• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2010년도 제35회 추계학술대회논문집
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• pp.63-71
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• 2010

액체산소와 케로신을 사용하는 액체로켓엔진 연소기의 성능평가를 위한 가압식 연소시험설비의 구성 요구조건에 대해 기술하였다. 본 논문에서 제시한 가압식 연소시험설비의 요구조건들은 KSR-III 및 30톤급 액체로켓엔진 연소기의 자력개발 과정에서 활용된 지상연소시험장 구축과 운용 경험을 바탕으로 도출된 것이다. 따라서 본 논문은 대형 연소시험설비의 설계 및 시공을 위한 사전 검토 내역 및 기본 자료로 활용할 수 있을 것으로 기대한다.

• 한국추진공학회지
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• 제4권1호
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• pp.102-108
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• 2000

세계 여러나라의 유도무기체계에 적용되고 있거나 개발중인 착화기술의 개략적인 특성과 장단점을 제시하고, 각 기술의 수행능력인 성능, 신뢰성, 안전성, 가격 등을 비교 분석하였다. 분석결과, 어느 무기체계에서나 만족될 수 있는 만능적인 착화기술은 없으며 적용요구조건과 비용에 따라 각기 특별한 장단점을 가진다. 그러나 현재 선진국에서 개발되어 시험 적용되고 있는 다이오드 레이져를 이용한 착화방법은 본질적인 잇점들 때문에 차후 유도무기 착화기술에 지배적으로 사용될 것으로 판단된다.

• 산업경영시스템학회지
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• 제38권2호
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• pp.120-128
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• 2015

Quality function deployment (QFD) is a useful method in product design and development to maximize customer satisfaction. In the QFD, the technical attributes (TAs) affecting the product performance are identified, and product performance is improved to optimize customer requirements (CRs). For product development, determining the optimal levels of TAs is crucial during QFD optimization. Many optimization methods have been proposed to obtain the optimal levels of TAs in QFD. In these studies, the levels of TAs are assumed to be continuous while they are often taken as discrete in real world application. Another assumption in QFD optimization is that the requirements of the heterogeneous customers can be generalized and hence only one house of quality (HoQ) is used to connect with CRs. However, customers often have various requirements and preferences on a product. Therefore, a product market can be partitioned into several market segments, each of which contains a number of customers with homogeneous preferences. To overcome these problems, this paper proposes an optimization approach to find the optimal set of TAs under multi-segment market. Dynamic Programming (DP) methodology is developed to maximize the overall customer satisfaction for the market considering the weights of importance of different segments. Finally, a case study is provided for illustrating the proposed optimization approach.

• 품질경영학회지
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• 제46권4호
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• pp.821-842
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• 2018

Purpose: To derive key requirements and key technologies for weapon system acquisition business by using Qualify Function Deployment (QFD), and to reduce business cost by setting the target performance and key expense of weapon system. Methods: We propose a QFD methodology that can induce rational decision-making by translating analyst's subjective opinions into quantitative values when analyzing requirements at the initial stage of weapon system development project. Based on QFD methodology, QFD application model combining house of quality, value engineering, and analogy cost estimating technique is presented. Results: It was possible to analyze the specific requirements necessary for the development of the weapon system, to solve the communication problem of the participants, to set clear development direction and target. Conclusion: By applying the QFD application model at the early stage of the weapon system acquisition project, it is possible to reduce the business cost by establishing clear development direction and goal through the procedural analysis process.

• Nuclear Engineering and Technology
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• 제56권6호
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• pp.2395-2403
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• 2024

With the rapid development of DC high voltage accelerator, higher requirements have been raised for the design of DC high voltage power supply, requiring more stable high voltage with lower output ripple. Therefore, it also puts forward higher requirements for the parameter design of the voltage doubling rectifier circuit, which is the core component of the DC high voltage power supply. In order to obtain output voltage with better performance, the effects of the working frequency, the stage capacitance and the load resistance on the output voltage of the voltage doubling rectifier circuit are studied in detail by simulation. It can be concluded that the higher the working frequency of the transformer, the larger the stage capacitance, the larger the load resistance and the better the output voltage performance in a certain range. Based on this, a 2.5 MV voltage doubling rectifier circuit driven by a 120 kHz frequency transformer is designed, developed and tested for the power supply of the neutron source device towards BNCT. Experimental results show that this voltage doubling rectifier circuit can satisfy the design requirements, laying a certain foundation for the engineering design of DC high voltage power supply of neutron source device.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 춘계 학술발표회
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• pp.507-511
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• 2009

This paper describes the performance design requirements of the slope and soft clay structures to confirm several contents of foundations systems to change existing design code to new one in the construction market. The concepts of performance design explain systematical needs for specific performance guidelines.

• 디지털융복합연구
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• 제14권11호
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• pp.181-191
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• 2016

본 연구의 목적은 융 복합 시대에 자동차 전장부품인 자동차 고무 자바라를 생산하는 중소제조업체의 기업 경쟁력을 확보하기 위한 경영혁신에 대한 새로운 경영기법인 ISO9001품질경영시스템 요구사항 관점에서 고무자바라제품 생산기업의 경영성과를 분석하는데 있다. 이를 위해서, 자동차 부품 생산업체중, 고무 자바라 제품을 생산하는 업체를 대상으로 방문조사를 실시하였다. 연구결과, 첫째, 중소자동차 고무 자비라 부품업체에서 ISO 9001 품질경영 시스템의 4가지 핵심 요구사항 중, 경영자 책임과 자원관리가 경영성과에 긍정적 영향을 미치는 것으로 나타났다. 또한, 직급별로 차이를 조사한 결과, 상위 직급 집단은 경영자 책임이, 하위 직급 집단은 ISO 9001에 따른 품질경영에 대한 인식도가 저조한 것으로 나타났다. 이는 중소 자동차 전장부품인 자동차 고무 자바라 생산에 대한 개선 방향 컨설팅 지칭과 생산성 향상 전략 방안을 수립하는데 기여하게 될 것이다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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• pp.779-784
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• 2001

For electrical vehicles, switched reluctance drives present a promising alternative-compared to asynchronous and synchronous (permanent magnet) concepts. For these applications, a very wide field weakening range is a key issue. Other requirements include high torque output from a small machine and low current ripple at the DC-side without the use of bulky filters - when powered from fuel cells or advanced Lithium-Ion-batteries. A new converter and control strategy according to these requirements is presented and compared to existing designs. The comparison is done for a drive system with a continuous power rating of 30 to 40 kW.

• 기술혁신연구
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• 제13권2호
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• pp.1-22
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• 2005

This paper adopts an embeddedness perspective and discusses rationales for government intervention in relation to economic development. Looking at East Asian experiences with industrial and technology policy the paper examines the general requirements, specific areas of focus and appropriate techniques for industrial and technology policy. Eight generic policy requirements are identified, viz. government capacity; monitoring and adjustment; policy sequencing; incremental upgrading; progressive market reliance; performance-orientation; selectivity; and flexibility.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.540-543
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• 2006

LTPS TFT backplanes for AM OLED displays have advantages in regard to reliability and performance compared to TFT backplanes based on amorphous silicon. However, the requirements for homogeneous laser crystallization during LTPS process are much higher than for LCD backplanes. Most important is the energy stability of the laser source. In this paper we describe a new excimer laser which meets the requirements of LTPS manufacturing process with high homogeneity.