• 연구논문집
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• 통권24호
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• pp.97-106
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• 1994

Steering system is typically one of the vehicle parts that may injure an unrestrained driver in a frontal collision. Therefore, the engineers of vehicle safety parts researched the allowable injury criteria such as HIC(head injury criterion). chest acceleration and knee impact force. From their research, they recognized that development of energy absorbing steering system was necessary to protect the driver. Energy absorbing parts of steering system consist of shear capsule, ball sleeve and shaft assembly. We performed the modelling and dynamic analysis of the energy absorbing steering column with the unrestrained driver model. The conclusions of this study are as follows. 1) The variation of column angle has an important effects on the dynamic responses of steering system and driver behavior. 2) The energy absorbing steering system satisfies the safety criterion of FMVSS 203, 208, but not the safety criterion of FMVSS 204.

• 한국안전학회지
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• 제27권5호
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• pp.211-218
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• 2012

Two experiment are planed to identify driver's safe driving behaviour by curve radius, road surface condition in curve section. At four-lane and two-lane road, conducted experiments are check on driver's feeling of safety that 30 subjects do not feel discomfort. And using the data from these experiments, this study compare physical speed (not slipping, fall our of the road) with safety driving speed(drivers felt a comfortable and safe speed) each curve radius and fiver road surface condition(drying, wet, rain, snow and ice). As a result, safe driving behaviour factors that are derived to curve radius of 100m units, five road surface conditions enable to represent quantitative analysis of driver's discomfort. This study will develop road design method and evaluation reflected ergonomic aspects.

• 융합정보논문지
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• 제11권4호
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• pp.161-167
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• 2021

본 연구는 노인운전자의 운전능력을 선별하는 검사로서 이중과제가 활용될 수 있는지 확인하고자 노인운전자의 이중과제 수행과 운전 행동간의 상관관계를 알아보았다. 총 32명의 정상 노인운전자를 대상으로 일반적 정보 및 운전 관련 정보를 조사하고 이중과제 수행정도를 알아보기 위하여 Y-DuCog(Yonsei-Dual task Cognitive screening test)를 평가하였다. 운전행동 수준은 K-DBQ(Korean-Driving Behavior Questionnaire)설문을 사용하였다. 연구결과 페그꽂기 과제와 동물이름 말하기를 활용한 이중과제 수행이 K-DBQ의 위반영역의 점수와 유의미한 상관관계를 보였다. 본 연구로 운전능력 선별검사로서 이중과제의 가능성을 확인할 수 있었다.

• 대한안전경영과학회지
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• 제20권2호
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• pp.1-8
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• 2018

This study aims to provide a real-time information to the driver by effectively operating the advanced safety device attached to the freight vehicle, thereby minimizing insecure behavior of the driver such as speeding, rapid acceleration, sudden braking, And improve driving habits to prevent accidents and save energy. Advanced safety equipment is a device that warns the driver that the vehicle leaves the driving lane regardless of the intention of the driver and reduces the risk of traffic accidents by mitigating or avoiding collision by detecting a frontal collision during driving.The main contents of this report are as follows: In case of installing a warning device on a lane departing vehicle (excluding a light vehicle) and a lorry or special vehicle with a total weight exceeding 3.5 tonnes, the driver must continue to operate unless the driver releases the function.In addition, when the automatic emergency braking system is installed, the structure should be such that the braking device is operated automatically after warning the driver when the risk of collision with the running or stopped vehicle in the same direction is detected in front of the driving lane.

• 대한토목학회논문집
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• 제28권1D호
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• pp.11-19
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• 2008

