• Title/Summary/Keyword: Virtual plant model

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Survey on the virtual commissioning of manufacturing systems

  • Lee, Chi G.;Park, Sang C.
    • Journal of Computational Design and Engineering
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    • v.1 no.3
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    • pp.213-222
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    • 2014
  • This paper reviews and identifies issues in the application of virtual commissioning technology for automated manufacturing systems. While the real commissioning of a manufacturing system involves a real plant system and a real controller, the virtual commissioning deals with a virtual plant model and a real controller. The expected benefits of virtual commissioning are the reduction of debugging and correction efforts during the subsequent real commissioning stage. However, it requires a virtual plant model and hence still requires significant amount time and efforts. Two main issues are identified, the physical model construction of a virtual device, and the logical model construction of a virtual device. This paper reviews the current literature related to the two issues and proposes future research directions to achieve the full utilization of virtual commissioning technology.

A Method for Generating a Plant Model Based on Log Data for Control Level Simulation (제어시뮬레이션을 위한 생산시스템 로그데이터 기반 플랜트 모델 생성 방법)

  • Ko, Minsuk;Cheon, Sang Uk;Park, Sang Chul
    • Korean Journal of Computational Design and Engineering
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    • v.18 no.1
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    • pp.21-27
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    • 2013
  • Presented in the paper is a log data based modeling method for effective construction of a virtual plant model which can be used for the virtual PLC (Programmable Logic Controller) simulation. For the PLC simulation, the corresponding virtual plant, consisting of virtual devices, is required to interact with the input and output symbols of a PLC. In other words, the behavior of a virtual device should be the same as that of the real device. Conventionally, the DEVS (Discrete Event Systems Specifications) formalism has been used to represent the behavior a virtual device. The modeling using DEVS formalism, however, requires in-depth knowledge in the simulation area, as well as the significant amount of time and efforts. One of the key ideas of the proposed method is to generate a plant model based on the log data obtained from the production system. The proposed method is very intuitive, and it can be used to generate the full behavior model of a virtual device. The proposed approach was applied to an AGV (Automated Guided Vehicle).

A case Study of 3D Model Application for Combining Nuclear Power Industry with Virtual Reality Technology (원전 산업과 가상현실기술 접목을 위한 3D 모델 원전 적용사례 연구)

  • Lim, Byung-Ki
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.05a
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    • pp.224-225
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    • 2019
  • Virtual reality technology can be defined as human-computer interface that makes virtual place of specific environments or situation is an interactive computer-generated experience taking place within a simulated environment. In order to combine virtual reality technology of domestic nuclear power industry, the R&D Project has been developing a virtual/augment reality system for nuclear power plant from April 2018 to March 2021. To effectively apply virtual reality technology of domestic nuclear industry, it is necessary to build virtual space similar to real environment. Therefore, This study is analysed 3d model status for nuclear power plant during the life-cycle, and suggested a method to build 3D cad model close to real environment.

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A Study and Application of Methodology for Applying Simulation to Car Body Assembly Line using Logical Model (Logical 모델을 활용한 자동차 차체 조립 라인의 시뮬레이션 적용을 위한 방안 연구 및 적용)

  • Koo, Lock-Jo;Park, Snag-Chul;Wang, Gi-Nam
    • Korean Journal of Computational Design and Engineering
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    • v.14 no.4
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    • pp.225-233
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    • 2009
  • The objective of this paper is to examine a construction method and verify PLC logic using the logical modeling and simulation of a virtual plant has complex manufacturing system and the domain of application is car body assembly line of automotive industrial operated by PLC Program. The proposed virtual plant model for the analysis of the construction method consists of three types of components which are virtual device, intermediary transfer and controller is modeled by logical model but it the case of the verification of PLC program, HMI and PLC logic in the field substitute for the controller. The implementation of the proposed virtual plant model is conducted PLC Studio which is an object-oriented modeling language based on logical model. As a result, proposed methods enable 3D graphics is designed in the analysis step to use for verification of PLC program without special efforts.

Virtual Manufacturing for an Automotive Company (II) - Constuction and Operation of a Virtual Body Shop (자동차 가상생산 기술 적용 (II) - 차체공장 가상플랜트 구축 및 운영)

  • Noh, Sang-Do;Hong, Sung-Won;Kim, Duk-Young;Sohn, Chang-Young;Hahn, Hyung-Sang
    • IE interfaces
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    • v.14 no.2
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    • pp.127-133
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    • 2001
  • Virtual Manufacturing is a technology facilitating effective development and agile production of products via computer models representing physical and logical schema and the behavior of the real manufacturing systems. For the successful application of this technology, a virtual plant as a well-designed and integrated environment is essential. We propose a series of systematic approaches and effective methods for construction and operation of a virtual plant in this paper, such as a 3-D CAD modeling, cell and line simulations and databases. We developed key technologies for measuring and 3-D CAD modeling of many equipments, facilities and structures of the buildings. In order to study the benefit of virtual manufacturing, we constructed a sophisticated virtual plant model of a Korean automotive company's body shop, and conducted precise simulations of unit cell, lines and the whole plant. We could obtain the benefit of savings in time and cost in many manufacturing preparation activities in the new car development processes.

