유도무기체계 품질 및 신뢰성 제고를 위한 개발단계 국방규격화 프로세스 개선 방안

조유습,김장은,윤재형,김시옥,이수림,Cho, Yu-Seup,Kim, Jang-Eun,Yoon, Jae-Hyoung,Kim, Si-Ok,Lee, Su-Lim 한국항공운항학회 2017 한국항공운항학회지 Vol.25 No.3

To achieve designed quality and reliability from R&D to force integration, an establishment of precise and distinct specifications and standards are required. However, the recent process of R&D standardization on defense acquisition system, has brought plenty of corrections on specifications and standards that may cause not only difficulties to production line and retardation to the military forces, but also a degradation of provided weapon systems. Therefore, a technical review should be performed by the developer, the producer, and the client, establishing the standard that include mass production requirements as well as clients' requirements. This paper propose a specified solution on process of R&D standardization, by applying a substantial FCA(Functional Configuration Audit) and PCA(Physical Configuration Audit) which implies participation of related agencies. By the improved PCA, 2,023 corrections on 74 types of QAR(Quality Assurance Requirement)s and 12,715 corrections on drawings are identified.

트렌치 게이트를 이용한 Floating Island IGBT의 전기적 특성에 관한 고찰

조유습,정은식,오금미,성만영,Cho, Yu-Seup,Jung, Eun-Sik,Oh, Kum-Mi,Sung, Man-Young 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.4

IGBT (insulated gate bipolar transistor) has been widely used around the power industry as it has good switching performance and its excellent conductance. In order to reduce power loss during switch turn-on state, it is essential to reduce its resistance. However, trade off relationship between breakdown voltage and device conductance is the greatest obstacle on the way of improvement. Floating island structure is one of the solutions. Still, under optimized device condition for the best performance, improvement rate is negligible. Therefore, this paper suggests adding trench gate on floating island structure to eliminate JFET (junction field effect transistor) area to reduce resistance and activate floating island effect. Experimental result by 2D simulation using TCAD, shows 20% improvement of turn-on state voltage drop.

단일 Floating Island 구조 Power MOSFET의 전기적 특성 향상과 설계 파라미터에 관한 연구

조유습,성만영,Cho, Yu Seup,Sung, Man Young 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.4

Power MOSFETs (metal oxide semiconductor field effect transistor) operate as energy control semiconductor switches. In order to reduce energy loss of the device, it is essential to increase its conductance. However, a trade-off relationship between the breakdown voltage and conductance of the device have been the critical difficulty to improve. In this paper, theoretical analysis of electrical benefits on single floating island power MOSFET is proposed. By the method, the optimization point has set defining the doping limit under single floating island structure. The numerical multiple 2.22 was obtained which indicates the doping limit of the original device, improving its ON state voltage drop by 45%.

국제 표준 기반 무기체계 부품국산화 체계공학 개발관리 절차 적용 연구

김장은 ( Jang-eun Kim ),조유습 ( Yu-seup Cho ),나재현 ( Jae-hyun Na ),성인철 ( In-chul Sung ) 한국품질경영학회 2016 한국품질경영학회 학술대회 Vol.2016 No.2

특허 자료 정보 기반 국내 이동통신 사업자 주요 공통 기술 분야 분석

김장은(Jang-Eun Kim),조유습(Yu-Seup Cho),김영래(Young-Rae Kim) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.5

국가 기술표준정책 결정시 국가 정책 활동/시장경제 활동 수단으로 활용하기 위해 현재 자국 기술 수준/집중도/활용도에 대한 분석을 통한 의사결정을 수행해야 한다. 이러한 의사결정의 수단으로 국내 이동통신 사업자 특허 자료 기반 주요 공통 기술 분야 분석을 통해 합리적인 의사결정을 수행할 수 있다. 특허청 특허정보검색서비스를 통해 수집된 국내 이동통신사업자 전체 특허/국제특허분류 수는 20,294건/152개이며, 이동통신 사업자 특허자료 일반 정보 분석 결과 상대적으로 높은 기술보유 활동을 수행하는 사업자는 KT(9,738건/47.98%)이다. 이어서 사회망 분석결과 연결중심성(0.552)/근접중심성(1.000)/매개중심성(0.290)이 큰 국제특허분류 30개 추출, 주성분 분석 결과 분산 평균 크기 3.2222 이상 넘어가는 국제특허분류 4개 (H04W, H04B, G06Q, H04L) 추출을 통해 국내 이동통신 사업자 공통 기술 분야임을 확인했다. 마지막으로, 추출된 국내 이동통신 사업자 공통 기술 분야 4개에 대한 자기회귀 결합 이동평균 모형 분석 결과 H04W, H04B, G06Q, H04L 모두 12개월의 계절성 특성을 가지며, 기존 시계열 자료 평균 대비 예측 평균이 낮아짐을 확인했다. In order to decide the national technical standards policy for national policy/market economy activities, the people in charge commonly make policy decisions based on the current technology level/concentration/utilization by means of major common technology field analysis using patent data. One possible source of such patent data is the domestic mobile carriers through the Korea Intellectual Property Rights Information System (KIPRIS) of the Korean Intellectual Property Office (KIPO). Using this system, we collected 20,294 patents and 152 International Patent Classification (IPC) types and confirmed KTs (9,738 cases / 47.98%), which perform relatively high technology retention activities compared to other mobile carriers through the KIPRIS of KIPO. Based on these data, we performed three analyses (SNA, PCA, ARIMA) and extracted 30 IPC types from the SNA and 4 IPC types from the PCA. Based on the above analysis results, we confirmed that 4 IPC (H04W, H04B, G06Q, H04L) types are the major common technology field of the domestic mobile carriers. Finally, the number of 4 IPC (H04W, H04B, G06Q, H04L) forecast averages of the ARIMA forecast result is lower than the number of existing time series patent data averages.

