• Title/Summary/Keyword: generic simulator

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Development of Distributed Generic Simulator (GenSim) through Invention of Simulated Network (simNetwork)

  • Koo, Cheol-Hea;Lee, Hoon-Hee;Cheon, Yee-Jin
    • Journal of Astronomy and Space Sciences
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    • v.28 no.3
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    • pp.241-252
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    • 2011
  • A simulated network protocol provides the capability of distributed simulation to a generic simulator. Through this, full coverage of management of data and service handling among separated simulators is achieved. The distributed simulation environment is much more conducive to handling simulation load balancing and hazard treatment than a standalone computer. According to the simulated network protocol, one simulator takes on the role of server and the other simulators take on the role of client, and client is controlled by server. The purpose of the simulated network protocol is to seamlessly connect multiple simulator instances into a single simulation environment. This paper presents the development of a simulated network (simNetwork) that provides the capability of distributed simulation to a generic simulator (GenSim), which is a software simulator of satellites that has been developed by the Korea Aerospace Research Institute since 2010, to use as a flight software validation bench for future satellite development.

Internet-based Generic Simulation Model for Outpatient Clinics (외래환자 진료 프로세스를 위한 인터넷 기반 Generic 시뮬레이션 모델)

  • Koo, Jeongin;Lee, Giho;Lee, Jongsung;Li, Hong;Kim, Byung-In
    • Journal of the Korean Operations Research and Management Science Society
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    • v.37 no.4
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    • pp.139-151
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    • 2012
  • This paper introduces an Internet-based generic simulator for outpatient clinics, named PIOS (Postech Internet-based Outpatient Simulator). Unlike other simulation tools, PIOS is operated on the Internet, is straightforward to use for outpatient process analysis, and is open to public via http://logistics.postech.ac.kr/pios with free of charge. Therefore, non-simulation expert users such as hospital administrators and managers can easily access to PIOS and conduct simulation study by themselves. In this paper, we describe the main components and programming logic of PIOS, and demonstrate its validity by comparing the output results of PIOS and a commercial software package.

A Study on the Development of MMS Server Simulator with IEC61850 (IEC61850을 이용한 MMS Server Simulator 개발)

  • Kim, M.H.;Choi, Y.J.;Lee, J.C.
    • Proceedings of the KIEE Conference
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    • 2008.11a
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    • pp.339-341
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    • 2008
  • 본 논문은 변전소자동화(Substation Automation : SA)의 국제표준화 동향에 맞추어, IEC61850이라는 국제표준 Protocol을 탑재한 여러 Device의 통신 환경을 구축하기 위해서 개발된 MMS Server Simulator 개발에 관한 소개이다. 본 연구를 통해 개발된 MMS Server Simulator는 MMS(Manufacturing Message Specification) Server의 기능과 함께 Report Control Block, GOOSE (Generic Object Oriented Substation Event) Publisher 등의 기능을 가지고 있다.

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Modeling and simulation of foxboro control system for YGN#3,4 power plant (영광 3,4호기 Foxboro 제어시스템 모델링 및 시뮬레이션)

  • 김동욱;이용관;유한성
    • 제어로봇시스템학회:학술대회논문집
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    • 1997.10a
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    • pp.179-182
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    • 1997
  • In a training simulator for power plant, operator's action in the MCR(Main Control Room) are given to plant process and computer system model as an inputs, and the same response as in real power plant is provided in real time. Inter-process communication and synchronization are especially important among various inputs. In the plant simulator, to simulate the digital control system such as FOXBORO SPEC-200 Micro control system, modification and adaptation of control card(CCC) and its continuous display station(CDS) is necessary. This paper describes the modeling and simulation of FOXBORO SPEC-200 Micro control system applied to Younggwang nuclear power plant unit #3 & 4, and its integration process to the full-scope replica type training simulator. In a simulator, display station like CDS of FOXBORO SPEC-200 Micro control system is classified as ITI(Intelligent Type Instrument), which has a micro processor inside to process information and the corresponding alphanumeric display, and the stimulation of ITI limits the important functions in a training simulator such as backtrack, replay, freeze and IC reset. Therefore, to achieve the better performance of the simulator, modification of CDS and special firmware is developed to simulate the FOXBORO SPEC-200 Micro control system. Each control function inside control card is modeled and simulated in generic approach to accept the plant data and control parameter conveniently, and debugging algorithms are applied for massive coding developed in short period.

