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야지 차량의 기동성 예측을 위한 휠-토양 상호작용 시험장치 개발에 관한 연구
오현환(Hyunhwan. Oh),김관영(Gwanyoung. Kim),김진성(Jinseong Kim),신용재(Yongjae. Shin),이수진(Soojin. Lee) (사)한국CDE학회 2014 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2014 No.8
This paper focuses on the development of wheel-terrain interaction device for predictionof mobility of off-road vehicle. The important variables which have an effect on wheel-terrain interaction are considered. In addition, the design procedure of the test device is introduced, especially for the wheel, the parts to drive the wheel in two directions, and the sensors to measure the variables.
야지 차량의 기동성 예측을 위한 휠-토양 상호작용 시험장치 개발
오현환(Hyunhwan Oh),김관영(Gwanyoung Kim),김진성(Jinseong Kim),신용재(Yongjae Shin),이규진(Kyu-Jin Lee),최민석(Minsuk Choi),이수진(Soo Jin Lee) (사)한국CDE학회 2014 한국CDE학회 논문집 Vol.19 No.4
This paper presents on the development of wheel-terrain interaction device using low-priced sensors, which will be used to predict the drawbar pull and optimal slip of off-road vehicle in real time. The essential variables obtained in the device to predict the mobility of vehicles are determined based on semi-empirical model describing the wheel-terrain interaction. Using the developed device, the experiments about the wheel-terrain interaction were performed on the soil of the Jumunjin standard sand, which yielded dynamic weight, motor driving torque, drawbar pull, and sinkage with respect to wheel slip ratio. Finally, the repeatability of the measured data are verified through repeating the experiments three times on the same condition.
휠-토양 상호작용 분석을 위한 DEM모델 토양 정수 도출
장기찬(Gichan. Jang),오현환(Hyunhwan. Oh),최민석(Minsuk. Choi),이수진(Soojin. Lee),이규진(Kyujin. Lee) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.동계
This study estimated characteristic soil parameters influencing behaviors of wheels on the off-road soil by the DEM(Discrete Element Method) model analysis. Soil deformation at wheel-soil contacts, such as sinkage and slip, affected by soil parameters leads to the significantly increased resistances for the driving wheel. For considering soil conditions in the wheel behavior on the soft ground, conventional wheel-soil models use characteristic soil parameters measured by experimental tests. We developed a virtual soil cone penetration test model with DEM to obtain the vertical reaction forces of the modeled soil and compared the simulation results with test results from an actual cone penetration test with dry Jumunjin sand. Also parametric studies to investigate effects of DEM model parameters, such as Young’s modulus, dynamic friction, rolling friction, particle size, particle density and bulk density, on the characteristic soil parameters were performed.