• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
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• pp.631-634
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• 1996

This paper describes an intelligent user interface to define simulation models from the process and resource models. It also explains an automatic program generator of discrete event simulation model for shop floor control in a flexible manufacturing system. Especially, the paper is focused on the design and development of methodology to automate simulation modeling from the system description. Describing a shop floor control system in simulation is not an easy task since it must resolve various decision problems such as deadlock resolution, part dispatching, resource conflict resolution, etc. The program generator should be capable of constructing a complete discrete simulation models for a multi-product and multi-stage flow shop containing the above mentioned problems.

• 한국농공학회지
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• 제37권2호
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• pp.21-30
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• 1995

In order to save time and efforts in generating finite element meshes in irregular houndaries of domains, it is needed to develop an automatic mesh-generator which can hoth promote the accuracy of solutions and reduce the run-time in operating finite ele- ment models. In this study, the advancing front technique of triangular mesh generation and the transforming technique from triangular meshes to quadrilateral meshes were used to de- velop a computer program for the automatic triangular and quadrilateral meshes in the mixed shape. Furthermore, to enhance the quadrilateral mesh quality, the techniques of Laplancian smoothing and interior mesh modification were employed. The mesh genera- tor was applied to evaluate its applicability to irregular and complex geometries such as Nakdong river bay. In has hoen shown that the automatic mesh generator developed is capable of automatically generating meshes for irreguiar and complex geometries with high qualities of meshes and with the simple input data of arbitrarily specified nodal spacing in bound- aries.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 1996년도 춘계학술대회
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• pp.15-15
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• 1996

A shop floor control system (SFCS) is the central part of a CIM system used to control the activities of several pieces of manufacturing equipment (e.g., NC machines, robots, conveyors, AGVs, AS/RS). The SFCS receives orders and related process plans, and then performs selecting a specific process routing, allocating resources, scheduling the workpieces, downloading the processing instructions (e.g., RS-274 instructions for NC machines, VAL II programs for robot), monitoring the progress of activities, detecting and recovering from errors, and preparing reports on the status of the manufacturing system. Simulation has been utilized in discovering control policies used for resolving shop floor be control problems such as resource contentions, part dispatching, deadlock. The simulation model must be designed to respond to real-time data coming from a shop floor. However, to rapidly build a realtime simulation model of SFCS cannot be easily accomplished. This talk is to address an automatic program generator of discrete event simulation model for shop floor control from process plans and resource models. The program generator is capable of constructing complete discrete simulation models for multi-product and multi-stage flexible manufacturing systems.

• 한국정보처리학회논문지
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• 제7권12호
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• pp.3840-3847
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• 2000

미국의 전자산업협회(Electronic Industries Association)에서는 1991년부터 CASE 도구간의 정보교환을 용이하게 하기 위하여 CDIF (CASE Data Interchange Format) 이라는 표준 형식을 제정해 오고 있다. 각 CASE 도구에서 사용된 데이터를 CDIF 형식으로 변환만 해주면 다른 CASE 도구에서 이를 자신에 맞는 형식으로 변환하여 사용할 수 있다. 이때 각 CASE 도구 공급자는 CDIF 형식으로 변환 혹은 CDIF 형식을 자신에 적합한 형식으로 변환하는 프로그램을 작성하여야 한다. 본 논문에서는 이러한 불편을 해소하기 위해서 CASE 도구 공급자가 각 CASE 도구에서 사용된 자료의 저장형식을 지정하여 주면 CDIF 형식을 지원하는 변환기의 소스코드를 자동으로 생성하는 생성기를 개발하였다. 이 자동 생성기는 CASE 도구에서 사용된 자료의 저장형식, 저장형식에 대한 메타정보, CDIF 메타정보를 입력받아서 CDIF 문장을 생성한다. 본 연구에서 개발한 자동 생성기는 정보저장소에 관계없이 단일화된 인터페이스를 제공하는 JDBC 및 Oracle과 Sun O/S 환경하에서 구현하였다.

