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시스템엔지니어링 방법론을 적용한 소프트웨어 테스트 케이스 개발에 관한 연구
살림셀리,신중욱,김진일,Salim, Shelly,Shin, Junguk,Kim, Jinil 한국시스템엔지니어링학회 2018 시스템엔지니어링학술지 Vol.14 No.2
Software has become an integral part of almost any system, triggered by the ever-growing demand for automation and artificial intelligent throughout engineering domains. The complexities of software-centric systems are also increasing, which make software test efforts become essential in software development projects. In this study, we applied systems engineering methodology in generating software test cases. We found out the similarities between requirements analysis and traceability concept of systems engineering and test specification contents of software test. In terms of acceptance test, software test cases could be considered as validation requirements. We also suggested a method to determine test order using a SysML modeling tool.
모델 기반 중소형 플랜트 형상관리 시스템의 효과성 평가 사례
하가연,김진일,신중욱,염충섭,Ha, Ga Yeon,Kim, Jinil,Shin, Junguk,Yeom, Choong Sub 한국시스템엔지니어링학회 2021 시스템엔지니어링학술지 Vol.17 No.1
Plant Configuration Management(CM) is an activity to maintain consistency of design requirements, physical configuration, facility configuration information throughout the life cycle of the plant by systematically managing changes that occur during the plant design and operation process. Conformity between information must be ensured not only in the design stage, but also in the case of design changes in the operation and maintenance stages, and thus a computer system capable of efficiently managing them is required. In particular, in consideration of an application to small and medium-sized domestic plants, a computer system that can support configuration management at a low cost is needed. Accordingly, in this study, a configuration management system has been developed to support the management of plant design information and change procedures in the operation stage of small and medium-sized plants. Here, a case for quantitatively evaluating the effectiveness of the developed system is described.
MTS를 이용한 가압기 압력 제어 계통의 조기 고장 감지에 대한 연구
차재민,김준영,신중욱,염충섭,강성기,Cha, Jae-Min,Kim, Joon-Young,Shin, Junguk,Yeom, Choongseob,Kang, Seong-Ki 한국통계학회 2016 응용통계연구 Vol.29 No.7
원자력 발전소의 가압기는 1차 계통의 냉각재가 고온에서도 기화되지 않도록 압력을 가해주는 장치이다. 즉, 가압기의 고장은 원자력 발전소에 큰 영향을 미칠 수 있으며, 따라서, 가압기의 조기 고장 감지는 원자력 발전소의 안전에 매우 중요하다. 이를 위해, 본 연구에서는 마할라노비스 거리 개념과 다구찌 품질 공학 이론에 기반한 패턴 분류 인식 알고리즘 중 하나인 마할라노비스 다구찌 시스템(MTS)을 가압기 압력 제어 계통의 조기 고장 감지에 적용하였다. MTS의 고장 감지 성능을 검증하기 위해, 실제 원자력 발전소에서 발생하고 있는 가압기 압력전송기 고장 시나리오를 대상으로 하여, Full Scope 시뮬레이터를 통해 모사된 데이터에 적용하였다. 실험 결과, MTS는 단일 센서모니터링 기반의 전통적인 고장 감지에 비하여 매우 빠르게 고장을 감지할 수 있었다. A pressurizer is a major equipment system in a nuclear power plant (NPP) and controls the reactor cooling system pressure within the allowable range. Faults in the pressurizer can be critical to the NPP; therefore, early fault detection in the pressurizer is significant for NPP safety. This study applies Mahalanobis Taguchi system (MTS), which is one of the promising pattern classification methods, based on the Mahalanobis distance concept and Taguchi quality engineering theory to the early fault detection problem of the pressurizer pressure control system. We conducted experiments using data from full scope NPP simulator based on a pressurizer pressure transmitter faults scenario to validate the faults detection performance of MTS. As a result, MTS can rapidly detect the faults compared to conventional faults detection based on single sensor monitoring.
원전 상태 감시 및 조기 경보용 빅데이터 시범 플랫폼의 설계를 위한 시스템 엔지니어링 방법론 적용 연구
차재민,손충연,황동식,신중욱,염충섭,Cha, Jae-Min,Shin, Junguk,Son, Choong-Yeon,Hwang, Dong-Sik,Yeom, Choong Sub 한국시스템엔지니어링학회 2015 시스템엔지니어링학술지 Vol.11 No.2
With the era of big data, the big data has been expected to have a large impact in the NPP safety areas. Although high interests of the big data for the NPP safety, only a limited researches concerning this issue are revealed. Especially, researches on the logical/physical structure and systematic design methods for the big data platform for the NPP safety were not dealt with. In this research, we design a new big data pilot platform for the NPP safety especially focusing on health monitoring and early warning services. For this, we propose a tailored design process based on SE approaches to manage inherent high complexities of the platform design. The proposed design process is consist of several steps from elicitate stakeholders to integration test via define operational concept and scenarios, and system requirements, design a conceptual functional architecture, select alternative physical modules for the derived functions and assess the applicability of the alternative modules, design a conceptual physical architecture, implement and integrate the physical modules. From the design process, this paper covers until the conceptual physical architecture design. In the following paper, the rest of the design process and results of the field test will be shown.
이태경,차재민,김준영,신중욱,김진일,염충섭,Lee, Taekyong,Cha, Jae-Min,Kim, Jun-Young,Shin, Junguk,Kim, Jinil,Yeom, Choongsub 한국시스템엔지니어링학회 2017 시스템엔지니어링학술지 Vol.13 No.2
Implementation of Model-based Systems Engineering(MBSE) depends on a model supporting efficient communication among engineers from various domains. And SysML is designed to create models supporting MBSE but unfortunately, SysML itself is not practical enough to be used in real-world engineering projects. SysML is designed to express generic systems and requires specialized knowledge, so a model written in SysML is less capable of supporting communication between a systems engineer and a sub-system engineer. Domain Specific Languages(DSL) can be a great solution to overcome the weakness of the standard SysML. A SysML based DSL means a customized SysML for a specific engineering domain. Unfortunately, current researches on SysML Domain Specific Language(DSL) for the plant engineering industry are still on the early stage. So as the first step, we have developed our own SysML based Piping & Instrumentation Diagram (P&ID) creation environment and P&ID itself of a specific plant system, using a widely used SysML authoring tool called MagicDraw. P&ID is one of the most critical output during the plant design phase, which contains all information required for the plant construction phase. So a SysML based P&ID has a great potential to enhance the communication among plant engineers of various disciplines.
마할라노비스 다구찌 시스템의 다중 클래스 분류 성능 향상을 위한 새로운 방법
차재민(Jae-Min Cha),김준영(Joon-Young Kim),신중욱(Junguk Shin),염충섭(Choongsub Yeom) 한국IT서비스학회 2016 한국IT서비스학회 학술대회 논문집 Vol.2016 No.추계
Classification between normal and abnormal status of system is one of the important problems in all the industry. Mahalanobis Taguchi System(MTS) that is one of the pattern classification techniques based on mahalanobis distance concept and taguchi quality engineering theory is very efficient for singleclass classification problems; however, it has limitation of accuracy in multiclass classification problems. To overcome this limitation, this study proposes Simultaneous MTS(S-MTS) expanding the concept of the MTS. In the MTS, a single mahalanobis space of normal group is established; however, several mahalanobis spaces per reference group are established in the S-MTS. To validate the performance of the S-MTS, we applied the MTS and the S-MTS to the iris classification problem that is one of the most commonly used pattern classification problems. As a result, the MTS and S-MTS show 96% and 100% of classification accuracy respectively.