• Proceedings of the KSR Conference
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• 2007.05a
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• pp.126-131
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• 2007

Design for automatic coupler system of Korean Tilting Train eXpress is described. In order to carry out validation & verification activities for system design, test condition is taken into account at collision speed of 10km/h, which is required in Safety Notice for rolling stock vehicle. The study aims at safety validation between a coupler and car body including design verification for a coupler through the identifying of system design and the evaluating of test results.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1025-1026
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• 2008

The level crossing collision accident which comprises more than 90 percent of all level crossing accidents is one of the most serious safety problems. There is a critical need for providing safe strategy and is focusing on the level crossing information rather than measures at a grade crossing. This study is intended to develop technology for accident prevention and damage reduction based on accident cases analysis result and improvement direction to complement shortcomings of safety equipment of conventional level crossing and to establish safety of travelers(train, motor vehicle, person).

• Proceedings of the IEEK Conference
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• 2001.06d
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• pp.163-166
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• 2001

본 논문에서는 ITS(Intelligent Transportation System) 기술중의 하나인 차량 충돌 방지 시스템의 신호처리부를 설계 구현하였다. 제안된 시스템은 FMCW (Frequency Modulated Continuous Wave)방식의 770Hz 밀리미터파 레이더를 기준으로 파라미터 값을 설계하여 거리와 속도를 실시간 검출하도록 구현되었다. 제안된 시스템은 TI사의 TMS320C31-40 DSP 와 AT89C52 Bbit 마이크로프로세서로 구현되어 10Hz 이상의 갱신율, 0.2m의 거리 분해능 및 2knvh의 속도 분해능을 제공하고 있다. 실험 환경으로 주파수 발생기(Function Generator)에서 비트주파수(Beat Frequency)를 생성하여 동작을 확인하였다.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 1993.06a
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• pp.1246-1249
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• 1993

In this paper, we propose an algorithm of obstacle avoidance using fuzzy inferences. After the basic idea of the path generation algorithm using piecewise polynomials is described, the obstacle avoidance problem using fuzzy inferences is considered. Main concept of the avoidance algorithm is to modify intermittent point data using fuzzy inferences and to generate the collision free path based on the modified data. Finally, simulation result demonstrate the effectiveness of the proposed algorithm.

• 연구논문집
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• s.24
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• pp.141-149
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• 1994

Recently, IVHS technology attracted public attention according as national IVHS project was initiated by SOC. In advanced countries, specially in USA, Europe, and Japan. IVHS technology was already studied for over ten years as national strategic project. In this paper we describe the concept and development trend of AVCS which is a part of IVHS technology. The important contents in AVCS are automatic collision warning and avoidance system, automatic intelligent cruise control system, automatic vehicle platoon control system, automatic lateral control system, etc.

• Journal of Trauma and Injury
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• v.36 no.3
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• pp.258-260
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• 2023

Traumatic rupture of the right hemidiaphragm occurred following a high-velocity motor vehicle collision in the case presented herein. The resulting herniation of small bowel loops into the thorax resulted in hemodynamic and respiratory compromise due to pressure effects on the right heart and major vessels. The patient's hemodynamic status improved with reduction of enterothorax, and the diaphragmatic defect was repaired. We discuss the available literature and learning points from this rare case.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.2830-2837
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• 2011

In this paper, a flexible track modeling of turnout was developed and dynamic characteristics of turnout rails were analyzed when a vehicle passed through the turnout. The flexible track modeling is effective to the stiffness and durability design of turnout, because it can capture the deformation and dynamic stress due to the collision of between wheels and rails when the vehicle move to the tongue rail. Also, a more accurate running safety can be obtained by considering the interaction between wheel and rail deformation. Solid finite elements were used for variable cross-sections of rails and the variation of rubber stiffness was modeled. The proposed flexible track modeling in this paper was verified to be valid by comparison with the experiment of the turnout system.

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.353-356
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• 1997

Vehicle steering system determines the direction of a vehicle. A manual steering system consists of mechanical connections between the steering wheel and tires. Recent power steering system adds an actuator to help a driver to steer easily at low speed. However, at front collision, the driver can be injured by steering shaft and the power steering pump decreases the engine power. To solve these problems, electronic power steering system which connects the steering wheel and tires with electronic connection is proposed, that has advantages such as decrease of engine load and increase of driver safety reactive. Since the ratio between driver's steering torque and steering torque of tires can be controlled freely, the torque which is delivered from the road to the driver through tires and steering wheel can be reshaped to make the driver feel comfortable. In this paper, the ratio of delivering steering torque and the magnitude of force to be delivered from road to driver has been controlled using fuzzy controller, and it's effectiveness has been shown through simulation results.

• Journal of Power System Engineering
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• v.16 no.1
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• pp.84-90
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• 2012

In unmanned vehicles' navigation, the shapes of obstacles are generally irregular and complex. The motion of vehicles based on the range sensor system such as ultrasonic sensors or laser sensors can be unstable due to the irregular shape of the obstacles. In this case, to generate stable trajectory of unmanned vehicles equipped with range sensors, we need an approach that can simplify an obstacle's irregular shape information. In this paper, we propose the trajectory generation algorithm that an vehicle can stably navigate in the environments where irregular shaped obstacles are scattered. The proposed method is verified through the analysis of vehicle's trail and direction data acquired by simulations and implementations.

• Transactions of the Korean Society of Automotive Engineers
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• v.24 no.3
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• pp.352-357
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• 2016

More recently, workers and passengers of casualties has increased by rear-end collisions of unexpected while working on the road. Recently attracted air chamber TMA mounting car accidents which occurred in 3 years, and analyzed the effect of reducing the shock absorption and protection performance and casualties. There is a risk of the vehicle AIS4 more injury of high five accidents of casualties risk, also, was the analysis that there is risk of death was avoided by the air chamber TMA and SGT. Therefore, by mounting the TMA in the rear-end accident, so you can reduce the death and casualties, it must be increased this of attach rate for road construction vehicle.