현재 첨단차량 분야의 기본 기술 중 기 개발된 추종모형은 운전자 및 운행 환경적 요소 등을 배제하고 오직 두 차량사이의 물리적 상관관계에 의해서만 거동하도록 개발되어져 있다. 그러나 추종거동의 현실적 적용을 위해서는 차량 운전자의 특성 및 운행 환경적 요소의 적용이 필수적이다. 따라서 본 논문에서는 보다 현실적용이 용이한 추종모형의 개발을 위한 선행연구로서 차량 운전자가 주행 중 느끼는 불안감의 정도를 산정하기 위한 방법을 제시하고자 하였다. 운전자의 불안감도(Measure of Alarmness ; MOA)는 유비쿼터스 교통 하에서 첨단차량이 추종거동을 하고 있을 때 추종차량과 선행차량 간의 상대적 관계 및 환경적 요인과 운전자의 특성에 의해 측정되는 수치이다. 운전자 MOA의 일반적이고 객관적인 측정을 위하여 운전자 불안감도에 대한 설문조사를 수행하고 이를 바탕으로 MOA 측정 퍼지로직모형을 구축하였다. 시나리오에 의해 정의된 입력값으로 MOA를 산정하여 구축한 퍼지로직모형의 타당성을 입증하였으며, 본 논문의 결과는 주행 중 관여하는 여러 가지 요소에 따라 추종상태에서 느끼는 운전자의 불안감도를 정량적으로 측정함으로서 기존의 추종거동모형을 보다 현실화시키기 위한 기틀을 마련하였다. 이러한 불안감도는 운전자의 주행 중 안전성과 안락함을 평가하는데 주요한 척도로 적용될 것으로 사료된다.

• 한국컴퓨터정보학회논문지
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• 제22권8호
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• pp.33-39
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• 2017

In this paper, we propose a method which implements warning to drivers through real-time analysis of risky and unexpected driver and vehicle behavior using only a smartphone without using data from digital tachograph and vehicle internal sensors. We performed the evaluation of our system that demonstrates the effectiveness and usefulness of our method for risky and unexpected driver and vehicle behavior using three information such as vehicle speed, azimuth and GPS data which are acquired from a smartphone sensors. We confirmed the results and developed the smartphone application for validate and conducted simulation using actual driving data. This novel functionality of the smartphone application enhances drivers' situational awareness, increasing safety and effectiveness of driving.

• 오토저널
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• 제12권6호
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• pp.30-39
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• 1990

The behavior of a V-belt CVT was investigated both analytically and experimentally. It was found that as the torque load increased, the belt radial displacement increased in inward radial direction for the driven pulley while the radial displacement decreased slightly and increased for the driver pulley. The relative belt displacement for the driver was negligible compared with that of the driven. The experimental results were in good accordance with the theoretical results except for the inlet and exit region of the pulley. The speed ratio-torque load-axial force relationship derived from the belt behavior analysis also showed good agreement with the experiment. It is suggested that the results of this paper can be used as basic design informations of a V-belt CVT.

• 대한안전경영과학회지
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• 제19권4호
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• pp.105-113
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• 2017

This study highlights the theme of safety leadership in railway organization, conducting empirical analysis on the relationship between safety climates, safety leadership, safety behavior, and accident. The empirical test results based on questionnaires received from 223 train drivers working at A subway firm indicated that relationship between CEO's safety philosophy, and safety communication showed a significant positive effect on boss's safety leadership. And boss's safety leadership showed a positive influence on observation belonging to safety behavior, which in turn showed a significant negative relationship with mistake. However, mistake, observation and violation were shown that there are no relationship with accidents.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2019년도 제59차 동계학술대회논문집 27권1호
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• pp.451-453
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• 2019

본 논문에서는 주행 중 안전운전에 영향을 미칠 수 있는 운전자의 행동을 찾아 분석한 뒤 세분화 하여 분류하고, 주의분산을 유발하는 운전자의 운전행동 구분을 바탕으로 차량을 주행함에 있어 위험요소를 찾아내도록 한다. 이를 통해 향후 자동차사고를 줄이기 위한 제도개선 및 문제점 보완에 기여할 수 있다. 운전 중 운전자의 주의분산을 유발하는 디바이스가 늘어나는 상황에서 본 논문의 분석결과는 운전자의 필수적이지 않은 위험행동을 줄이도록 유도하는 방안을 모색할 수 있다.

• 한국자동차공학회논문집
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• 제16권1호
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• pp.71-77
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• 2008

This paper proposes an Electronic Throttle Body (ETB) model considering a non-linearity of DC motor driver which is integrated with a H-bridge and a gate driver. A propagation delay and reverse recovery time of switching components cause non-linear characteristic of DC motor driver. This non-linearity affects not only the amateur voltage of DC motor, but also entire behaviour and parameters of ETB. In order to analyze the behavior of ETB more accurately, this non-linear effect of DC motor driver is modeled. The developed ETB model is validated by use of the step response and ramp response experiments, and it shows relatively accurate results compared with linear DC motor driver model.