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A MATHEMATICAL MODEL OF A POWER STEERING SYSTEM
장봉춘(B.C.Jang),이성철(S.C.Lee),D.A.Guenther(D.A.Guenther) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
The focus of this research is to set up and describe the mathematical derivation of an automobile power-assisted rack and pinion steering system dynamics. The mathematical model of the power steering system dynamics with a 5 degree-of-freedom linear vehicle model will be used in the computer simulation and evaluated comparing with the experimental results. This model is flexible to accommodate different vehicles through simple parameter changes. The developed mathematical model will attempt to provide enhanced driver realism to a Systems Technology, Inc. driving SIMulator (STISIM).
A Linear Vehicle Model with Nonlinear Power Steering System and Tire Model
장봉춘(B.C.Jang),임양남(Y.N.Lim),노덕수(D.S.Roh),이성철(S.C.Lee) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
This research describes a combination of a linear vehicle handling model and a nonlinear tire model. The first section describes the power steering system dynamics and a 5 D.O.F. vehicle handling model. The second section of this paper presents a nonlinear tire model. Comparing the results from the combination of the power steering system model and a linear vehicle handling model and those from the combination of the power steering system. a linear vehicle handling model and a nonlinear tire model with the experimental data, this vehicle handling model with a nonlinear tire model will be better understood at higher lateral acceleration maneuvers. Thus. this vehicle handling model with a nonlinear tire model will attempt to provide enhanced driver realism to a STI driving simulator.<br/> <br/>
ROLLOVER SIMULATION OF SPORTS UTILITY VEHICLES
M. RAM PRABHU(M. RAM PRABHU),N.S. ANDRES(N.S. ANDRES),엄용균(Y.G. Eom),장봉춘(B.C. JANG) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
The simulations on dynamic stability of Sports Utility Vehicles using Carsim/Vehsim software are presented on this paper with the aim of studying the rollover process occurring in such vehicles. Carsim/Vehsim is an integrated simulation package that has been developed for chassis dynamics controls and integration. The simulation procedure makes use of dynamic testing maneuvers (Fishhook tests, J-Turn test and Double Lane Change test) recommended by NHTSA to evaluate the antirollover propensities of SUVs on road. The simulation results emphasize the need for better understanding of SUV rollover performance and characteristics that are very essential in enhancing vehicle design. Furthermore, the simulation dramatically shows less development time and cost reduction compared to field testing. This paper, in general, investigates the dynamic rollover characteristics of 4 SUVs in 2 different road conditions.