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조영건,박세진,윤용산 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.3
The seat is an important element in the ride quality of vehicle, as the seat absorbs shock and vibration transferred to passenger and directly contacts with passenger. The seat is com- posed of frame. coverage, sponge, and so on. Among these parts sponge greatly contributes on vibration characteristics of seat.<br/> This paper describes th experimental results of sponge which has viscoelastic property. The purpose of this paper is to understand the mechanical property of sponge. This paper includes static and dynamic test. The stiffness was measured in static test. Also the dynamic stiffness and damping coefficient were measured by INSTRON 8505 according to frequency. These results were approximated as linear transfer function between force and displacement, then used for simulation<br/>
차량 동역학 시뮬레이션을 위한 도로 변위 및 속도 신호의 생성
조영건(Young-Gun Cho),박세진(Se-Jin Park),윤용산(Yong-San Yoon) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
The road signal is generated by white random noise which is passed through FIR filter according to ISO standard. In addition the road velocity signal is made by the derivative of the displacement signal using cubic spline which has relatively good differential gain and phase. The generated road signal enables tire to have damping characteristics which is sometimes omitted due to the difficulty in generating road velocity profile.