• Title, Summary, Keyword: Integrated Design Process

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Integrated Design of Feed Drive Systems Using Discrete 2-D.O.F. Controllers (I) - Modeling and Performance Analysis - (이산형 2자유도 제어기를 이용한 이송계의 통합설계 (I) -모델링 및 성능해석-)

  • Kim, Min-Seok;Chung, Sung-Chong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.28 no.7
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    • pp.1029-1037
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    • 2004
  • High-speed/precision servomechanisms have been widely used in the manufacturing and semiconductor industries. In order to ensure the required high-speed and high-precision specifications in servomechanisms, an integrated design methodology is required, where the interactions between mechanical and electrical subsystems will have to be considered simultaneously. For the first step of the integrated design process, it is necessary to obtain not only strict mathematical models of separate subsystems but also formulation of an integrated design problem. A two-degree-of-freedom controller described in the discrete-time domain is considered as an electrical subsystem in this paper. An accurate identification process of the mechanical subsystem is conducted to verify the obtained mathematical model. Mechanical and electrical constraints render the integrated design problem accurate. Analysis of the system performance according to design and operating parameters is conducted for better understanding of the dynamic behavior and interactions of the servomechanism. Experiments are performed to verify the validity of the integrated design problem in the x-Y positioning system.

Integrated Design of High-speed Feed Drive Systems (고속 이송계의 통합설계)

  • Kim, Min-Soek;Chung, Sung-Chong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.12
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    • pp.2028-2038
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    • 2003
  • High-speed feed drive systems have been widely used in the manufacturing and semiconductor industries. Specifications for high-speed systems require more advanced capabilities than conventional feed drive systems. It is necessary to devise special design concepts to achieve the level of performance for high-speed feed drive systems. In this paper, an integrated design method is proposed for high-speed feed drive systems in which the interactions between mechanical and electrical subsystems ought to be considered simultaneously during the design process. Based on the integrated design method, a nonlinear optimal design procedure of mechanical subsystems considering the Abbe and radius errors is accomplished through the design process of electrical subsystems satisfying the control stability and the saturation condition of actuators as well as the relative stability. Both mechanical and electrical parameters are considered as design variables. Simulations and numerical case studies show that the integrated design method of high-speed feed drive systems creates results satisfying the desired performances of mechatronic systems.

A Study on Preconstruction Process in Support of Lean Project Delivery System - Case Study of Children's Hospital at Bellevue, Wa, U.S.A. - (린 건설 관리 방식의 공사 전 설계 진행에 관한 연구 -미국 벨뷰 어린이 병원 사례 조사-)

  • Kim, Yong-Woo;Kim, Kwang-Ho
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.14 no.4
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    • pp.47-54
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    • 2008
  • Preconstruction process in a lean project delivery system was studied in one large healthcare project working for a general contractor. Researchers joined a new lean delivery project for approximately six weeks and participated in preconstruction process including design coordination, management coordination, and target costing while concurrently interviewing other project participants and employees, recording activity in meetings, and otherwise observing the process. The preconstruction process in lean project delivery system, called integrated project design, showed many benefits such as brining expertise of downstream players (i.e., mechanical and electrical contractors) into the design phase. However, lack of leadership and lack of design-integrator blocked the successful application of a new concept of design process.

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A Development of the Virtual Mockup System(ViMS) for a System Design Review of Aircraft (항공기 체계 설계 검토용 가상목업시스템 개발)

  • Kim, Cheon-Young;Park, Young-Keun;Kim, Sung-Rae;Kim, Mun-Yeol;Reu, Tae-Kyu
    • Journal of the Korea Institute of Military Science and Technology
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    • v.10 no.4
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    • pp.97-104
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    • 2007
  • In this paper, we have proposed an integrated aircraft development environment which can support virtual design and development for Systems Engineering and IPPD(Integrated Product and Process Development). We have also proposed the ViMS(Virtual Mockup System) which can perform a system design review on an integrated aircraft development environment. The ViMS is an integrated virtual design support system with immersive design review functionality to make a virtual mockup instead of a physical mockup through the virtual reality technology. The functionality of the ViMS consists design data management, design technology, design verification, and design assessment. We have described the detailed development artifact, case studies and conclusions of using the ViMS functionality.