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Flight Dynamics Mathematical Modeling of Quad Tilt Rotor UAM for Real-Time Simulation (쿼드 틸트 로터 UAM 실시간 비행 시뮬레이션을 위한 비행역학 수학적 모델링)

  • Hyunseo Kang;Nahyeon Roh;Do-young Kim;Min-jun Park
    • Journal of Aerospace System Engineering
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    • v.18 no.4
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    • pp.18-26
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    • 2024
  • This paper describes the results of a study on Generic Quad Tilt Rotor UAM aircraft, focusing on nonlinear mathematical modeling and the development of real-time simulation software. In this research, we designed a configuration for a Generic Quad Tilt Rotor eVTOL UAM aircraft based on NASA's UAM mission requirements. We modeled the aerodynamics using a database, the prop-rotor dynamics with a thrust database, and included a ground reaction and atmospheric model in the flight model. We defined the control concept for various modes(helicopter mode, transition mode, and airplane mode), derived tilt angle corridors, and formulated flight control requirements. The resultant real-time flight simulation software not only performs trim analysis for Tilt Rotor UAM aircraft but also predicts handling qualities, optimizes tilt angle scheduling based on dynamic characteristics, designs and validates flight control laws for helicopter, transition, and airplane modes, and facilitates flight training through simulator integration.

Development of a Truss Structure Analysis Model based on Cellular Automata and Object-oriented Simulation Environment (셀룰러 오토마타와 객체기반 시뮬레이션 환경에 의한 트러스 구조의 해석모델 개발)

  • Kim, Taegon;Lee, JeongJae;Suh, Kyo
    • Journal of The Korean Society of Agricultural Engineers
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    • v.56 no.3
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    • pp.1-9
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    • 2014
  • The aim of this study is to develop a simulation model for analyzing 2D truss structure using Generic Agricultural System Simulator (GASS). Although the truss is simple structure, numerical methods based on matrix analysis are cumbersome and complicated. This study suggests simple and convenient methods to remove calculating steps for whole stiffness matrices. The simulation environment based on independency of object-oriented components on GASS consists of component development and component deploy stages. A component for a truss structure is implemented based on equilibrium equations at nodes. The simulator can analyze truss structures through deploying components with attributes and links. The examples using GASS show intuitive graphical results of the movements of truss nodes.

Development of GASS2 through Improving Inter-component Connection and Communication Modules (연결성과 소통구조 모듈을 통한 차세대 범용 농업시스템 시뮬레이터 (GASS2)의 개발)

  • Kim, Tae Gon;Lee, Sung Yong;Yi, Ho Jae;Lee, Jeong Jae;Suh, Kyo
    • Journal of The Korean Society of Agricultural Engineers
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    • v.56 no.5
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    • pp.29-36
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    • 2014
  • The purpose of this study is to improve the Generic Agricultural Systems Simulator (GASS) which can simulate various rural systems based on object-oriented model. GASS provides the configuration platform of various system components to simplify integrated agricultural system models such as irrigation systems for rice farming. The new connection and communication modules of GASS improve applicability for modelling diverse systems. The geometric connection of GASS replaces topological connection, and communication protocols expand to analyze not only homogeneous system but also heterogeneous system. In this paper, we applied GASS2 to simulate the water heights of linked tanks and the simulation outputs were verified through comparing with analytical solutions of differential equations. The two new modules make it possible to analyze the 4-tank problem which includes topological and heterogenous issues with GASS2.

VLBI NETWORK SIMULATOR: AN INTEGRATED SIMULATION TOOL FOR RADIO ASTRONOMERS

  • Zhao, Zhen;An, Tao;Lao, Baoqiang
    • Journal of The Korean Astronomical Society
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    • v.52 no.5
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    • pp.207-216
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    • 2019
  • In this paper we introduce a software package, the Very long baseline interferometry Network SIMulator (VNSIM), which provides an integrated platform assisting radio astronomers to design Very Long Baseline Interferometry (VLBI) experiments and evaluate the network performance, with a user-friendly interface. Though VNSIM is primarily motivated by the East Asia VLBI Network, it can also be used for other VLBI networks and generic interferometers. The software package not only integrates the functionality of plotting (u, v) coverage, scheduling the observation, and displaying the dirty and CLEAN images, but also adds new features including sensitivity calculations for a given VLBI network. VNSIM provides flexible interactions on both command line and graphical user interface and offers friendly support for log reports and database management. Multi-processing acceleration is also supported, enabling users to handle large survey data. To facilitate future developments and updates, all simulation functions are encapsulated in separate Python modules, allowing independent invoking and testing. In order to verify the performance of VNSIM, we performed simulations and compared the results with other simulation tools, showing good agreement.

A Development of Real-time Monitoring Techniques for Synchronous Electric Generator Systems (동기 발전기 시스템의 실시간 모니터링 기술 개발)

  • Cho, Hyun Cheol
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.66 no.4
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    • pp.182-187
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    • 2017
  • Synchronous generators have been significantly applied in large-scale power plants and its monitoring systems are additionally established to sequentially observe states and outputs. We develop a computer based monitoring device for three-phase synchronous power generators in this paper. First, a test-bed of such generator system is created and then a interface board is constructed to transfer electric signals including the output voltage and the current from generators into a computer system via a data acquisition device. Its RMS(root-mean-square) values are continuously shown on a screen of computer systems and its time-histories graphs are additionally illustrated under a graphic user interface(GUI) mode. Lastly, we carry out real-time experiments using the generator system with the monitoring device to demonstrate its reliability and superiority by comparing results of a generic power analyzer which is well-used in measuring various power systems practically.