• 제목/요약/키워드: Simulator data

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이중편파레이더 시뮬레이터 개발을 위한 2차원 영상우적계 관측자료의 활용가능성 연구 (Study on the Application of 2D Video Disdrometer to Develope the Polarimetric Radar Data Simulator)

  • 김해림;박혜숙;박향숙;박종서
    • 대기
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    • 제24권2호
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    • pp.173-188
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    • 2014
  • The KMA has cooperated with the Oklahoma University in USA to develop a Polarimetric Radar Data (PRD) simulator to improve the microphysical processes in Korea Local Analysis and Prediction System (KLAPS), which is critical for the utilization of PRD into Numerical Weather Prediction (NWP) field. The simulator is like a tool to convert NWP data into PRD, so it enables us to compare NWP data with PRD directly. The simulator can simulate polarimetric radar variables such as reflectivity (Z), differential reflectivity ($Z_{DR}$), specific differential phase ($K_{DP}$), and cross-correlation coefficient (${\rho}_{hv}$) with input of the Drop Size Distribution (DSD) and scattering calculation of the hydrometeors. However, the simulator is being developed based on the foreign observation data, therefore the PRD simulator development reflecting rainfall characteristics of Korea is needed. This study analyzed a potential application of the 2-Dimension Video Disdrometer (2DVD) data by calculating the raindrop axis ratio according to the rain-types to reflect Korea's rainfall characteristics into scattering module in the simulator. The 2DVD instrument measures the precipitation DSD including the fall velocity and the shape of individual raindrops. We calculated raindrop axis ratio for stratiform, convective and mixed rainfall cases after checking the accuracy of 2DVD data, which usually represent the scattering characteristics of precipitation. The raindrop axis ratio obtained from 2DVD data are compared with those from foreign database in the simulator. The calculated the dual-polarimetric radar variables from the simulator using the obtained raindrop axis ratio are also compared with in situ dual-polarimetric observation data at Bislsan (BSL). 2DVD observation data show high accuracies in the range of 0.7~4.8% compared with in situ rain gauge data which represents 2DVD data are sufficient for the use to simulator. There are small differences of axis ratio in the diameter below 1~2 mm and above 4~5 mm, which are more obvious for bigger raindrops especially for a strong convective rainfall case. These differences of raindrop axis ratio between domestic and foreign rainfall data base suggest that the potential use of disdrometer observation can develop of a PRD simulated suitable to the Korea precipitation system.

DSP를 이용한 디지털 보호 계전기의 시뮬레이터에 관한 연구 (A Study on Development of Digital Protective Relay Simulator using Digital Signal Processor)

  • 이종주;정호성;박철원;신명철;안태풍;고인석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 하계학술대회 논문집 A
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    • pp.237-239
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    • 2001
  • This paper describes the digital relay simulator system using digital signal processor. The simulator system has two parts, one is software and the other is hardware part. The simulation software has variety calculation engines ; EMTP simulation data file conversion, user define simulation data generation, sequence data generation, data analysis engines. etc, these are designed upon GUI. And simulator software provides easy control interface for users, the simulator software performs on every MS Windows OS. The simulator hardware design uses 32bit floating point DSP(TMS320C32) architecture to achieve flexibility and high speed operation.

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사용자 통화 특성을 고려한 무선 네트워크 시뮬레이터 구현 (Implementation of Wireless Network simulator considering a User's Call Characteristics)

  • 윤영현
    • 디지털산업정보학회논문지
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    • 제5권3호
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    • pp.107-115
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    • 2009
  • Traditionally, simulation method is used to test and evaluate the performance of communication protocol or functional elements for mobile communication service. In this paper, wireless network simulator is implemented using the C++ object-oriented programming language. This simulator can simulate wireless data services, like as ad-hoc networks, by considering the user's mobility. In this paper, the simulator includes network traffic model to reflect wireless data service and traffic source model to represent a user's mobility similar to real service environment and traffic characteristics can be reflected on the simulation, and also more accurate simulation results can be got through that. In addition, by using object-oriented techniques, new service feature or environment can be easily added or changed so that the developed mobile communication simulator can reflect the real service environment all the time. This simulator can be used in adjusting the characteristics of wireless data hosts following the mobility of the user, and also can be used in building new wireless ad-hoc network routing protocols.