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Analysis of the Virtual Power Plant Model Based on the Use of Emergency Generators in South Korea

  • Chung, Beom Jin;Kim, Chang Seob;Son, Sung-Yong
    • Journal of Electrical Engineering and Technology
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    • v.11 no.1
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    • pp.38-46
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    • 2016
  • This study analyzes the economic efficiency of the virtual power plant (VPP) model that aims to integrate a number of emergency generators installed at the consumer end and operate them as a single power plant. Several factors such as the demand response benefits from VPP operation and costs incurred for converting emergency generators into VPP are considered to assess the economic efficiency of the proposed VPP model. Scenarios for yearly VPP conversion are prepared based on the installed capacities of the emergency generators distributed in South Korea, while the costs and benefits are calculated from the viewpoints of participants and power companies in accordance with California Test Methods. Furthermore, a sensitivity analysis is conducted on the cost factors among those affecting the economic efficiency of VPP business because these two factors have a great impact on benefits.

Time-Series Estimation based AI Algorithm for Energy Management in a Virtual Power Plant System

  • Yeonwoo LEE
    • Korean Journal of Artificial Intelligence
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    • v.12 no.1
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    • pp.17-24
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    • 2024
  • This paper introduces a novel approach to time-series estimation for energy load forecasting within Virtual Power Plant (VPP) systems, leveraging advanced artificial intelligence (AI) algorithms, namely Long Short-Term Memory (LSTM) and Seasonal Autoregressive Integrated Moving Average (SARIMA). Virtual power plants, which integrate diverse microgrids managed by Energy Management Systems (EMS), require precise forecasting techniques to balance energy supply and demand efficiently. The paper introduces a hybrid-method forecasting model combining a parametric-based statistical technique and an AI algorithm. The LSTM algorithm is particularly employed to discern pattern correlations over fixed intervals, crucial for predicting accurate future energy loads. SARIMA is applied to generate time-series forecasts, accounting for non-stationary and seasonal variations. The forecasting model incorporates a broad spectrum of distributed energy resources, including renewable energy sources and conventional power plants. Data spanning a decade, sourced from the Korea Power Exchange (KPX) Electrical Power Statistical Information System (EPSIS), were utilized to validate the model. The proposed hybrid LSTM-SARIMA model with parameter sets (1, 1, 1, 12) and (2, 1, 1, 12) demonstrated a high fidelity to the actual observed data. Thus, it is concluded that the optimized system notably surpasses traditional forecasting methods, indicating that this model offers a viable solution for EMS to enhance short-term load forecasting.

Force Synchronizing Control for AC Servomotor-Ball Screw Driven Injection Unit (AC서보모터-볼스크루 구동 사출장치의 힘 동기제어)

  • Cho, S.H.
    • Journal of Drive and Control
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    • v.12 no.2
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    • pp.14-20
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    • 2015
  • This paper focuses on the issue of force synchronizing control for the injection servomechanism of injection molding machines. Prior to the controller design, a virtual design model was developed for the injection mechanism with an AC servomotor-ball screw. A synchronizing controller is designed and combined with the PID control to accommodate the mismatches between the real plant and the linear model plant used. Due to the plant uncertainty, the stiffness and the damping of the mechanism were considered. From the tracking control simulations based on the virtual design model, it is shown that a significant reduction in force synchronizing error is achieved through the use of a proposed control scheme.

A Study on Factory Review Using Virtual Reality Model based on P3R Information (P3R 정보 기반의 가상현실 모델을 이용한 공장 품평에 관한 연구)

  • Lee, Ju-Yeon;Choi, Sang-Su;Park, Yang-Ho;Noh, Sang-Do
    • Korean Journal of Computational Design and Engineering
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    • v.15 no.5
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    • pp.343-353
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    • 2010
  • Time to market and cost-efficient production are some of the challenge that manufacturing industries face. Modern methods of engineering can't help such organizations attain competitive advantage. To help these situations, MEMPHIS (Middleware for Exchanging Machinery and Product Data in Highly Immersive Systems) was introduced as an approach that enables VE (Virtual Engineering) and links engineering applications with VR (Virtual Reality) solutions. Thus an environment is provided to implement virtual design reviews and enable the application of virtual prototyping methods. However MEMPHIS could just handle Product data for virtual design review and simulation. In this paper, we newly define and develop the extended MEMPHIS that enables virtual manufacturing with Process, Resource and Plant data as well as Product data.

A basic study 3D model advancement method for nuclear power plant (원자력 발전설비의 3D 모델 상세화 방안에 대한 기초 연구)

  • Lim, Byung-Ki
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.05a
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    • pp.37-38
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    • 2018
  • BIM(Building Information Modeling) in the architecture, VDC(Virtual Design and Construction) defined CIFE(Center for Integrated Facility Engineering) of Stanford university in USA, and Data-driven design definition issued by TECDOC-1284 of IAEA are doing data-level design generated by 3D CAD technology, integrating and managing related information based on the 3D model, and Using 3D models effectively during nuclear power plant life cycle. 3D model of domestic nuclear power industry is using interference review between design fields, 4D system linked 3D construction model and schedule activity, but the 3D model generated in the design phase is effectively not utilized during the construction, operation, decommissioning. therefore, This study is aimed to suggest 3D model LOD(Level of Detail) advancement method through the analysis of existing literature, 2D drawings, and 3D models throughout nuclear power plant lifecycle.

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