• Journal of the korean Society of Automotive Engineers
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• v.26 no.4
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• pp.6-10
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• 2004

자동차의 능동안전(Active Safety)을 중요시하는 경향은 1990년대부터 부각되기 시작하였다. 사고발생 후에 피해를 최소화하려는 Passive Safety 기술과 사고를 방지하고 사고의 피해를 줄이는 Active Safety 기술의 효과적인 조합을 통하여 안전을 확보하는 차량을 첨단 안전차량(ASV, Advanced Safety Vehicle)이라 한다.(중략)

• Proceedings of the KSR Conference
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• 2003.10b
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• pp.247-252
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• 2003

본 논문은 철도안전운행을 위하여 능동적으로 철도차량을 제어를 지리정보시스템기법을 활용하는 방안을 제시하고 있다. 이를 위해서는 철도차량의 위치를 얼마나 정확하게 추적 및 표출이 가능한지를 검토해 보았다. 구체적으로는 GIS의 정의와 기능을 살펴보고 GIS기법을 활용한 능동적 철도차량제어의 에시를 정리하였다. 능동적 철도차량을 제어를위한 핵심요소인 철도차량 위치자료의 정확성을 수치지도의 축적별로 분석하였다. 최종적으로는 능동적으로 철도차량을 제어를 지리정보시스템기법을 활용하기 위해 칠요한 주요쟁점사항을 정리하였다.

• Information and Communications Magazine
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• v.26 no.4
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• pp.46-54
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• 2009

최근, 차량간 통신 기술의 적용을 통해 운전자의 안전성 강화를 목적으로 하는 능동형 차량 안전서비스 실현을 위한 연구가 활발히 진행되고 있다. 이러한 서비스의 범주에는 충돌사고 경고 및 회피, 도로상의 위험요소 경고, 교통 안전정보 제공 등이 포함된다. 본 고에서는 통신 시스템 설계 관점에서 차량 안전서비스 실현을 위한 기술 요소, 통신 프로토콜 설계 및 개발 방법론에 대하여 논하고자 한다.

• Korea Information Processing Society Review
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• v.16 no.1
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• pp.81-88
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• 2009

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.4
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• pp.707-714
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• 2016

Active driving safety systems for vehicle, such as the front collision avoidance, lane departure warning, and lane change assistance, have been popular to be adopted to the compact car. For improving performance and competitive cost, FMCW radar has been researched to adopt a phased array or a multi-beam antenna, and to integrate the front and the side radar. In this paper we propose several efficient methods to implement the signal processing module of FMCW radar system using low cost DSP. The pulse width modulation (PWM) based analog conversion, the approximation of time-eating functions, and the adoption of vector-based computation, etc, are proposed and implemented. The implemented signal processing board shows the real-time performance of 1.4ms pulse repetition interval (PRI) with 1024pt-FFT. In real road we verify the radar performance under real-time constraints of 10Hz update time.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2591-2593
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• 2001

본 논문에서는 차량거리 제어장치를 구성하는 능동적인 안전장치 개발의 도구로써 선진국에서 선박 및 항공기에 이미 상용화되고 있는 이른바 Head-up display(HUD)를 차량에 도입, 차량정보 Monitoring System을 개발하는 것을 목적으로 한다. 차량에 도입하고자 하는 HUD의 개념은 차량 운전자의 전면 대시 보드 상에 디스플레이를 위치시켜 운전자 전면의 도로시야와 차량정보를 동시에 획득하여 안전도 및 편의성을 높이고자 하는 것이다. 그러나 디스플레이 정보가 맺히는 상이 놓이는 위치 때문에 기존의 HUD는 외부의 밝은 광 아래에서 선명한 정보를 얻기가 매우 어렵다. 이를 해결하기 위해서 본 논문에서는 광제어 필름, 빔 스플리터 등을 이용해 결상면에 코팅처리를 하였으며, 좀 더 고성능의 광원을 확보하고, 미러부의 각도변경 및 LCD의 투과율을 증대하였다. 그 결과 기존의 제품 보다 매우 높은 시인성을 나타내는 것을 확인할 수 있었다.

• Journal of Auto-vehicle Safety Association
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• v.11 no.3
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• pp.37-42
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• 2019

This paper presents an autonomous acceleration planning algorithm for pedestrian collision avoidance at urban. Various scenarios between pedestrians and a vehicle are designed to maneuver the planning algorithm. To simulate the scenarios, we analyze pedestrian's behavior and identify limitations of fusion sensors, lidar and vision camera. Acceleration is optimally determined by considering TTC (Time To Collision) and pedestrian's intention. Pedestrian's crossing intention is estimated for quick control decision to minimize full-braking situation, based on their velocity and position change. Feasibility of the proposed algorithm is verified by simulations using Carsim and Simulink, and comparisons with actual driving data.

• Journal of the Korean Society for Railway
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• v.10 no.6
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• pp.709-716
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• 2007

An active steering bogie has been theoretically proved to improve both stability and steering performance remarkably. However, It has not been commercialized yet even though many researchers have been trying to develop it because some technical difficulties still exist such as information acquisition fer active control, increasing mechanical components, high energy consumption, fail-safe problem and so on. To solve those problems, an advanced active steering mechanism is proposed in this paper. With this mechanism, required control force is small enough to use direct drives. Therefore, the number of additional mechanical components can be minimized since mechanical transducers like gears are not necessary. Fail-safe function can be also inserted easily. In this paper, concept design of the proposed active steering bogie is introduced and the possibility is verified through computer simulation using linear dynamic model.

• Journal of Auto-vehicle Safety Association
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• v.11 no.2
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• pp.44-52
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• 2019

In this study a safety evaluation method is presented for a ADAS vehicle to be tested in collision situation when multiple vehicles are present on a single lane. Test scenarios are developed based on Euro-NCAP assessment scenarios, accident database and related simulation results in previous works. An automated evaluation system that is called as the K-target mover is used for active safety evaluation experiments. The experiments are conducted with two types of tests. First, the rear-end collision tests with 25% and 50% overlap for the test vehicle and target vehicle are conducted with the two kinds of test vehicles. On the other hand, the rear-end collision tests which include multiple vehicles in a single lane with 25% and 50% overlaps, are also conducted. Experimental results show that the test vehicles with ADAS cannot recognize the collision situation sometimes in the developed test scenarios, even in the case that the test vehicle showed stable performance in the simple overlap scenarios.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.3
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• pp.733-739
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• 2004

As per the recent technology related to safety of vehicles, Active safety system is being developed in combination withthe technology of electronic system. For example, ABC(Active Body Control), ABS(Antilock Brake System), ACC(Adaptive Cruise Control) are representative of this system. This technology is based on an electronic system, and shares a lot of data through network-system invehicles. Therefore, the control-algorism and the practicable application are realized in this research in order that CAN, network system for vehicles can run the brake device, which is composed mechanically and hand-operated. Additionally the possibility is confirmed that this control-system can be compatible with the existing electronic system in vehicles.