• 한국수소및신에너지학회논문집
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• 제26권3호
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• pp.241-246
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• 2015

The interest of New Renewable Energy is increasing globally because of the increment of the uncertainty for the energy's supply and demand, and the increment of the frequency in weather anomaly and its damages. One of the New Renewable Energies, Hydrogen receives attention as the future energy that can deal with global environment regulation. Fuel Cell Electric Vehicle (FCEV) is an environment-friendly vehicle that uses Hydrogen as fuel. The electric power for FCEV is generated by chemical reaction with Oxygen from the air and Hydrogen. Hyundai Motor Company (HMC) has developed a proprietary fuel cell system since 2005. In 2012, HMC is the first car maker that mass-produces the ix35 FCEV to the worldwide such as North America, Europe, etc. In order to develop and improve the FCEV technology, data acquisition and analysis of the driving vehicle information is essential. Therefore, the monitoring system is developed, which is consist of datalogger, Automatic Vehicle Location (AVL) server and main server. Especially, WCDMA technology is integrated into the system which enables the data analysis without any restriction of time and region. The main function of the system is the analysis of the driving pattern and the component durability, and the safety monitoring. As a result, ix35 FCEV has successfully developed by using the developed monitoring system. The system is going to take an advantage of development in the future FCEV technology.

• 기술혁신연구
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• 제29권4호
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• pp.161-196
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• 2021

AI가 시장의 패러다임을 바꾸는 새로운 혁신 기술로 주목받고 있다. 기업은 AI의 기술적 이점이 잘 반영되면서 동시에 시장의 수요를 충족하는 방법을 적용하여 신제품을 개발해야 한다. 하지만 업계에는 이러한 요건을 충족하는 방법론이 부재하다 보니 기업들은 기존 제품개발 방법론을 이용해 AI 기반 제품개발을 추진하고 있다. 이로 인해 AI의 기술적 이점이 충분히 반영되지 못하거나 AI의 기술적 잠재성이 시장 가치로 연결되지 못하게 된다. 이러한 한계를 극복하기 위해 이 연구는 AI 기반의 신제품을 개발하기 위한 새로운 방법론을 제시한다. AI 혁신이 기존 방식과 다른 차별적 속성을 확인하고, 이러한 속성이 반영된 제품 설계 프로세스와 방법론을 제시한다. 이 연구는 AI 제품개발이 양손잡이 접근(Ambidexterity approach)을 지향해야 함을 강조하며, 테크놀로지 푸시(Technology push) 기반의 아이디어 생성, 마켓 풀(Market pull) 기반의 소비자 요구조건 분석, 제품 설계 구체화 등을 포함하는 AI 기반 제품의 설계(Design) 프로세스 및 구체적인 개발 방법을 제안했다. 이 방법론의 현실 적용 가능성을 검증하기 위해 사례연구를 실시, AI 기반의 차량용 인포테인먼트 시스템개발 전략을 도출한다. 기술적 가능성에 기반하여 13개의 혁신 아이디어를 생성했고, 카노(KANO) 분석과 TOPSIS의 결합에 의한 소비자 요구조건 분석을 통해 총 6개의 신제품 개발 전략을 도출했다. 이 연구제서 제안하는 방법론은 기업이 AI 기반의 혁신제품을 통해 신시장을 개척하거나 기존 제품의 고도화를 통해 시장 확장을 펼치는 데 유용하게 활용될 수 있다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.434-439
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• 2005

In order to prevent the global warming, Korea has had a ratification to the Kyoto Protocol which is specified the air pollution level should be lower the condition of the year 1990 until the year 2012, in hence the traffic system produced mostly the air pollution has been faced to big change. According to the reinforcement of higher level for environmental condition, alternative way to the conventional traffic system is required, so that is fuel cell technology of commercialized R&D program used by hydrogen fuel, and further for the optimized high energy efficiency it has been considered the advanced development of traffic system used the conventional railroad system. But it is moreover expected the huge amount of initial investment, so at the current, next new traffic system is needed. This study is for the improvement of urban traffic system in domestic which should be seriously changed for environmental friendly through the reduction of air pollution by fuel gases of vehicle and human convenience to be easily approached. In hence it is proposed the development of superior high efficiency-'Fuel-cell Rubber-tired Tram' system manufactured by the composite car-body.

