• 제목/요약/키워드: Proving Ground

검색결과 108건 처리시간 0.029초

3차원 차량모델을 이용한 자동차 주행거동의 컴퓨터 시뮬레이션 (Computer Simulations of 4-Wheeled Vehicle Manoeuvres Using a 3-Dimensional Double-Track Vehicle Model)

  • 최영휴;이재형;이장무
    • 한국자동차공학회논문집
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    • 제3권3호
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    • pp.97-108
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    • 1995
  • A 3-dimensional double track vehicle model, that has 12-degress-of-freedom, was proposed to analyze handling and riding behaviours of an automotive car. Nonlinear characteristics of the suspension and steering systems of the vehicle model were considered in its equations of motion, which were solved by using the 4th-order Runge-Kutta integration method. Computer simulations for lane change, steady-state handling, and running-over-bump manoeuvres were made and verified by vehicle tests on proving ground. The computed results of the proposed model showed better agreement with test results than those of the conventional 2-dimensional single track model did. Especially they showed good accuracy near the characteristic speed and in high lateral accelerated manoeuvres.

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표면 종단면 형상 감지 알고리즘을 이용한 노면 해석 시스템 (Road measuring system using surface profile sensing algorithm)

  • 김효준
    • 한국산학기술학회논문지
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    • 제12권3호
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    • pp.1098-1104
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    • 2011
  • 본 연구에서는 주행하는 차량에서 관심 도로면의 형상을 재현할 수 있는 시스템을 제안하였다. 차체에 부착된 센서로부터 측정된 신호에 혼입된 차량의 동적 거동 영향을 배제하고 형상 정보를 재현할 수 있는 멀티 센서 시스템을 적용하였고, Lab 실험을 수행하여 센서부에 인가되는 동적 외란에 대해서도 강건한 성능을 검증하였다. 실제차량에 시스템을 구현하여 다양한 도로면에 대한 검증 실험을 수행하였으며 해석적 노면 모델과의 비교를 통하여 그 효용성을 제시하였다.

EPS 제어시스템 장착 승용차의 통합적 시뮬레이션 기법 연구 (Simulation Integration Technique of a Full Vehicle Equipped with EPS Control System)

  • 장봉춘;소상균
    • 한국정밀공학회지
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    • 제23권6호
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    • pp.72-80
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    • 2006
  • Electric Power Steering (EPS) mechanism has become widely equipped in passenger vehicle due to the increasing environmental concerns and higher fuel efficiency. This paper describes the development of concurrent simulation technique and simulation integration technique of EPS control system with a dynamic vehicle system. A full vehicle model interacting with EPS control algorithm was concurrently simulated on a single bump road condition. The dynamic responses of vehicle chassis and steering system resulting from road surface impact were evaluated and compared with proving ground experimental data. The comparisons show reasonable agreement on tie-rod load, rack displacement, steering wheel torque and tire center acceleration. This concurrent simulation capability was employed fur EPS performance evaluation and calibration as well as for vehicle handling performance integration and synthesis.

ADSL 기반의 원격 진료의 구현 (Realization of ADSL Based Tele-medicine)

  • 김천석;조의주;한경희;최영선
    • 한국정보통신학회논문지
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    • 제5권6호
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    • pp.1062-1065
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    • 2001
  • 인터넷환경의 눈부신 발전으로 세계에서 가장 인터넷 망이 잘 갖추어진 우리나라가 다양한 넷트웍 환경의 실험장이 되어 있고 세계에서 가장 논은 초고속망이 보급 되여 있다. 본 논문에서는 각 가정에 연결 되여 있는 초고속망(ADSL)을 이용하여 병원의 의사컴퓨터와 1:1로 접속하여 혈압과 맥박, 체온, 혈당, 화상청진기, 음성 등을 종합적으로 실시간 전송하는 원격진료 시스템을 구현하였다.

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GPS 유도 폭탄용 유도조종모듈 개발 (Development of Guidance Control Module for GPS Guided Bomb)

  • 임흥식;윤형식
    • 한국군사과학기술학회지
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    • 제14권5호
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    • pp.774-780
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    • 2011
  • The guidance control module is needed for control of a GPS guided bombs to improve the accuracy and availability of a conventional bomb. In this paper, we present the development of hardware design, software design and test environments of it. And we also show the process of the tests and the results verifying and proving for its required functions and performances through ground tests and flight tests.

