• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2022.10a
• /
• pp.161-163
• /
• 2022

In spite of the recent enforcement of policies to reduce traffic accidents, pedestrian safety accidents on the back road continue to occur. In this paper, we propose a device design to prevent traffic accidents capable of measuring distance and wireless communication to quickly notify pedestrians of the vehicle's approach in a safety blind spot. The accuracy of vehicle and pedestrian distance measurement was tested using ultrasonic and radar sensors with a wide sensing range, and the possibility of responding to accidents that could provide safety for pedestrians in emergency situations was verified through a wireless communication connectivity test between target boards.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2013.04a
• /
• pp.95-95
• /
• 2013

• Journal of Korean Society of Transportation
• /
• v.24 no.3 s.89
• /
• pp.95-102
• /
• 2006

This study develops a methodology on how to assess the traffic safety benefit of advanced vehicular technology for Protecting pedestrian in pedestrian-vehicle collision. Safety benefit is defined here as the reduction of Pedestrian fatality by employing advanced vehicular technology. As an application of the proposed methodology the safety benefit of active hood lift system (AHLS) is assessed. Both actual accident data analysis and simulation experiment are conducted to establish statistical models that are used for estimating the reduction of pedestrian fatality It is believed that the developed methodology and outcomes would be greatly useful in developing various advanced vehicular technologies and establishing more effective traffic safety policies.

• Archives of design research
• /
• v.19 no.2 s.64
• /
• pp.81-90
• /
• 2006

Pedestrians perceive differently from the sideway views or the exteriors of the buildings on the way to their destinations. Therefore, the navigation experience can become much different when the path was chosen based on the individual's preference from it is not. By focusing on the effects of the individual pedestrian' path choice on their navigation, this paper presents an algorithm designed for pedestrians to be able to explore their preferred path and proposes a prototype of navigation system based on the algorithm. The navigation support system searches for the best path upon their individual preferences and information of the destination. The system provides the process of retrieving the final path via the pedestrian-support system interaction. The path retrieval is peformed with the combinational matrix of keywords that are formulates Fuzzy theory from the correlations between the terms describing preferences used in the path preference survey. This paper presents the potentials of the path finding method tailored to pedestrians' preferences by a simulation of the proposed path retrieval algorithm.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2018.05a
• /
• pp.543-544
• /
• 2018

가상 현실 네비게이션을 위한 전방향 트레드밀은 사용자가 걷거나 달리면서 물리적으로 고정된 공간 내에 사용자를 유지할 수 있도록 지면 모션을 시뮬레이션하는 장비이다. 이러한 트레드밀 시스템의 성능이나 안정성을 정량적으로 측정하거나 분석하기가 어렵기 때문에 이전의 연구에서는 주관적 설문 조사와 같은 정성적 분석 방법을 사용하였다. 본 연구에서는 인간의 보행 경로와 유사한 궤도를 따라 움직이는 무인 차량 시스템을 이용한 새로운 정량적 데이터 측정 방법을 제안한다. 무인 차량 시스템은 미리 정의 된 인간의 보행 동작을 시뮬레이션하고 트레드밀 시스템에 대한 제어 입력을 제공하며, 다축 가속 및 방향과 같은 차량의 동적 데이터를 측정 할 수 있다. 또한 이 데이터는 평상시의 정기 또는 다른 제어 알고리즘과의 비교를 수행할 수 있다. 본 연구에서는 궤적 시뮬레이션 모듈, 데이터 수집 모듈, 성능 평가 모듈 등 전방향 트레드밀에 대한 정량 분석 방법의 설계 구조 및 초기구현 결과를 제시하고자 한다.

• Journal of the Korea Society for Simulation
• /
• v.20 no.1
• /
• pp.79-85
• /
• 2011

The problem of evacuating pedestrians from a room or channel under panic conditions is of obvious importance in daily life. In recent years, several computer models have been developed to simulate pedestrian dynamics. Understanding evacuation dynamics can allow for the design of more comfortable and safe pedestrian facilities. However, these models do not take into account the type and state of mind of pedestrians. They deal with pedestrians as particles and the state of mind as a social force, which is represented by conservative and long-range interactions between individuals. In this study, I used the lattice model proposed in my previous study to explore the evacuation behavior of pedestrians with morality. In this model, three types of pedestrians are considered: adults, children, and injured people. Collisions between adults and children result in injured people. When the number of injured people continuously in contact with each other reaches a given value k, the injured people are removed from the lattice space. This situation is the same as that in which pedestrians start stepping over injured people. This behavior was interpreted as the morality of pedestrians. Simulations showed that the evacuation showed down and eventually became jammed owing to the injured people acting as "obstacles" in relation to the morality k.

