자코비안 행렬을 이용한 부하시 탭절환기의 협조제어

이송근 전주대학교 공학기술종합연구소 2002 전주대학교 공학기술종합연구소 학술논문집 Vol.8 No.1

A loop power system has a nonlinear characteristics. And it is very hard to analyze a system through a equation if a discontinuous characteristic of the Under Load Tap Changer(ULTC) is added to a system. In this paper, we used the Jacobian Matrix to resolve the coordinated control of the WTC in the loop power system. Also, in order to verify the validity of the proposed method, we applied it to a 11 bus system

段階圖 시뮬레이션 技法에 依한 柔軟生産시스템 (FMS)의 模型構成

李松根 관동대학교 기업경영연구소 1986 경영논집 Vol.4 No.-

Flexible manufacturing systems are frequently being modelled to obtain an understanding of their behavior, to in their design, to compare alternative operational decision rules, and to optimize some formulated objective function. A variety of types of models have been used including analytic queueing network models, hybrid simulation/analytic models, Petri Net models and simulation models. If a detailed model is required, a simulation model must usually be used. There are three commonly used world views in discrete event simulation modelling: activity-scanning, process-interaction, and event-scheduling. Graphical modelling techniques for the activity-scanning world view (activity wheel charts and activity life cycle diagrams) and for the process-interaction world view (block diagrams and process net-works) have been available for a considerable period of time. Recently (1983), Schruben developed event graphs as the first graphical modelling technique for the event-scheduling world view. Event graphs are directed graphs with the nodes being events and the directed edges being the relations between the events. Events change the values of the state variables and affect the occurece of future events. The purpose of this study is to illustrate the use of events graphs in modelling flexible manufacturing systems which are complex systems, consisting of many interconnected components of hardware and software. Considering the increasing importance of job shop production compared to mass production, the study of FMS should be continued.

EMTP를 이용한 154kV 변전소의 지상조상설비 영향 평가

이송근 전주대학교 공학기술종합연구소 1998 전주대학교 공학기술종합연구소 학술논문집 Vol.4 No.2

The reactive power supplier supplies reactive power in order to maintain the system voltage, as a result, the system increases the voltage stability and diminishes the power losses. Recently, the growing construction of the underground transmission cable on the area of the great cities provokes the increasing of the line charging. In the light load case, the line charging provokes a elevation of the bus voltage. In this paper the effect of the bus voltage to analysed in function of the line charging and the shunt reactor for 154kV substation using EMTP(electromagnetic Transient Pogram).

DRP에 의한 물적유통의 시스템화 /

이송근 大邱大學校 經商科學硏究所, 1986 經商科學 Vol.6 No.-

難解性 整數計劃問題의 풀이를 위한 分段探索法上의 弛緩技法과 分解技法에 관한 硏究 /

이송근 大邱大學校 經商科學硏究所, 1991 經商科學 Vol.12 No.-

竝列處理機械上에서 總作業完了時間의 最少化 /

이송근 大邱大學校 經商科學硏究所, 1989 經商科學 Vol.10 No.-

MRP시스템의下에서의 製品分析 및 注文量 決定에 관한 硏究

李松根 東亞大學校經營問題硏究所 1984 經營論叢 Vol.7 No.-

Marterials planning is a production and inventory control function found in virtually all manufacturing companies. Its objective is to manage and control inventories of the components and purchased parts or raw materials used in the manufacture or assembly of fimished products made for stock or made to order. Techniques used to control these inventories are based on two key characteristics of the demand for such components. First, since the products that require these components are usually made in lot quantities, demand for their components will occur in lumps at interuals. Second, the required quantities of these components can be calculated based on a forecast or prediction of the number of finished stock items requirded. Material requirements planning is an inventory control techniques specifically designed for use under these conditions of demand. Since the use of MRP typically requires the processing of significant amounts of data, the application of computers to manufacturing beginning in the late 1950s has greatly facilitated the application of this approach to inventory control. Comparing to the other industriallized countries, most managers on Korea are not well aware of the importance of the MRP system. As result, great inefficiencies and high costs are incurred from the uorrent inventory control svstems. This study is to evaluate models of product explosion and lot sizing techniques, with the special emphasis on the issue of whether it is possible to select one best lot sizing algorithm for a given manufacturing environment, for a class of items, and for a songle specific item. The result shows that it is meaningless to try to select the algorithm which can be the best in general cases. Rather, the relative effectiveness of a lot sizing algorithm can be determined only after considering various situational factors.

(A) Heuristic Algorithm for Nonpreemptive Scheduling to Minimize Makespan on Unequal Paralled Processors /

이송근 大邱大學校 經商科學硏究所, 1987 經商科學 Vol.8 No.-

Excel과 Matlab을 이용한 계통 분석 프로그램 개발

이송근 전주대학교 공학기술종합연구소 2002 전주대학교 공학기술종합연구소 학술논문집 Vol.8 No.1

Programs that analyse electric power system handle a lot of data. To record a lot of input data and a calculation results, spreed sheet calculation program becomes big help. Electric power system analysis programs become programs that use matrixes mainly. Because, there is an advantage that can express equation briefly by using matrix. In this paper, we used Microsoft's Excel to manipulate data. In addition, we used MathWork's Matlab to solve matrix problem. This means that we gather Matlab and Excel's advantage to develop the power system analysis program. Argued about strength and weakness of the program that we are developed in discussion.

기업혁신 특성유형과 자동차산업 사례

이송근,풍뢰 대구대학교 경제경영연구소 2006 경제경영연구 Vol.4 No.1

Technological change is the primary factors which influence the fate of organization. The enterprise which carry out the suitable technological innovation can survive in the market. There are two types of innovations. One is product innovation. The other is process innovation. Both product and process innovation are very important to the technological success of an enterprise. The first main purposes of this study is to expound the relationship between product innovation and process innovation. Secondly, the enterprises disposed to technological change divide into four types of organizations on the basis of the different innovation style. The four types are product innovation organization, process innovation organization, ambidextrous innovation organization and inertia organization. According to the different characteristics of the four types, we divides main motor vehicle enterprises in Korea, China and Japan into four type organizations: Honda Vehicle Corporation as product innovation central organization, Hyundai Vehicle Corporation and Shanghai Volkswagen Vehicle Corporation as process innovation central organization, Toyota Vehicle Corporation as ambidextrous innovation organization and Daewoo Vehicle Corporation as inertia organization. Then we can grasp each main vehicle corporation’s innovation style and technological strategy. Meanwhile the three country’s vehicle corporations' relative positions and competitive power orders can be comprehended. The result of this study is that ambidextrous innovation organization which perform well both radical innovation and process improvement is the most of a family competitive power, just like Toyota Vehicle Corporation. And the second competitive power organization is the product innovation central organization as Honda Vehicle Corporation, the third one is process innovation central organization as Hyundai Vehicle Corporation and Shanghai Volkswagen Vehicle Corporation. The last one is the inertia organization which is insensitive to changes or lives up to the successful formality of past. For example, Daewoo Vehicle Corporation fall under this category.