• Proceedings of the KSR Conference
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• 2003.10c
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• pp.316-321
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• 2003

The railroad is a means of large transportation which has many talents such as a safety and a regularity. That is a results from various confidential performance tests and evaluations of the system. The railroad system consist of various subsystems - vehicle, power supply, signal, communications, track structures, operations, etc. Among them, as an item of safety evaluation there is a measurement of wheel/rail force, so called a measurement of derailment coefficient. This is a very important item because a derailment of a train will bring about a big accident. Especially it is more important in high speed rail of which operation speed is over two times as fast as existing rail. In this paper, it is introduced to preprocess the wheelset for measuring wheel/rail force of high speed rail, such as to treat a measuring wheelset, adhesion of strain gauges and static load test, running test result of main line.

• Journal of Institute of Control, Robotics and Systems
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• v.18 no.3
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• pp.251-257
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• 2012

Unmanned ground vehicles have important military, reconnaissance, and materials handling application. Many of these applications require the UGVs to move at high speeds through uneven, natural terrain with various compositions and physical parameters. This paper presents a framework for high speed autonomous navigation based on the integrated real time traversability. Specifically, the proposed system performs real-time dynamic simulation and calculate maximum traversing velocity guaranteeing safe motion over rough terrain. The architecture of autonomous navigation is firstly presented for high-speed autonomous navigation. Then, the integrated real time traversability, which is composed of initial velocity profiling step, dynamic analysis step, road classification step and stable velocity profiling step, is introduced. Experimental results are presented that demonstrate the method for a $6{\times}6$ autonomous vehicle moving on flat terrain with bump.

• Proceedings of the Safety Management and Science Conference
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• 2003.05a
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• pp.53-61
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• 2003

The process of railway traffic planning is composed of several steps such as long - term, mid - term, short - term, and real - time plan. The planning of vehicle and manpower resources is a main research topic in tactical short - term planning step Railway vehicle is usually consisted of a power car, passenger/freight cars and human resource is composed of engine driver, cabin crew, ground personnel. So far , power car was main research target in railway vehicle scheduling problem. Recently according as the light electric railway or high - speed railway is introduced, the operational planning of train set vehicles become important . In this paper , we introduce the conceptional model for trainset restoring problem and developed heuristic algorithm.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.791-794
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• 2010

고속도로에서 주행속도가 높아지게 되면, 도로의 노면 상태에 따라 차량의 안전과 쾌적한 운전자의 환경이 변화될 수 있다. 이처럼 도로의 노면 상태를 결정하는 주된 인자는 도로의 평탄성과 소성변형에 의한 노면의 요철이라고 할 수 있다. 평탄하지 못한 도로를 자동차가 고속으로 주행하게 되면, 자동차의 속도에 의한 도로와의 마찰이 발생하여 자동차에는 매우 큰 흔들림이 발생하게 된다. 또한, 도로의 경우에도 자동차의 차축과 도로면에서 발생하는 충격에 의해 미세한 진동이 발생하게 된다. 그리고 광섬유 브래그 격자(FBG)센서는 외부에서 작용하는 매우 미세한 물리량에 의한 변화의 측정이 가능한 매우 우수한 계측 센서로 사용이 가능하기 때문에 온도보상형 광섬유진동센서를 제작하였고, 이를 고속도로 포장면의 평탄성 모니터링에 활용하고자 하였다.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.713-718
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• 2006

In this study, temperature sensors were adhered to transformer that is used in KHST(Korean High-Speed Train) to verify variation of temperature characteristics about transformer synthetically and efficiently. In the case that temperature of transformer exceeds reference temperature for running of KHST, overheating of transformer may cause a fatal accident of vehicle. Characteristics and main specifications of transformer in KHST were described in this paper. Also, measuring system for temperature measurement of transformer was explained in brief. Temperature data of transformer was acquired using measuring system, KRRI(Korea Railroad Research Institute) analyzed characteristic in contrast with comparing with temperature of transformer about month, running speed and running time.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.245-250
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• 2006

From the research which it sees the safety regarding a high-speed railway vehicle collision and a derailment evaluation research it an example and executed. Japan, France, Germany and Spain, Italy and with our country together it compared a high-speed railway vehicle collision of the high-speed railroad operating nation and derailed relation safety standard and safety against the evaluation system trade name comparison it analyzed. The research which it sees it led and the accident instance against the hazard analysis against the collision and a derailment of the high-speed railway vehicle and a risk evaluation together and a high-speed vehicle collision and derailed it cannot prevention plan from hereafter domestic comparison it analyzed forecast it presented.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.62-65
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• 2006

From the research which it sees it tried to observe from the comfort viewpoint where the passenger feels the high-speed railway car safety standard which it is see clearly from the domestic railroad safety law. It presents a minimum safety standard, the passengers being an safety most, the place where to sleep receive the service which is comfortable from the railroad safety law and they do there is a most big difference. It analyzed the correlation of the comfort where the passenger feels the vehicle efficiency standard which it is presenting from railroad safety law 59th clause and from the research which it sees consequently.

• Proceedings of the KIEE Conference
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• summer
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• pp.1313-1315
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• 2004

고속철도는 수많은 하이테크 기술의 결정체이며, 이 중에서도 주변압기, 주전력변환장치 및 주전동기는 차량의 성능을 결정하는 매우 중요한 요소이다. 이러한 전장품들에 대한 다양한 성능을 평가하고 진단하기 위해 상시계측시스템을 구축하여 활용하고 있다. 이러한 계측장비들은 여러 전장품에 대한 계측 및 분석을 통한 시험평가와 동시에 완성차시험이나 본선시운전 시험시에 발생할 수 있는 고장원인을 찾아내고 해결하는데 많은 도움을 주고 있다. 본 논문에서는 상시계측시스템을 통해 주변압기, 주전력변환장치, 전동기 등에 대한 고장진단을 실시한 내용에 대하여 연구하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.661-664
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• 2006

과거 텔레매틱스와 DMB 기술 융합 모델은 대표적인 통방 융합의 예견되어 왔으며, DMB는 교통정보, 지도, POI 등 대용량의 텔레매틱스 컨텐츠를 방송망을 통해 내려 보낼 것으로 예측되었다. 하지만 현재 DMB 방송에서 비디오/오디오 보다 데이터 수익성이 적어 많은 대역폭 할당에 할 수 없는 실정이다. 본 논문은 방송에 적합한 텔레매틱스 컨텐츠를 컨텐츠별로 우선순위를 정함으로써 제한된 대역폭에서도 전송 주기를 효과적으로 조절하여 차량의 고속 이동 중 음영지역을 고려하여 단방향 통신의 수신율을 향상시켜줄 수 있다.

• Proceedings of the KIEE Conference
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• 2003.07b
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• pp.1294-1296
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• 2003

For this research, we developed the hardware and software of the measurement system for on-line test and evaluation. The software controls the hardware of the mesurement data and acts as interface between users and the system hardware. In this paper, we is studied for Aux. Block performance of railway vehicle. In order to this test is developed signal conversion system. Using this system. we obtained important result for battery voltage, Aux. Block temperature.