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이정완,장중순,Lee, Jeong-Wan,Jang, Joong Soon 한국시뮬레이션학회 2020 한국시뮬레이션학회 논문지 Vol.29 No.1
임무신뢰도란 제품개발 시 목표가 되었던 요구조건하에서 임무를 완수할 확률을 나타내며, 전투체계의 경우 상용 장비와 달리 임무신뢰도가 승패를 좌우할 중요한 요소이다. 기존의 국내 전투체계의 임무신뢰도는 임무수행에 연관된 장비의 물리적 연결만을 고려해 산출되었으나, 장비들이 점차 고도화되어지고 복잡해져 물리적 연결만으로 임무연관성 판단이 불가하다. 이에 따라 본 논문에서는 물리적 연결뿐만 아니라 기능적 연결을 고려한 방법으로 시스템 설계모델링 언어인 SysML을 활용하여 정확도가 향상된 임무신뢰도를 산출하였다. 본 연구결과를 바탕으로 향후 개발되는 전투체계 임무신뢰도 검증자료로 활용 되기를 기대한다. Mission reliability is defined by the probability of accomplishing the requirements task that were targeted in product development, and in the case of combat systems, mission reliability is an important factor that will determine victory or defeat, unlike commercial equipment. The mission reliability of the existing domestic combat system was calculated by considering only the physical connections of the equipment involved in the mission performance, but as the equipment becomes increasingly sophisticated and complex, it is impossible to determine the mission relevance solely by physical connection. Thus, in this paper, improved mission reliability was calculated using SysML, the system design modeling language, by taking into account the functional connection as well as physical connection. Based on this research, we look forward that the mission reliability of the combat system that will be developed in the future will be used as a verification material.
레고블록형 설계와 상호작용 시각화를 통한 신뢰성 설계 방안 연구
이정완 ( Jeongwan Lee ),박찬현 ( Chanhyeon Park ) 한국국방기술학회 2022 한국국방기술학회 논문지 Vol.4 No.4
본 연구에서는 무기체계를 구성하는 장비 설계 시 신뢰성과 효율성을 동시에 높이기 위한 레고블록형 설계 방법과 상호작용 영향도 시험 방안을 제안하였다. 실제 함정전투체계의 적용 사례를 바탕으로 레고블록형 설계와 상호작용 영향도 시험의 활용 가능성을 확인하였으며 그 결과 현재 환경시험에서 상호작용에 의한 고장을 56%나 줄일 수 있음을 검증하였다. 환경시험을 완료한 장비에 대해서는 야전 배치 이후 고장 이력을 분석한 결과 장비의 50%가 상호작용에 의한 고장으로 파악되어 환경시험 이후의 상호작용에 의한 고장도 예측이 가능할 것으로 기대되며, 야전 정비 비용 절약과 동시에 무기체계의 신뢰도 향상에 기여가 가능함을 확인하였다. The goal of this study of to improve the method of predicting and preventing interaction between parts and modules of unit equipment in advance as a countermeasure against interaction, and also to conduct research on efficient design methods rather than traditional TAAF methods. based on the actual case of Shipboard Combat System, the applicability of the Lego Block type Architecture and Interaction Visualization interaction and in/out test was confirmed. it was verified that interaction failures can be reduced by 56% in the current environmental test. As a result of analyzing the failure history after the field shipboard combat system, 50% of the equipment is identified as interaction failure, and it is expect that the interaction failure after the environmental test cab be predicted, and it can contribute to reducing the field maintenance cost and improving the reliability of the weapon systems.
불확실성을 갖는 단일입출력 시스템에 대한 TDC의 안정성/강인성 해석
이정완(Lee Jeong Wan) 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.1
Time Delay Control (TDC) method was proposed as a promising technique in the robust control area. where the plants have unknown dynamics with parameter variations and substantial disturbances are present. In this paper, based on the concepts of TDC, author propose a model reference control method for input/output model. The stability and robustness of the closed system has been analyzed for a class of linear time invarient (LTI) system. Then, in a simulation study, author’s design method has been applied to a second order system, the result of which confirmed that the proposed control method performs satisfactorily as predicted.
이정완(Jeong-Wan Lee),강신유(Shin-You Kang) 한국산업융합학회 2004 한국산업융합학회 논문집 Vol.7 No.2
본 논문에서는 시간지연 제어기와 관측기를 사용하여 산업용 로봇을 위한 고속 제어 방법을 설계하였다. 설계된 방법은 로봇의 매개변수 변화나 비선형이 존재하는 상황에서도 강인한 제어성능을 보이게끔 개발되었으며, 실제구현을 하였을 때도 계산량이 적으면서 동시에 구현이 쉬운 방법이다. 평면 2 자유도 스카라 로봇의 적용을 통하여 실험을 하였는데, 그 결과 실제 시스템에 효과적으로 적용될 수 있음 확인하였다.
밀폐공간 질식재해 자료 분석을 통한 질식재해 요인 분석 (2005-2015)
이정완 ( Jung Wan Lee ),김태형 ( Tae Hyeung Kim ),하현철 ( Hyun Chul Ha ),박승욱 ( Cheng Xu Piao ),안광석 ( Kwangseog Ahn ) 한국산업보건학회 (구 한국산업위생학회) 2016 한국산업보건학회지 Vol.26 No.4
Objectives: Despite recent efforts to prevent suffocation disasters, a number of confined space accidents still happen and each year deaths continue to occur. There have been insufficient studies on the dangers of various potential disaster sites, such as manholes, septic tanks, reactors, and other tanks according to type, characteristics, task-specific disasters, equipment specific disasters, etc. The purpose of this study was to analyze recent suffocation disasters based on place and properties. Methods: In this study, we analyzed confined space accident cases from 2005 to 2015 in Korea and grouped them by type, size, monthly occurrence, continuous service period, accident location, person-specific group, age, employment, structural work and subcontracting work. We studied examples of accidents developed in other countries. Results: (1) We reviewed confined-space accident statistics, compared legal standards and analyzed cases of suffocation accidents in the United States and Japan. (2) Using a case study report from the Korea Occupational Safety & Health Agency, we specified confined-space accident statistics based on place, person-specific group, age, employment, structural work and subcontracting work. As a result we generated some precautions about confined-space accidents for the prevention of such accidents. Conclusions: Conclusions: Statistical analysis of recent suffocation disaster cases was performed to establish improvement measures, compare practices from developed countries, and develop precautionary measures accordingly. In this study, we presented the causes of disaster that occur in a confined space and proposed related preventive measures.