Development of Integrated Design and Optimization Software for the High Temperature Furnace Design (초고온 진공로 통합설계 최적화 소프트웨어 개발)

  • Jin, YuXuan;Lee, Jaewoo;Byun, Yunghwan
    • Journal of the Korea Society of Systems Engineering
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    • v.1 no.1
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    • pp.14-19
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    • 2005
  • High temperature vacuum furnaces or high standard electric furnaces demand high technology level and high production cost. Therefore, an iterative design process and the optimization approach under integrated computing environment are required to reduce the development risk. Moreover, it also required to develop an integrated design software that can manage the centralized database system between factory and design department, and the automated furnace design and analysis. The developed software is dedicated to the development of the vacuum (electric) furnaces. Based on the distribute middleware system, the GUI module, the CAD module, the thermal analysis module and the optimization module are integrated. For the DBMS, Microsoft Access is employed, the GUI is developed using Visual Basic language, and AutoCAD is utilized for the configuration design. By investigating the analysis code interface, the analysis and optimization process, and the data communication method, the overall system architecture, the method to integrate the optimizer and ana lysis codes, and the method to manage the data flow are proposed and verified through the optimal furnace design.

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Conceptual Design Based on Scale Laws and Algorithms Sub-critical Transmutation Reactors

  • Lee, Kwang-Gu;Chang, Soon-Heung
    • Proceedings of the Korean Nuclear Society Conference
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    • pp.475-480
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    • 1997
  • In order to conduct the effective integration of computer-aided conceptual design for integrated nuclear power reactor, not only is a smooth information flow required, but also decision making fur both conceptual design and construction process design must be synthesized. In addition to the aboves, the relations between the one step and another step and the methodologies to optimize the decision variables are verified, in this paper especially, that is, scaling laws and scaling criteria. In the respect with the running of the system, the integrated optimization process is proposed in which decisions concerning both conceptual design are simultaneously made. According to the proposed reactor types and power levels, an integrated optimization problems are formulated. This optimization is expressed as a multi-objective optimization problem. The algorithm for solving the problem is also presented. The proposed method is applied to designing a integrated sub-critical reactors.

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PoF based Fatigue Durability Analysis of Automobile Suspension Module (고장물리 기반 자동차 서스펜션 모듈 내구설계)

  • Han, Seung-Ho;Lee, Jai-Kyung;Lee, Tae-Hee;Jang, Kwang-Sub
    • Proceedings of the KSME Conference
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    • pp.1320-1325
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    • 2008
  • In the manufacture of automobile suspension modules at a company as parts supplier, the design process includes the detail design and the design modification via structural and fatigue durability analyses considering PoF(physics of failure) of their weldments that are repeated more than four times sequentially. The approval of the design and the release of final drawings follows. For the suspension modules, e.g. control arms and cross member, the man-hours per worker required in the process outlined above can reach as high as 1,414hours. Application of the developed integrated design system can reduce the man-hours of 1,004. In comparison with the conventional design process, this integrated design system reduces the required time by about 40%. If expense is taken into account, a savings of approximately $192,000 is estimated, assuming the design process accounts for 1.5% of total sales for the parts supplier

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Robust Design of an Injection Molding Process Considering Integrated Desirability (통합 만족도를 고려한 사출성형공정의 강건 설계)

  • Kim, Kyung-Mo;Park, Jong-Cheon
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.18 no.10
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    • pp.34-41
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    • 2019
  • Warpage and weld line are two major cosmetic defects in the injection molding process. These defects are very sensitive to uncontrollable parameters within the process. The optimization of the design variables can be treated with the use of robust designs. Therefore, in order to minimize the warpage and weld line, a special design method to diminish defects is required. In this study, a new robust design method using designer preference to achieve the optimal robust design conditions in the injection molding process is proposed. The effectiveness of the proposed method is shown with an example of the part of warpage and weld line.

Integrated Design System using MDO and Approximation Technique (MDO 통합 설계 시스템을 위한 근사기법의 활용)

  • 양영순;박창규;장범선;유원선
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.275-283
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    • 2004
  • The paper describes the integrated design system using MDO and approximation technique. In MDO related research, final target is an integrated and automated MDO framework systems. However, in order to construct the integrated design system, the prerequisite condition is how much save computational cost because of iterative process in optimization design and lots of data information in CAD/CAE integration. Therefore, this paper presents that an efficient approximation method, Adaptive Approximation, is a competent strategy via MDO framework systems.

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A Design of Integrated Manufacturing System for Compound Semiconductor Fabrication (화합물 반도체 공장의 통합생산시스템 설계에 관한 연구)

  • 이승우;박지훈;이화기
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.26 no.3
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    • pp.67-73
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    • 2003
  • Manufacturing technologies of compound semiconductor are similar to the process of memory device, but management technology of manufacturing process for compound semiconductor is not enough developed. Semiconductor manufacturing environment also has been emerged as mass customization and open foundry service so integrated manufacturing system is needed. In this study we design the integrated manufacturing system for compound semiconductor fabrication t hat has monitoring of process, reduction of lead-time, obedience of due-dates and so on. This study presents integrated manufacturing system having database system that based on web and data acquisition system. And we will implement them in the actual compound semiconductor fabrication.