Plasma Membrane Transporters for Lead and Cadmium

  • Bressler Joseph P.;Olivi Luisa;Cheong Jae Hoon;Kim Yongbae;Bannon Desmond
    • 한국응용약물학회:학술대회논문집
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    • 한국응용약물학회 2004년도 Annual Meeting of the Korean Society ofApplied Pharmacology
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    • pp.50-61
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    • 2004
  • Lead and cadmium are potent environmental toxicants that affect populations living in Europe, Americas, and Asia. Identifying transporters for lead and cadmium could potentially 1 help us better understand possible risk factors. The iron transporter divalent metal transporter 1(DMT1) mediates intestinal transport of cadmium, and lead in yeast and fibroblasts overexpressing DMT1. In human intestinal cells knocking down expression of DMT1 attenuated uptake of cadmium and iron but not lead. A possible explanation is the expression of a second transporter for lead in intestine. In astrocytes, however, DMT1 appears to transport lead in an extracellular buffer at pH value. At neutral pH, transport was not mediated by DMT1 but rather by a transporter that is stimulated by bicarbonate and inhibited by 4,4'-diisothiocyanatodihydrostilbene-2,2'-disulfonic acid. The identity of this lead transporter is under study.

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윈도우즈 GUI 환경을 이용한 자동차의 주행성능 측정.분석용 CAT 시스템의 개발 (Development of a CAT System for Measuring and Analysing the Ride and Handling Performances of Vehicle under Windows GUI Environment)

  • 양희구;김석일;김동룡;김건상
    • 한국자동차공학회논문집
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    • 제5권4호
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    • pp.21-28
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    • 1997
  • The vehicle handling performances have a close relation with the driver's safety. And the CAT(Computer aided testing) system has been introduced as a powerful tool for improving the handling performances. In this study, a CAT system for effectively measuring and analysing the handling performances is developed based on the windows GUI(Graphic user interface) environment. Especially, in order to derive a lot of significant handling performance parameters from a series of proving ground tests, the CAT system has various functions related to real time measurement, time domain analysis, frequency domain analysis, steady state analysis and so on.

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차체 저항 점 용접부 피로수명 예측 (Estimation of Fatigue Strength in Resistance Spot Weldment of the Vehicle Body)

  • 손광재;양영수;조성규;장상균
    • Journal of Welding and Joining
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    • 제20권2호
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    • pp.59-64
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    • 2002
  • When the vehicle travels in an actual road, resistance spot weldments of the vehicle structure are exposed to complex loading state. Since the fatigue strength in resistance spot weldment of vehicle body can be determined by effect of residual stresses and loading state of driving, estimating actual loading state and considering residual stress effect are needed. In this study, Fatigue stress-fatigue life relation concerned residual stress effect was obtained by thermo elastic plastic finite element analysis. And applied loading in resistance spot weldments of vehicle body was calculated by dynamic analysis. Presumption of fatigue life was performed using proposed method

ADAMS를 이용한 다축 시뮬레이터에 관한 연구 (A Study on Multi-Axiles using ADAMS)

  • 정찬범;유승환;이경백;김영배
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2001년도 춘계학술대회 논문집
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    • pp.288-291
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    • 2001
  • Vehicle evaluation is performed on the proving ground, and durability test and dynamic test cost lots of money and time. Doing replace real vehicle experiment with similar experiment environment, it will take us much more useful advantages. Suspension simulator is required the robust and high-reliability and used widely. But it's natural of high-leveled control technique to manage to be fitted fluid system's property and complex that is for the lack of self-damping, nonlinearity, compressibility. In designing and evaluating simulator, it is important to understand the capability of kinematic and static performances. In this paper, an kinematic modeling and analysis has been presented using ADAMS to design that can reproduce longitudinal, lateral, and vertical force.

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비포장 노면의 가혹도 관리에 관한 연구 (A Study on the Severity Control of Unpaved Test Courses)

  • 양진생;구상화;이정환;강도경;이상호
    • 한국정밀공학회지
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    • 제24권2호
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    • pp.47-57
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    • 2007
  • The vibration environment essentially companied by vehicle operation on the road is determined by the shape of road surface, which is called profile. In general, the profile and severity of unpaved road is an important issue in the reliability of durability test for vehicles. In order to maintain severity of unpaved road, it is necessary to develop profilometer system. We developed profilometer system which is composed of data processing computer, power unit, air compressor and sensors. This paper focuses on the severity management of unpaved test courses using neural networks. This paper presents the maintenance range for cross-country course in CPG(Chang-won Proving Ground) and the evaluation of similarity degree between unpaved roads.