• 한국산학기술학회논문지
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• 제10권5호
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• pp.917-922
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• 2009

본 연구에서는 ISO, MIRA, 그리고 Wong에 의해 제안된 노면 PSD 함수를 기초의 3차원 노면의 생성 방법에 대해 연구하였다. 주어진 노면 거칠기 특성이 PSD 함수를 사용하여 2차원 노면을 생성한 뒤 상관도를 고려하여 횡방향으로 연속적으로 배치함으로써 실제 노면 특성에 유사한 3차원 노면을 생성하였다. 생성된 노면의 상관도를 평가한 결과 실제 노면의 상관도 특성과도 잘 일치함을 확인하였다. 또한, 3차원 노면을 자동으로 생성하기 위하여 반복적으로 횡방향 노면을 생성시켜 주는 프로그램을 개발하였다.

• 한국자동차공학회논문집
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• 제14권6호
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• pp.120-126
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• 2006

Vehicle dynamic simulation has been carried out using the coherence of road roughness between left and right wheels. The generated twin tracks with the coherence of road roughness between left and right wheels are in good agreements with the measured coherence relation of left and right wheels. And these tracks reflect well on the roughness characteristics of real roads. Using the generated roads and multibody dynamic simulation program, vehicle dynamic simulation is performed. The vertical and roll motion analysis of a vehicle are carried out using the realistic road profiles with the coherence between left and right wheels and the results are in good agreements with the dynamic characteristics of a vehicle.

• 한국자동차공학회논문집
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• 제22권4호
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• pp.105-110
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• 2014

This paper presents the hysteresis friction of a sliding elastomer on various types of surfaces. The hysteresis friction is calculated by means of an analytical model which considers the energy spent by the local deformation of the rubber due to surface asperities. By establishing the fractal character of the surfaces, the contribution to rubber friction of roughness at different length scales is accounted for. High resolution surface profilometer is used in order to calculate the main three surface descriptors and the minimal length scale that can contribute to hysteresis friction. The results show that this friction prediction can be used in order to characterize in an elegant manner the surface morphology of various surfaces and to quantify the friction coefficient of sliding rubber as a function of surface roughness, load and speed.