• 조명전기설비학회논문지
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• 제29권11호
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• pp.47-52
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• 2015

This paper derives the problems that occur when asynchronous transfer in case of phase, frequency, voltage between the emergency generator and the grid and proposed the countermeasure to solve this problem when the transfer switch replace ATS(Automatic Transfer Switch) with CTTS(Closed Transition Transfer Switch) for the non-interrupting switching. In order to simulate above cases, modelling was used the transient analysis program PSCAD/EMTDC. By using this, the customer installed emergency generator and the grid was implemented. We compared three cases of asynchronous transition based on the basic case and proposed improvement by controlling the governor of emergency generator.

• Journal of information and communication convergence engineering
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• 제8권5호
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• pp.493-497
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• 2010

This paper address the problem of tracking multiple objects encountered in many situation in developing condensation algorithms. The difficulty lies on the fact that the implementation of condensation algorithm is not easy for the general users. We propose an automatic code generation program for condensation algorithm using MATLAB tool. It will help for general user who is not familiar with condensation algorithm to apply easily for real system. The merit of this program is that a general industrial engineer can easily simulate the designed system and confirm the its performance on the fly.

• 대한산업공학회지
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• 제22권2호
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• pp.209-229
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• 1996

Scheduling problems which determine the sequence of jobs are one of the Important issues to many industries. This paper deals with a single-machine job sequencing problem which has complex constraints and an objective function. To solve the problem, an expressive constraint description language and an automatic code generator are developed for our scheduling system. The user just needs to describe the scheduling problem using the constraint description language that allows to express both quantitative and qualitative constraints as well as an objective function in real world semantics. Then, a complete scheduling program based on constraint satisfaction technique is automatically generated through the code generator. Advantage of this approach is that models of the scheduling problems are easily developed and maintained because models ore formulated by using the language which reflects real world semantics.

• 대한전자공학회논문지
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• 제22권6호
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• pp.13-18
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• 1985

고밀도 PLA(Programmable Logic Array) layout의 생성, 간소화 및 검증을 자동화한 일련의 유용프로그램을 개발하였다. 이에는 논리 함수로부터 진리표를 만들어 내는 프로그램. 논리 간소화 프로그램 PLA재배열 프로그랭. stick diagram을 그릴 구 있는 화일을 만들어 내는 프로그램, dynamic CMOS PLA의 layout 생성 프로그램, 그리고 bipartite row folded CMOS PLA layout 생성 프로그램이 포함된다. 크기의 최소화는 주로 논리 간소화 프로그램과 bipartlte row folding 프로그램에 의해수행되며, 최대지연시간은 재배열 프로그램에 의해 작아진다. 자동으로 생성된 layout에 대한 정보는 CIF(Caltach Int-ermidate Form)로 저장된다. 각 프로그램은 C언어로 작성되었으며, VAX-l1/750 (UNIX)에서 수행되었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.463-467
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• 1992

This paper describes the automatic generation of sequence control programs for DCS(Distributed Control System), PLC(Programable Logic Controller) and so on. Since there is no same manufacturing process, it is difficult to standardize sequence programs. We propose the automatic sequence control program generator which is CAD software using knowledge engineering technique.

• 전자공학회논문지A
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• 제29A권3호
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• pp.96-105
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• 1992

The use of fixed-point digital signal processors, such as the TMS 320C25, requires scaling of data at each arithmetic step to prevent overflows while keeping the accuracy. A software which automatizes this process is developed for TMS 320C25. The programmers use a model of a hypothetical floating-point digital signal processor and a floating-point format for data representation. However, the program and data are automatically translated to a fixed-point version by this software. Thus, the execution speed is not sacrificed. A fixed-point variable has a unique binary-point location, which is dependent on the range of the variable. The range is estimated from the floating-point simulation. The number of shifts needed for arithmetic or data transfer step is determined by the binary-points of the variables associated with the operation. A fixed-point code generator is also developed by using the proposed automatic scaling software. This code generator produces floating-point assembly programs from the specifiations of FIR, IIR, and adaptive transversal filters, then floating-point programs are transformed to fixed-point versions by the automatic scaling software.