suspension system with high travel ratio. Air suspension systems with a rubber tube are often considered optimal for such requirements. In this study, a new lightweight air suspension system with high travel ratio was developed for use in electric vehicles. Furthermore, an FE-based multi-flexible-body dynamics (MFBD) model of the suspension system was developed as a tool for improving the design of an actual suspension system. The MFBD model includes the FE modeling of the rubber tube module as well as other essential parts of the air suspension system. The system parameters for the model were obtained from various experiments. The validity of the developed MFBD model was shown through a comparison between the experimental results and the simulation results.