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허승진(Seung-Jin Heo),이종현(Jong-Hyun Lee),구정서(Jeong-Seo Koo) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
The crushable front part of the conventional TGV is composed of 3 energy absorption zones; retractable coupler, protective headstock and honeycomb structure. This frontal part must absorb about 80% of the energy that should be done in a crashworthy design. The conventional TGV can absorb 2MJ impact energy by the frontal end, but 5MJ is the design target for energy absorption in the next generation TGV. To accomplish this design goal, a new concept of design is necessary for energy absorbing components. In this paper, the design concept of the tube expansion energy absorber will be proposed and analyzed. The crash analysis of the energy absorber are performed by comparing the value of the theoretical equation with the simulation calculated from the commercial nonlinear FE-Code "PAM-CRASH" S/W.
허승진(Seung-Jin Heo),박기홍(Kihong Park),이경수(Kyongsu Yi),나혁민(Hyuck-Min Na),백인호(Inho Paik) 한국자동차공학회 2000 한국 자동차공학회논문집 Vol.8 No.5
The VDC(Vehicie Dynamics Control) is a control system whose target is to improve stability of a vehicle under lateral motion. A lateral vehicle motion, especially on a slippery road, can lead to a hazardous situation, and the situation can even worsen by the driver's inappropriate response. In this paper, two VDC systems, a fuzzy-based controller and an LQR-based controller have been developed. The controllers take as input the yaw rate and the sideslip angle of either body or rear wheel, and they yield the direct yaw moment signal by which the vehicle can gain stability during cornering. Simulations have been conducted to evaluate the performance of the control systems. The results indicated that the controllers can successfully improve vehicle stability under potentially dangerous driving conditions.