• Title/Summary/Keyword: postprocessor

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The Postprocessor Technology of for 5-axis Control Machining (5축가공을 위한 포스트프로세서 기술)

  • Jung, Hyoun-Chul;Hwang, Jong-Dae;Kim, Sang-Myung;Jung, Yoon-Gyo
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.10 no.2
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    • pp.9-15
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    • 2011
  • In order to develop a practical postprocessor for 5-axis machining, the general equations of numerically controlled (NC) data for 5-axis configurations with not only non-orthogonal rotary axes but also orthogonal rotary axes were exactly expressed by the inverse kinematics, and a Windows-based postprocessor written in Visual Basic was developed according to the proposed algorithm. The developed postprocessor is a general system that suitable for all kinds of 5-axis machine tool with orthogonal and non-orthogonal rotary axes. Through implementation of the developed postprocessor and verification by a cutting simulation and machining experiment, the effectiveness of the proposed algorithm is confirmed. Compatibility is improved by allowing exchange of data formats such as rotational tool center position (RTCP) controlled NC data, vector post NC data, and program object file (POF) cutter location (CL)data, and convenience is increased by adding the function of work-piece origin offset. Consequently, the technology of practical post-processor for 5-axis machining is developed.

IMPLEMENTATION OF FULL WEB-BASED GRAPHIC USER INTERFACE PROCESSOR FOR CFD SOFTWARE (웹 기반 CFD s/w용 GUI 프로세서의 구현)

  • Juraeva Makhsuda;Ivanov Evgeny G.;Song Dong Joo
    • 한국전산유체공학회:학술대회논문집
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    • 2004.10a
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    • pp.121-125
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    • 2004
  • The preprocessor - solver - postprocessor software for 2D/Axisymmetric CSCM Upwind Flux Difference Splitting Navier-Stokes code has been developed for undergraduate educational purpose. This computational fluid dynamics (CFD) software allows students to setup, solve, visualize and control dynamically server for their own fluid problems via Internet. The preprocessor Is capable of generating geometry and grid, initial solution data and required solver control parameters. The postprocessor shows vector plot and contour plot with different options while residual plot shows root-mean-square (RMS) error history graphically and retrieves the data from solver interactively. Special feature of the preprocessor is grid generation part which is based on MFC/Visual C++ application and FORTRAN single block grid generator process. Many users can access solver via Internet from client computers and solve desired problems using locally installed pre- and postprocessor and remote powerful solver part.

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Development of Real-time Multibody Vehicle Dynamics Software Part II: Preprocessor and Postprocessor Using MATLAB GUI and VR Toolbox (실시간 다물체 차량동역학 소프트웨어 개발 Part II: Matlab GUI와 VR Toolbox를 이용한 전후처리 프로그램)

  • Ha, Kyoung-Nam;Jeong, Wan-Hee;Kim, Sung-Soo;Jung, Do-Hyun;Tak, Tae-Oh
    • Transactions of the Korean Society of Automotive Engineers
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    • v.17 no.1
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    • pp.169-175
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    • 2009
  • Real-time multibody vehicle dynamics software has been developed for virtual handling tests. The software can be utilized for HILS(Hardware In the Loop Simulations) and consists of three modules such as a graphical vehicle modeling preprocessor, a real time dynamics solver, and a virtual reality graphic postprocessor for virtual handling tests. In the graphical vehicle modeling preprocessor, vehicle hard point data for a suspension model are automatically converted into multibody vehicle model. In the real time dynamics solver, the efficient subsystem synthesis method is used to create multibody equations of motion for a subsystem by a subsystem. In the virtual reality graphic postprocessor, an animator has been also developed by using Matlab Virtual Reality Toolbox for virtual handling tests.

Development of Integrated Environment for Optimum Design Using Motif (모티프를 이용한 최적설계 통합환경 개발)

  • Lim, O-Kang;Cho, Heon;Kim,Young-Hyun;Lee, Byung-Woo
    • Computational Structural Engineering
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    • v.9 no.3
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    • pp.97-105
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    • 1996
  • An integrated environment for optimum design has been developed using Motif. The integrated environment is composed of the preprocessor, the postprocessor and the optimization part. The preprocessor is part of making a finite element model for optimum structural design and the postprocessor displays results of optimum design and the optimization part is the part which execute optimization. It is designed to reduce user's difficulties in structural optimum design. It used Graphic User Interface for the concurrent representation of various inputs and outputs through the dialog box, mouse and keyboard. Structural optimum design can be done easily through dialog box, menu, concurrent representation of modeling process and results of structural optimum design can be understood easily through stress contour, deformed model and graph of cost function.

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A Study on Automatic Phoneme Segmentation of Continuous Speech Using Acoustic and Phonetic Information (음향 및 음소 정보를 이용한 연속제의 자동 음소 분할에 대한 연구)

  • 박은영;김상훈;정재호
    • The Journal of the Acoustical Society of Korea
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    • v.19 no.1
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    • pp.4-10
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    • 2000
  • The work presented in this paper is about a postprocessor, which improves the performance of automatic speech segmentation system by correcting the phoneme boundary errors. We propose a postprocessor that reduces the range of errors in the auto labeled results that are ready to be used directly as synthesis unit. Starting from a baseline automatic segmentation system, our proposed postprocessor trains the features of hand labeled results using multi-layer perceptron(MLP) algorithm. Then, the auto labeled result combined with MLP postprocessor determines the new phoneme boundary. The details are as following. First, we select the feature sets of speech, based on the acoustic phonetic knowledge. And then we have adopted the MLP as pattern classifier because of its excellent nonlinear discrimination capability. Moreover, it is easy for MLP to reflect fully the various types of acoustic features appearing at the phoneme boundaries within a short time. At the last procedure, an appropriate feature set analyzed about each phonetic event is applied to our proposed postprocessor to compensate the phoneme boundary error. For phonetically rich sentences data, we have achieved 19.9 % improvement for the frame accuracy, comparing with the performance of plain automatic labeling system. Also, we could reduce the absolute error rate about 28.6%.