• Proceedings of the KIEE Conference
• /
• 2006.07d
• /
• pp.1971-1972
• /
• 2006

본 논문에서는 휴머노이드 로봇의 예기치 않은 불규칙한 지면 환경 하에서 안정성을 확보하기위한 보행 전략을 제시한다. 휴머노이드 로봇의 안정성에 관한 지표로 널리 사용되는 ZMP(Zero Moment Point)나 COG(Center Of Gravity)를 이용한 방법은 많은 양의 연산을 필요로 하고, 주로 외부에서 가해지는 임의의 힘에 대처하는데 초점을 맞추고 있다. 휴머노이드 로봇의 불안정성을 유발하는 또 다른 주요한 원인으로 예기치 못한 지면 환경을 꼽을 수 있는데, 본 논문에서는 이러한 불규칙한 지형을 보행하는 휴머노이드 로봇의 실시간 안정성을 확보하는데 있어 ZMP나 COG가 아닌 지면으로부터의 반발력을 이용한 직관적인 알고리즘을 제시하며, 자체 개발된 휴머노이드 로봇 ISHURO II를 이용한 시뮬레이션으로 제시된 알고리즘을 검증한다.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.21 no.5
• /
• pp.756-768
• /
• 1997

In order to control a dynamic gait of quadrupedal walking robot, the equations of motion of the whole mechanism are required. In this research, the equations of motion are formulated analytically using Kane's dynamic approach. As a dynamic gait model, a trot gait has been adopted. The degree of freedom of whole mechanism could be reduced to 7 by idealizing the kinematic feature of the trot gait. Using the equations of motion formulated, the results of the redundant-joint torque analysis and the simulation of dynamic walking motion are presented.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.10 no.6
• /
• pp.24-31
• /
• 2011

This study deals with the operational effectiveness of roundabout. The roundabout is currently under consideration in our country depending on the result of existing researches, that the roundabout decreases delay and is environmentally friendly compared to the signalized intersection. The purpose of the study is to analyze the operational effectiveness of the roundabout by the change of pedestrian traffic volume. In pursing the above, this study gave particular emphasis to designing a network of roundabout, developing some scenarios for analysis including both entering traffic volume and pedestrians volume, and comparatively analyzing the average controlled delay time per vehicle. In this study, VISSIM model was used as a tool for traffic simulation. The main results are as follows. First, as a result of analyzing a traffic delay based on the pedestrian traffic volume, pedestrian traffic volume was analyzed to have a great impact on the roundabout operation. Second, the more pedestrian traffic volume were evaluated to indicate the more traffic delay. When the entering volumes with 1,000persons/hour (pedestrian volume) were more than 800pcph in the single-lane and 1,600pcph in the double-lane roundabout, the operational efficiencies of signalized intersections were evaluated to be better than those of roundabouts.

• Journal of the Korea Convergence Society
• /
• v.6 no.2
• /
• pp.19-24
• /
• 2015

Nowadays, the number of people who do not move actively or are treated for rehabilitation is increasing because of the disorder or the paralysis of their own lower body by the industrial disaster. In this study, the walker for the people whose bodies are not convenient or the old is investigated. The walkers due to the height of walker are designed and the structural simulation analysis is carried out. The study models of walker are modelled with CATIA program and analyzed with ANSYS program. As the analysis result, the models of 1, 2 and 3 have the maximum stresses extremely below the yield stress of this model and the elastic deformations at these models occurs. Among these models, As the maximum deformation of model 3 has the least value among these models, models 3 is thought to have the best durability. The safety of walker model can be estimated by the basis of the result of this study. The damage can be prevented and the durability is examined by applying this result into the design of walker. And it is possible to be grafted onto the convergence technique at design and show the esthetic sense.