• 한국철도학회논문집
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• 제19권6호
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• pp.833-843
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• 2016

최근 철도 화물 수송은 컨테이너 전세 열차뿐만 아니라 시멘트, 철강 등 일반 화물의 전용열차 수가 증가하고 있고, 이에 따라 영차 수송 계획은 점차 단순해지고 있다. 반면에 공화차 수송의 경우, 수송 계획 최적화 시스템의 부재로, 사령의 경험에 의해 공화차 배분이 이루어지고 있으며, 이의 효율성 여부는 검증된 바 없고, 공화차 배분을 위한 별도의 의사결정지원시스템의 필요성은 여전히 존재한다. 본 연구에서는 연구 문헌상의 공화차 배분 최적화 모형뿐만 아니라 2010년 전후로 개발 되었다가 최근 사용이 중단된 화물수송최적화 시스템(KTOCS)상의 공화차 배분 최적화 모형을 비판적으로 살펴본 후, 수송 문제를 활용한 새로운 공화차 배분 최적화 모형 및 해법을 제시한다. 이 최적화 모형은 기존 모형과 달리, 추가 제약이 있는 수송문제에 포함되는 아크를 동적으로 생성해내는 열생성 기법에 기초하고 있다. 이를 이용한 우리나라 전체 철도 네트워크에 대한 시뮬레이션 결과, 실적 상에 나타난 공화차 km를 상당히 낮출 수 있는 것을 확인할 수 있었다.

• 한국정밀공학회지
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• 제31권10호
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• pp.935-945
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• 2014

This paper presents a new road generative system that employs a pad of preventive overspeed or tollgate. The system consists of pad, shaft, torsional damper, oneway-clutch, gear system, and electricity generator components. When the car driven through the road generation system, it occurred to surplus energy in the DC power. In order to maximize the power of electricity energy harvester, the simulation software is developed. It is used to determine parametric dimension for optimal design with the theoretically calculated results from the simulation software. The transient responses at the conditions of low and high vehicle speed are compared with the calculated results as torque, impact force, power, out energy etc. Consequently, before design a road generation system, the analysis of simulation results shows that the proposed concept and system has efficiency and confidence.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 추계학술대회
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• pp.417-420
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• 2006

FCEV uses electric energy generated from the reaction between Hydrogen and Oxygen in fuel cell stack as driving force. As fossil fuels are exhausted, fuel cell is regarded as a potent substitute for next generation energy source, and thus, most of car-makers make every efforts to develop fuel cell electric vehicle (FCEV). In addition, fuel cell is also beneficial in aspect of environment, because only clean water is produced during chemical reaction process instead of harmful exhausted gas. Generally, Hydrogen is supplied from high-pressured fuel tank, and air blower (or compressor) supplies Oxygen by pressurizing ambient air. Air blower which is driven by high speed motor consumes about $7{\sim}8%$ of energy generated from fuel cell stack. Therefore, the efficiency of an air blower is directly linked with the overall performance of FCEV. This study will present developing process of an air blower and its consisting parts respectively.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
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• pp.390-394
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• 1994

A elevator group supervisory system is designed to perform efficient operation of multiple elevators, and its basic function is to assign an appropriate elevator to a given hall-cell. In this paper, in order to improve elevator group control performance, we propose a new dispatching system which includes fuzzy multi-attribute decision making(MADM). In most cases, the purpose of group control is to maximize control goals as much as possible. Unfortunately, the decision of optimal elevator to a given hall cell is made with very uncertain information of the system, and some of control goals are related each other. The uncertainty is mainly resulted from car calls generated by serving hall calls. A fuzzy MADM algorithm is proposed to deal with these problems to improve system performance.

• 한국공작기계학회논문집
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• 제11권1호
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• pp.1-9
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• 2002

Reverse engineering is an emerging technology to obtain CAD models from existing physical parts in the case that CAD models are not available or paras are changed an(1 modified so that new CAD models for final parts are necessary. Reverse engineering helps designers to quickly generate computer interpretable data from existing Physical objects So it is applying for field of Rapid Prototyping NC Processing CAE, Inspection and so on. The objective of this study is to develop the software that deals with unorganized point data and quickly obtains CAD model. In this paper, several models such as human\`s bone, car, are experimented by the proposed methods.

• 한국자동차공학회논문집
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• 제13권5호
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• pp.121-126
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• 2005

This paper describes the attributes, performance and development status of a high performance capacitive torque sensor intended for use in a electric power steering (EPS) system. The EPS system is composed of torque sensor, ECU, motor, gears and etc. Among the elements, torque sensor in the steering column is one of the core technologies. The new capacitive torque sensor in this paper is developed differently from working principle and mechanical structure compare to extant torque sensors in market and patent. Based on the result of numerical analysis, a experimental equipment is made which is composed of a test jig and a capacitive sensor and validity of numerical analysis and feasibility of the torque sensor are verified.

• 한국자동차공학회논문집
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• 제21권5호
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• pp.130-135
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• 2013

Until now, passenger airbag design is based on the referred car design and many repetitive crash tests have been done to meet the crash performance. In this paper, it was suggested a new design process of passenger airbag. First, key performance factors were determined by analyzing the injury risk effectiveness of each performance factor. And it was made a relationship between injury risk and performance factor by using the response surface model. By using this one, it can be predicted the injury risk of head and neck. Predicted injury risk of optimal design was obtained through this injury risk prediction model and it was verified by FE analysis result within 18% error of head and 9% error of neck. It was shown that a target crash performance can be met by controlling the key performance factors only.