3축 로드 시뮬레이터의 구조 및 동적 해석 (Structural and Dynamic Analysis of Three-Axis Road Simulator)

  • 황성호;김화진;박창수;최경락
    • 한국자동차공학회논문집
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    • 제11권5호
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    • pp.105-111
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    • 2003
  • The three-axis road simulator is the test equipment which can simulate the standardized road conditions for the durability evaluation of automotive components such as suspensions. The road load data are collected and acquired from a vehicle test, and then these data are used to simulate road load conditions by the road simulator which consists of hydraulic actuators, link mechanism and servo controller. The link mechanism must be designed in consideration of the dynamic effect and interference during three axes motions in order to generate accurate motions. In this paper, the structural and kinematic analysis of the link mechanism is performed, and these results can be used for developing the three-axis road simulator. The three-axis road simulator provides considerable savings in cost, development time, and testing risk during developing automotive components.

CIM 기반의 배전자동화 시뮬레이터 (CIM based Distribution Automation Simulator)

  • 박지승;임성일
    • 조명전기설비학회논문지
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    • 제27권3호
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    • pp.87-94
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    • 2013
  • The main purpose of the distribution automation system (DAS) is to achieve efficient operation of primary distribution systems by monitoring and control of the feeder remote terminal unit(FRTU) deployed on the distribution feeders. DAS simulators are introduced to verify the functions of the application software installed in the central control unit(CCU) of the DAS. Because each DAS is developed on the basis of its own specific data model, the power system data cannot be easily transferred from the DAS to the simulator or vice versa. This paper presents a common information model(CIM)-based DAS simulator to achieve interoperability between the simulator and the DASs developed by different vendors. The CIM-based data model conversion between Smart DMS (SDMS) and Total DAS (TDAS) has been performed to establish feasibility of the proposed scheme.

초음속항공기 보조연료탱크 연료량측정시스템 개발용 모사시험장치 개발 (Development of Test Simulator for Developing Fuel Quantity Measurement System for Supersonic Jet Trainer Conformal Fuel Tank)

  • 김봉균;박대진;전현우;이상철
    • 한국항공운항학회지
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    • 제26권2호
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    • pp.76-82
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    • 2018
  • A test simulator is needed to develop a fuel quantity measurement system that takes into account the roll and pitch motion of the aircraft. In this paper, we develop a test simulator that consists of attitude simulation equipment, fueling equipment, and data storage equipment. The attitude simulation equipment simulates the aircraft attitude. It is manufactured to operate pitch angle and roll angle movement. The fueling equipment supplies fuel to the supplementary fuel tank. The data storage equipment collects and stores the measured data. We also develop an automation software that operates the test simulator and collects data automatically. The test simulator has been automated to prevent testers from being exposed to toxic fuel. Through automation software, the collection period is reduced by one quarter compared to manual collection. The developed fuel quantity measurement system is verified through the test simulator.

H/V-버스 병렬컴퓨터의 설계 및 성능 분석 (Design and Performance Analysis of the H/V-bus Parallel Computer)

  • 김종현
    • 한국시뮬레이션학회논문지
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    • 제3권1호
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    • pp.29-42
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    • 1994
  • The architecture of a MIMD-type parallel computer system is specified: a simulator is developed to support design and evaluation of systems based on the architecture: and conducted with the simulator to evaluate system performance. The horizontal/vertical-bus(H/V-bus) system architecture provides an NxN array of processing elements which communicate with each other through a network of N horizontal buses and N vertical buses. The simulator, written in SLAM II and FORTRAN, is designed to provide high-resolution in simulating the IPC mechanism. Parameters provide the user with independent control of system size, PE speed and IPC mechanism speed. Results generated by the simulator include execution times, PE utilizations, queue lengths, and other data. The simulator is used to study system performance when a partial differential equation is solved by parallel Gauss-Seidel method. For comparisons, the benchmark is also executed on a single-bus system simulator that is derived from the H/V-bus system simulator. The benchmark is also solved on a single PE to obtain data for computing speedups. An extensive analysis of results is presented.

