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K&C Test data를 활용한 조향축 지오메트리 계산
박평화(Pyeong Hwa Park),나상도(Sang Do Na),김도균,이종식(Jong Sik Lee) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
Steering axis geometry is important thing in the vehicle handling and steering performances. And that information is necessary to make vehicle simulation model. Unfortunately in order to secure the steering axis geometry information, we need to suspension hardpoint data. In addition to, in case of multilink suspension, even if we have hardpoint data we can’t calculate steering axis geometry directly. This paper calculates steering axis geometry by using screw axis theory and K&C data. And verify by comparison with the ADAMS/Car simulation result and apply to K&C Test data which created by MTS K&C test system.
현가장치의 롤 커플링 영향을 포함하는 함수형 현가장치에 의한 차량동역학 모델 개발
김상섭(Sang sup Kim),박평화(Pyeong hwa Park) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper presents an enhanced modeling method for functional suspension model (FSM). In the convention FSM the relative displacements and orientation of a wheel with respect to car body are represented as a function of the parallel stroke and right and left wheel. Even for independent suspensions the wheel alignment characteristics are different for ride and roll stroke of the wheel due to roll coupling effects. In this paper a new functional suspension model is proposed as kinematic describing functions that include roll correction terms. The equations of motion for 5 body full vehicle dynamics model are systematically derived using velocity transformation method in ODE form. The comparison of the dynamic simulation results of ADAMS/Car model and the current FSM show close correlation and demonstrate the validity of the proposed method.
다물체 탄성기구학 해석에 의한 서스펜션의 누적공차 분석
김상균(Sang Kyun Kim),박평화(Pyeong Hwa Park),김상섭(Sang Sup Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Tolerance design of vehicle suspensions is an important factor that affects the ride and handling quality and cost of the vehicle. This paper presents a method for tolerance analysis of wheel alignment of vehicle suspension. Monte Carlo simulation method is applied to multibody elasto-kinematic model to analyze the accumulated tolerances of wheel alignment. This paper also presents an efficient modeling and analysis method for elasto-kinematic model of vehicle suspensions by computing the stiffness matrix analytically. The simulation results of a Macpherson Strut demonstrates the validity and accuracy of the proposed method.