• 품질경영학회지
• /
• 제44권3호
• /
• pp.541-552
• /
• 2016

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.

• 한국융합학회논문지
• /
• 제12권2호
• /
• pp.279-285
• /
• 2021

소재·부품·장비 산업은 제조업의 허리이자 경쟁력의 핵심 요소가 되고 있다. 그러나 우리나라의 경우 핵심 소재·부품·장비를 해외에 의존하다 보니 산업경쟁력뿐만 아니라 안보적 측면에서도 커다란 위험 상황에 처하게 되었다. 본 연구는 먼저 소재·부품·장비 산업의 개요와 현주소를 살펴보고 그 문제점과 개선점을 파악하고 우리나라 소재·부품·장비의 국산화를 위한 그동안의 노력과 실적을 살펴보았다. 또한, 정부의 소재·부품·장비 산업에 대한 제도적인 차원이나 생태계적인 차원에서 그 개선방안을 살펴본 후 지역 소재·부품·장비의 국산화의 현황과 실태를 조사해보고 이에 따른 문제점과 개선점을 분석해 보았다. 마지막으로 본 연구는 지역 부품·소재 국산화를 위한 기술개발방안 및 사업화와 관련한 다양한 제도개선방안을 제시하였다.

• 항공우주시스템공학회지
• /
• 제1권3호
• /
• pp.13-20
• /
• 2007

The objective of this study is to investigate endurance test of localization part for T-50 aircraft engine. Major localization parts of the engine (F404-STW-102) was performed using Accelerated Simulated Mission Engine Test. The purpose of this test is to evaluate of quality demonstration capability, to verify design of engine localization parts, and to improvement safety and operation rate of T-50 advanced trainer by finding out operational problems in production phase and fixing it.

• 안보군사학연구
• /
• 통권15호
• /
• pp.117-151
• /
• 2018

The development of local defense parts has played a role a pure function such as maintenance of stable procurement source of military goods, provision of timely supply, establishment of self-defense base, creation of import substitution effect considering the whole life-cycle cost, reduction of foreign currency and protection of domestic defense industry. However, as the development success rate is deteriorating, it is time to analyze the related policies and improve the system. In order to improve the success rate of development of parts for the defense sector, it is necessary to unify the separated policies by the development-related departments and strengthen the policy support for the development companies to actively participate in the development. In addition, it is necessary to improve the paradigm for the selection of development items and change the authority of selecting development items and to delegate authority to create synergies. Parts localization development policy improvement is military support side it will contribute to strengthening defense power management by organically combining with technological development aspect and economical aspect. Development items will be linked to defense exports, which will have a remarkable effect on sales growth and job creation effects. The development of local defense parts is spreading.

• Nuclear Engineering and Technology
• /
• 제53권4호
• /
• pp.1199-1209
• /
• 2021

The detection of unexpected loose parts in the primary coolant system in a nuclear power plant remains an extremely important issue. It is essential to develop a methodology for the localization and mass estimation of loose parts owing to the high prediction error of conventional methods. An effective approach is presented for the localization and mass estimation of a loose part using machine-learning and deep-learning algorithms. First, a methodology was developed to estimate both the impact location and the mass of a loose part at the same times in a real structure in which geometric changes exist. Second, an impact database was constructed through a series of impact finite-element analyses (FEAs). Then, impact parameter prediction modes were generated for localization and mass estimation of a simulated metallic loose part using machine-learning algorithms (artificial neural network, Gaussian process, and support vector machine) and a deep-learning algorithm (convolutional neural network). The usefulness of the methodology was validated through blind tests, and the noise effect of the training data was also investigated. The high performance obtained in this study shows that the proposed methodology using an FEA-based database and deep learning is useful for localization and mass estimation of loose parts on site.

• 한국소음진동공학회논문집
• /
• 제26권4호
• /
• pp.483-491
• /
• 2016

Precision of theoretical group velocity of waves in shell structures was discussed for the purpose of source localization of loose parts impact in pressure vessels of nuclear power plants. Estimating exact location of loose parts impact inside a reactor or a steam generator is very important in safety management of a NPP. Evaluation of correct propagation velocity of impact signals in pressure vessels, most of which are shell structures, is essential in impact source localization. Theoretical group velocities of impact signals in a plate and a shell were calculated by wave equations and compared to the velocities measured experimentally in a plate specimen and a scale model of a nuclear reactor. The wave equation applicable to source localization algorithm in shell structures was chosen by the study.