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Development of Integrated Software for Optimum Design (C언어를 사용한 최적설계 통합코드)

  • Lim, O-Kang;Cho, Heon;Kim, Sung-Tae;Lee, Byung-Woo
    • Computational Structural Engineering
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    • v.9 no.3
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    • pp.157-167
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    • 1996
  • A graphics system for optimum design(GOD) was developed for the various optimization programs. It is composed of a preprocessor and a postprocessor using the methods of pull-down and pop-up menus. The preprocessor of GOD system helps the designer to make a input file or a subprogram according to a selected optimization program. The postprocessor of the system display the numerical results generated during the iterative numerical analysis processes graphically in the graphic mode. Numerical examples as a mathematical linear problem and a 3-bar truss structure are presented to explain the use of GOD system. The system was programmed in one of the computer programming languages, Borland C.

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Development of Automatic Cutting Tool Selection Program (절삭 공구 자동 선정 프로그램 개발)

  • 김영진
    • Korean Journal of Computational Design and Engineering
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    • v.3 no.3
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    • pp.177-182
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    • 1998
  • The computer related techniques have been developed rapidly in the field of metal removal industry. The electronic catalog for mechanical elements is one of such developments realized in recent years. As the emergence of the electronic catalogs in the 90s, it breaks the restriction of the traditional catalog and becomes a helpful and efficient tool in the field. In this paper, we develop an electronic catalog for the cutting tools of the Korea Tungsten Co. Ltd. The catalog consists of three parts: a preprocessor for tool selection, a database for tool, and a postprocessor for search result. A preprocessor for tool selection is developed under a user-friendly consideration. A database for tool consists of milling, drilling, and reaming tools with a list of cutters, inserts, and components. A postprocessor for search result consists of weight, dimension. drawing, product order number etc. of the tools. It also suggests the optimized cutting condition of the selected tool using a neural network technique which is done by an independent research group.

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Implementation of Postprocessor for CSCM Code by Using Graphic User Interface (그래픽 환경을 이용한 CSCM 수치해석 코드에서의 후처리 과정 개발)

  • Makhsuda Juraeva;Song Dong Joo
    • 한국전산유체공학회:학술대회논문집
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    • 2003.08a
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    • pp.76-81
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    • 2003
  • 전산유체공학에서 그래픽 인터페이스를 이용한 후처리 기법은 수렴된 해의 물리적 구조 및 특성을 이해하는데 있어 매우 중요하다. 따라서 본 연구에서는 그래픽 환경을 이용하여 압축성 유동 해석 코드인 CSCM 수치해석 코드의 후처리 과정을 개발함으로서 코드전체의 완전성을 높이고자 하였다. Visual C++프로그램을 이용하여 Mesh plot, XY plot, 벡터 plot 및 contour plot이 가능한 후처리 프로그램을 개발하였으며 실시간으로 수치해석의 수렴정도를 파악할 수 있는 잔류항에 대한 그래픽 기능을 제공하게 하였다. 개발된 후처리 과정을 2차원 Compression ramp 및 Bump 문제의 해석결과에 대해 본 연구결과와 현재 유체해석의 후처리 프로그램으로 많은 사용자를 확보하고 있는 AMTEC사의 Tecplot 8.0 버전의 결과를 서로 비교해 본 결과 좋은 일치성을 보여주었다.

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Convergence Research for Implementing NC Postprocessor Based Cloud Computing (클라우드컴퓨팅 기반의 NC포스트프로세서 구축을 위한 융합 연구)

  • Ryu, Gab-Sang
    • Journal of the Korea Convergence Society
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    • v.7 no.1
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    • pp.17-23
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    • 2016
  • In this paper, we describe a case of utilizing SaaS technology to build NC Post-processor(WBS) based cloud computing. Developed WPS system was implemented to provide stable and continuous system service by utilizing SCoD methodology. WPS is designed user interface module and control engine module. The interface module is downloaded in a client PC and the control engine is installed in cloud parm area. These modules are connected with computer network. WPS was completed a function test for sheet cutting field and mold manufacturing field, and it is processing a commercial service using with improve the user's convenience and adding a bill charge module.

A Study on Windows-Application in Development of Structural Analysis Softwares (구조해석용 소프트웨어 개발에서의 윈도우즈 응용에 관한 연구)

  • 송준엽;서진국;신영식;우광성
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1995.04a
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    • pp.170-175
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    • 1995
  • In this paper, the problems on Windows application for finite element structural analysis softwares are presented. These Windows application programs provide the better graphical representation of structural geometry through the GUI, and provide the integrated environment for managing various processors such as a preprocessor and a postprocessor. Two examples show the efficiency of this system which can represent various inputs and outputs concurrently on multi-windows by dialog-type.

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