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승용차용 현가시스템의 동하중 저감을 위한 다중 목적함수 최적설계
김용연(YongYun Kim),허승진(SeungJin Heo),김민수(Min-Soo Kim),전인기(InKi Jun),최재민(JaeMin Choil) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, a virtual simulation is conducted using the Virtual Proving Ground. The roads used in the simulation are Belgian roads and single lane roads. These two particular roads are simulated using the VPG technique. Through the simulation, the dynamic load on each component is estimated, and means by which the estimated dynamic load can be decreased is determined. At the time of optimum designing such as this, many objective functions may exist, therefore, multi objective function technique is used for the optimum design. Also, by evaluating the control stability of the model with optimum design and the existing model, the control stability performance of the optimum design model was verified.
VPG 기법 개발을 위한 특수로 주행 시험 및 시뮬레이션
손성효(Sunghyo Son),김용연(Yongyun Kim),허승진(SeungJin Heo),계경태(Gyungtae Kye),윤중흠(Junghm Yoon) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
As an effort to enhance of the durability and breakdown performance of vehicle suspension system, multi-body dynamics has been applied into simulation and design recently. But because of the difficulties of construction of road profile and tire model, VPG(Virtual Proving Ground) simulation using those rarely has been studied. Instead of VPG simulation, a simulation with an idea based on VTL(Virtual Testing Lab) inputting forces into wheel center directly has been the main current in this area. This study shows a new approach to use tire model and road profile to make a simulation of VPG rather than VTL. For VPG simulation 2-dimensional road profiles of some special roads like weak pot-hole road and washboard road are measured and F-tire model for durability analysis was created. And as VTL simulation does, multi-body vehicle model composed by rigid body and linear/nonlinear force elements was used in this study. For validation of simulation results not only wheel forces but various signals of suspension components using strain gage were measured with road profile simultaneously. Using this VPG method it is expected to calculate the transferred forces to suspension system without wheel force signals and to define more accurate max-impact force levels to suspension components in early stage of design process.