• Journal of Computational Design and Engineering
• /
• 제2권4호
• /
• pp.248-252
• /
• 2015

Currently composite manufacturing process, such as linear friction welding plus NC machining, is the main method for the manufacturing and repairing of complex parts with integrated structure. Due to different datum position and inevitable distortion from different processes, it is important to ensure sufficient machining allowance for complex parts during the NC machining process. In this paper, a workpiece localization approach for machining allowance optimization of complex parts based on CMM inspection is developed. This technique concerns an alignment process to ensure sufficient stock allowance for the single parts as well as the whole integrated parts. The mathematical model of the constrained alignment is firstly established, and then the symmetric block solution strategy is proposed to solve the optimization model. Experiment result shows that the approach is appropriate and feasible to distribute the machining allowance for the single and whole parts for adaptive machining of complex parts.

• 조명전기설비학회논문지
• /
• 제30권1호
• /
• pp.87-95
• /
• 2016

Recently, the interests of the precise localization are rapidly increasing, which are linked to IoT(Internet of Things) sensors. The precise localization in indoor environment can be utilized in navigation, security, anti-collision, and various location based services etc. However, conventional positioning sensors, such as PIR, ultrasonic, microwave etc. are vulnerable to weather or insensitive to direction of subject movement or low precision performance. In this paper we implement a UWB-IR localization system for long distance and high-precision localization, which is not affected by temperature, light and weather. The proposed system was divided and designed by H/W, Antenna, S/W parts, each of which was designed based on an accurate analysis and simulation. As a result, we can implemented and verified UWB IR system with precise localization performance.

• 한국산학기술학회논문지
• /
• 제21권1호
• /
• pp.35-44
• /
• 2020

본 연구는 국방기술품질원이 수행하는 핵심부품 국산화개발 지원사업의 제안요청서 정교화를 목적으로 한다. 제안요청서는 사업의 공고와 개발업체 선정, 개발품의 설계와 시험, 사업의 최종 평가와 규격화 등 부품국산화 사업의 전반에 걸쳐 가장 중요한 문서이다. 하지만 제안요청서가 사업 초기에 정교화 되지 않을 경우, 다양한 사유로 인해 잦은 변경이 이루어지면서 사업 실패의 위험이 증가하는 문제가 있다. 본 연구에서는 이러한 제안요청서의 정교화 필요성을 인지하고, 정량적인 정교화를 위해 AHP 기법을 적용하였다. 국산화개발품의 기계적/전기적 성능과 관련된 제안요청서의 8가지 요구사항과 각 요구사항별 3가지 정교화 방안을 계층화 구조로 설계하였고, 5점 척도의 AHP 기법을 적용하여 각각의 가중치를 산출하였다. AHP 설문조사는 부품국산화 사업에 참여하는 개발업체 인원 20명을 대상으로 실시되었고, AHP 설문결과의 일관성비율이 0.1 이하의 유효한 수준으로 나타났다. 산출된 가중치 중 가장 높은 값을 갖는 정교화 방안을 분류하고, 해당 정교화 방안의 해석 결과와 향후 연구방향을 제시하였다.

• 한국산학기술학회논문지
• /
• 제22권6호
• /
• pp.524-533
• /
• 2021

최근 무기체계 핵심부품 개발 필요성 증가 등으로 인해 무기체계 부품국산화 개발사업이 확대되고 있다. 개발된 핵심부품의 국내 무기체계 적용 및 해외시장 진출을 위해 사전 기술동향을 반영한 과제기획이 필요한 실정이다. 이에 본 연구는 무기체계 핵심부품 국산화 대상과제의 특허 조사 및 분석을 통한 부품국산화 개발기술 동향을 도출하였다. 또한 개발기술 동향 분석결과를 과제 선정 시 활용하기 위한 구체적인 방안을 제시하였다. 연구의 세부 추진 방법으로 2019년 선정된 과제 관련 특허를 조사하여, 최초 출원 시점부터 현재까지의 특허의 연도별 출원수, 출원인수를 분석하였다. 이를 종합하여 시계열에 따른 기술시장 성장단계를 도출하였다. 2019년 과제선정 시 산출된 선정기준 가중치를 이용하여 기술시장 성장단계와 부품국산화 과제선정 기준을 양축으로 하는 Matrix를 구성하였다. 각 영역별 배치된 부품국산화 기술의 포트폴리오 분석을 실시하였으며, 그 결과 Matrix 영역별 기술을 배치하고 해당 영역의 종합적인 기술동향을 분석하였다. 향후 효과적인 과제기획을 위해 기술동향 분석결과의 활용을 위한 절차개선 방안을 제안하였으며, 이를 통한 효율적인 과제기획 및 효과적인 국내 방위산업 중소기업 육성지원이 기대된다.