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타이어 특성인자에 따른 차량 전복 동특성 해석에 관한 연구
권성진(Seong-Jin Kwon),김찬중(Chan-Jung Kim),배철용(Chul-Yong Bae),이봉현(Bong-Hyun Lee),구태윤(Tae-Yun Koo),조춘택(Choon-Tack Cho) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Single vehicle accidents sometimes lead to vehicle rollover. Rollover is defined as a vehicle rotation of 90 degree or more around its longitudinal axis. In this paper, the multi-body vehicle dynamic model has been constructed to investigate vehicle rollover propensity. The vehicle dynamic model consisted of body, suspension, steering, power-train, brake, tire, road, and driver subsystems. The whole vehicle parameters, each vehicle's part parameter, part connecting elements such as spring, damper and bush, and tire characteristic factors were measured by an experiment to accomplish accurate rollover analysis. With the developed vehicle dynamic model, rollover characteristic analysis due to tire characteristic factors, such as cornering stiffness and cornering force peak has been carried out.
ACC 차량의 동특성 해석을 위한 VR 시뮬레이션 시스템 개발
권성진(Seong-Jin Kwon),장석(Suk Jang),윤경환(Kyoung-Han Yoon),서명원(Myung-Won Suh) 한국자동차공학회 2004 한국 자동차공학회논문집 Vol.12 No.4
Nowadays, to analyze the dynamic characteristics of the automotive driving system, the computer simulation linked up with VR(Virtual Reality) technology is treated as the useful method with the improvement of computing ability. In this paper, the VR simulation system has been developed to investigate the driving characteristics of the ASV( Advanced Safety Vehicle) equipped with an ACC( Adaptive Cruise Control) system. For the purpose, VR environment which generates 3D graphic and sound information of the vehicle, the road, the facilities, and the terrain has been organized for the driving reality. Mathematical models of vehicle dynamic analysis including the ACC model have been constructed for computer simulation. The ACC modulates the throttle and brake functions to regulate the vehicle speed so that vehicles could keep proper spacing. Also, the real-time simulation algorithm synchronizes vehicle dynamic simulation with the graphic rendering. With the developed VR simulation system, simple scenarios are applied to analyze the dynamic characteristics. It is shown that the VR simulation system could be useful to evaluate the adaptive cruise controlled vehicle on various driving conditions.
권성진(Seong-Jin Kwon),Takehiko Fujioka,조기용(Ki-Yong Cho),서명원(Myung-Won Suh) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, AVCS (Advanced Vehicle Control Systems) and AHS (Automated Highway Systems) for ITS (Intelligent Transport Systems) have been rapidly developed. Above all, the autonomous driving system enables a vehicle to be controlled automatically instead of the human driver's operation. However, we still have stability problems under the effect of the disturbances and the perturbations to the control plant model. In this paper, the model-matching control in longitudinal and lateral autonomous driving is investigated by vehicle dynamics simulation. The model-matching controller is constructed with 2 degrees of freedom controller to design the robust characteristics of the control plant model. For this purpose, the vehicle dynamic models including the model-matching controller are constructed for computer simulation. Simple examples are applied to check the validity of the model-matching control. As the practical example, the autonomous driving system is adopted. It is shown that the model-matching control can make the various characteristics of autonomous driving vehicles to be equivalent to those of a specific transfer function which is suggested as the reference model even if the parameters of the control plant model are changed.