• 대한산업공학회지
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• 제24권1호
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• pp.1-9
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• 1998

In a competitive environment, systems design should be agile to accomplish business goal. However, there are often significant problems with systems design that is manifested in the fact that there are no current techniques to apply rigorous mathematics to semantic conveyance in the design framework. As a promising solution, this paper introduces situation theory (ST) and provides an application of ST for information flow in manufacturing systems design (IDEF0). The described work in this paper addresses the procedure of creation of IAST Model (Inf-Act On in Situation Theory) which is the first application of ST in engineering fields. Finally, we show that IAST Model is very helpful for effective information capturing in systems by comparison existing methodology with developed methodology as a practical application of ST.

• International Journal of Control, Automation, and Systems
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• 제5권6호
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• pp.712-717
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• 2007

This paper is concerned with the problem of state feedback control of continuous-time nonlinear Markovian jump systems, which are represented by Takagi-Sugeno fuzzy models. A new method for designing state feedback stabilizing controllers is presented in terms of solvability of a set of linear matrix inequalities (LMIs), and it is shown that the new design method provides better or at least the same results of the existing method in the literature. Finally, a numerical example is given to illustrate the effectiveness of the proposed method.

• 정보저장시스템학회논문집
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• 제1권2호
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• pp.137-142
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• 2005

In this paper, we propose a new servo system design strategy to reduce the position error signal(PES) and track mis-registration(TMR) in magnetic disk drive systems. The proposed method provides a systematic design procedure based on the plant model and an optimal solution via an optimization with a 'Robust Random Neighborhood Search(RRNS)' algorithm. In addition, it guarantees the minimum PES level as well as stability to parametric uncertainties. Furthermore, the proposed method can be used to estimate the performance at the design stage and thus can reduce the cost and time for the design of the next generation product. The reduction of PES as well as robust stability is demonstrated by simulation and experiments.

• 한국CDE학회논문집
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• 제3권4호
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• pp.251-259
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• 1998

Currently a hot potato in industries is to reduce the lifecycle of product and maximize the time-to-market benefits. A lot of methodologies and the concrete systems are in use for performing this function. One of these systems is that process are reconstructed by BPR and systems are implemented by PDM. First of all, th analyses of existing product, process and resource data must be preceded. New process is established on the basis of the analyzed information of a company and PDM implements the new process in the company. The consecutive activities like this provide the basic environment for CIM. However, the current system have been developed on the favor of a big company. There are many problems in applying it too a mid-sized company. A lot of function in a PDM tool is not necessary for the mid-sized CIM characteristic. The purpose of this study is to define the ROPP information model that is an appropriate information integration for a design process. The model shows an associated complicated information of a company effectively. Also the modeler makes it possible to manage consistently the constraints of design process on the basis of the analysis of dependency among each resource.

• 시스템엔지니어링학술지
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• 제3권1호
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• pp.17-26
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• 2007

This paper presents a design methodology for developing a new cellular phone configuration. A case study is performed using robust design process to satisfy predicted needs from new customers under the requirement analysis process. Diagrams and selection matrices are drawn by using several useful system engineering methods. This paper presents the optimal LCD panel size of cellular phone. A structural analysis has been carried out to compare the deformation of LCD panel thickness at specific conditions by using ANSYS application tool. This entire design result can support the configuration and quality improvements for a new product for new customers.

• 산업경영시스템학회지
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• 제23권56호
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• pp.35-43
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• 2000

In order to obtain rigorous systems analysis and design, it is essential to understand accurate information flow in the system. For the effective capturing of accurate information flow in a system, it Is vital to control information flow in the system. Also, information and information flow have to be simplified as a deliverable form. This paper presents partitioning and conveyance technique based on the application of situation theory. First, historical background of situation theory will be given. Then necessary conditions and definitions will be provided. Lastly, this paper provides specific technique with example. This introduced technique will be a powerful tool for sharing timely and relevant information in a complex manufacturing system that can be used continuously and efficiently throughout systems operation.

• Asia pacific journal of information systems
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• 제8권2호
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• pp.1-18
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• 1998

As the management and preservation of the environment become an important social issue, information required to support environmental task is required. So, there is an increasing demand for environmental information and appropriate systems to manage it. The vast volume of environmental data is distributed in different knowledge domains and systems. Environmental data objects have the complex structure containing environmental quality data and attribute data. Environmental information systems must be able to address these properties. This research has aimed at constructing well-defined schema design of environmental data, and making system architecture that environmental data kept by authorities should be made available to the public user. There are 3 major components in environmental information systems architecture ; User interface, Catalog libraries, Communication Provider. Web browsers provide consistent and intuitive user interfaces on Internet. The communication provider is a collection of diverse CGI functions. The main roles of the CGIs are to build interfaces between the Web, databases. Catalog libraries is libraries of various matadata including administration matadata. Administration matadata support the environmental administration and the managerial aspects of environmental data rather than explain a database itself or its properties.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.429-432
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• 1998

This paper is to design stable fuzzy controller so as to control chaotic nonlinear systems effectively via fuzzy control system and Parallel Distributed Compensation (PDC) design. To design fuzzy control system, nonlinear systems are represented by Takagi-sugeno(TS) fuzzy models. The PDC is employed to design fuzzy controllers from the TS fuzzy models. The stability analysis and control design problems is to find a common Lyapunov function for a set of linear matrix inequalitys(LMIs). The designed fuzzy controller is applied to Rossler system. The simulation results show the effectiveness of our controller.

• Journal of Multimedia Information System
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• 제4권3호
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• pp.157-162
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• 2017

The title of this project is "A Simple Interactive 3D Interior Design Application for Living Room - Cost Management", focusing on developing an application that enables costing and designing to be executed concurrently in interior design phases. This is because any changes made at costing phase after design phase is completed, it will potentially lead to unnecessary increase in cost and time. Therefore, the objective of this project is aimed to devise a cost management module to be included in the proposed application, allowing interior designer to make cost-based decision at the designing phase itself. This can be achieved through its proposed functions which include total cost update, budget management, cost estimator calculator and material list generation. The methodology being proposed in this project is Prototyping Development, categorized under Rapid Application Development (RAD), by starting off with planning, analysis, design and implementation phases are performed concurrently and repeatedly in a cycle to produce a prototype until the application is completed. In the end of this project, the developed prototype is expected to contribute a better solution towards cost management in interior design.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.725-730
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• 2005

The problem of managing digital design data including drawings, specifications and other technical data in building design and construction units is a real challenge, especially when there is a need to structure the design information across building design companies. The main difficulty in this information management is the shortage of unified rules (or standards) on how the digital design data should be gathered, archived, and preserved in the most efficient way for building design and construction units. The most important issue, which addressed in this work, is the standardized reference of all design data definitions.