특허 자료 정보 기반 국내 통신전자 방산업체 대표 기술 분야 분석

김장은(Jang-Eun Kim),조유습(Yu-Seup Cho) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.4

고객이요구하는 지휘통제․통신무기체계기술 수준 요구와무기체계개발을 통한 국내기술 수준 향상및 핵심기술확보가 필요하다. 이러한 무기체계 획득 방향을 고려한 의사결정으로 국내 지휘통제․통신무기체계 방산업체 특허 자료를 기반으로 기술분석/평가를 수행/활용 할 수 있다. 지휘통제․통신무기체계 관련 방산업체의 특허 자료 수집 방법은 방위사업법 제35조(방산업체의 지정등)에 따라 지정된 11개 주요방산업체와 9개 일반방산업체의 특허자료를 특허청 특허정보검색서비스를 통해 수집할 수 있다. 수집된 전체 특허/국제특허분류 수는 1,526건/134개이며, 통신전자 방산업체 특허자료 일반정보 분석 결과 평균 11.39개 이상 출원한 국제특허분류는 27개, 주성분 분석 결과 분산 평균 크기 10.01 이상 넘어가는 국제특허분류 19개, 네트워크 분석 결과 각 평균(연결중심성 : 58.42 / 근접중심성 : 93.44 / 매개중심성 : 2.02) 이상 넘어가는 국제특허분류 13개임을 확인했다. 본 분석 결과를 기반으로 공통으로 나타난 국제특허분류 8개(F41A, F41G, G06F, G01S, H04B, H04L, H04M, H04W)를 통해 국내 통신전자 분야 20개 방산업체 대표 기술 분야임을 확인했다. In order to make a decision about the acquisition of command control·communication weapon systems considering the client"s technology level requirements, the improvement of the domestic technology level and security of core technology, the person in charge can perform technology evaluation/analysis based on command control·communication weapon system patent data. As a method of collecting such patent data, we can collect the patent data of government-designated (Defense Acquisition Program Act Article 35) companies (11 Major defense companies/9 General defense companies) through the Korea Intellectual Property Rights Information System (KIPRIS) of the Korean Intellectual Property Office (KIPO) In this way, we collected 1,526 patents and 134 International Patent Classification (IPC) types through the KIPRIS of the KIPO. Based on these data, we performed three types of analysis, General information analysis, Principal Components Analysis (PCA) and Network analysis, and extracted 27, 19 and 13 IPC types from them, respectively. Based on the above three analysis results, we confirmed 8 IPC types (F41A, F41G, G06F, G01S, H04B, H04L, H04M and H04W) as the key technologies and representative technology fields of domestic communication-electronics defense companies.

P28~P48 경영품질/품질경영 : 67. ; 전차/장갑차 전장관리체계 중심 ess 절차 표준화 연구

김장은 ( Jang Eun Kim ),김용환 ( Yong Hwan Kim ),정윤식 ( Yun Sik Jung ),조유습 ( Yu Seup Cho ) 한국품질경영학회 2015 한국품질경영학회 학술대회 Vol.2015 No.1

ISO/IEC/IEEE 15288 기반 양산단계 무기체계 부품국산화 체계공학 개발관리 절차 적용 연구

김장은 ( Jang Eun Kim ),심보현 ( Bo Hyun Shim ),조유습 ( Yu Seup Cho ),성인철 ( In Chul Sung ),한동석 ( Dong Seog Han ) 한국품질경영학회 2016 품질경영학회지 Vol.44 No.3

Purpose: In this study, we propose that how to approach a effective system engineering and optimize system engineering management process for the mass production weapon system parts localization development process and success in DTaQ. Methods: To approach a effective system engineering for the mass production weapon system parts localization, we analyze a weapon system acquisition process and system engineering process of Republic of Korea and DTaQ parts localization business regulations in advance. after results of analysis of them, we implement a optimized parts localization development system engineering based on ISO/IEC/IEEE 15288. Results: In order to apply International Standard ISO/IEC/IEEE 15288 to the mass production weapon system parts localization development process, we compare the mass production weapon system parts localization acquisition environment with ISO/IEC/IEEE 15288 and analyze them. therefore, It is possible to implement a part of concept stage and development stage of ISO/IEC/IEEE total life cycle stage for the mass production weapon system parts localization development process. To achieve the technical review milestones of DTaQ parts localization business regulations in the selected stages of ISO/IEC/IEEE, the development and management agency perform 2 high rank process and 19 low rank process specified in ISO/IEC/IEEE. Conclusion: When the development and management agency perform the mass production weapon system parts localization development using the proposed system engineering approach, they should easily meet milestone through the clarified requirement and simplified System Engineering output documents in limited development period.