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음성과 데이터가 집적된 패킷통신망을 위한 시뮬레이터 개발 (A Simulator for Integrated Voice/Data Packet Communication Networks)

  • 박순;은종관
    • 한국통신학회논문지
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    • 제11권2호
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    • pp.108-121
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    • 1986
  • 音聲과 데이터가 集積된 패킷 通信網의 性能을 豫測하고 시스템 파라메터를 最適化하기 위한 시뮬레이터의 개발에 관하여 記述하였다. 具現된 시뮬레이터는 CCITT의 勸告事項에 따라 運用되는 데이터 터미널이나 host는 물론 패킷 音聲터미널도 연결가능한 音聲 및 데이터集積通信網의 性能을 여러 상황에서 豫測할 수 있다. 시뮬레이션 技法으로는 지금까지 알려진 세가지 discrete event 시뮬레이션 技法 중 process interaction 方法이 사용되었는데 이 方法을 사용하면 실제 시스템과 가장 비슷한 시뮬레이터를 具現할 수 있다. 시뮬레이터는 약 4,000line의 GPSS 시뮬레이션 언어와 PL/I으로 具現되었다. 시뮬레이터의 컴퓨터 run time을 줄이기 위하여 GPSS의 LINK block을 사용함으로써 條件的 event의 數를 줄이는 方法을 사용하였다. 구현된 시뮬레이터를 사용하여 7-node 通信網의 性能을 豫測하였다. 또 개발된 시뮬레이터의 妥當性을 檢證하기 위하여 간단한 音聲과 데이터 multiplexer를 시뮬레이션 모델로 구성한 뒤 그 시뮬레이션 결과를 解釋的 방법에 依한 결과와 比較하였다.

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TETRA 기반 IEC 61850 SCADA 시스템 구축 (Building IEC 61850 SCADA system based on TETRA)

  • 송병권;정태의
    • 전기전자학회논문지
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    • 제13권3호
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    • pp.87-94
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    • 2009
  • TETRA(TErrestrial Trunked RAdio)는 국내 전력IT무선기간망에 적용된 ETSI(European Telecommunications Standards Institute)가 정한 디지털 주파수공용통신(TRS, Trunked Radio System) 기술로서 공중망 및 기간망에 적용되고 있는 무선통신시스템이다. IEC 61850은 SCADA(Supervisory Control And Data Acquisition) 시스템에서 SAS(Substation Automation System)를 위해 제안된 프로토콜이다. 본 논문에서는 리눅스 운영체제 기반의 IEC 61850 Server와 Client Simulator를 사용하였다. 또한 IEC 61850 Server Simulator와 Client Simulator 간의 TCP/IP 기반의 통신을 TETRA Packet Data Service 기반의 통신으로 변환하는 다기능 게이트웨이를 개발하여 TETRA 기반 IEC 61850 SCADA 시스템을 구축하였다.

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A FREQUENCY DOMAIN RAW SIGNAL SIMULATOR FOR SAR

  • Kwak Sunghee;Kim Moon-Gyu;Shin Dongseok;Shin Jae-Min
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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    • pp.530-533
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    • 2005
  • A raw signal simulator for synthetic aperture radar (SAR) is a useful tool for the design and implementation of SAR system. Also, in order to analyze and verify the developed SAR processor, the raw signal simulator is required. Moreover, there is the need for a test system to help designing new SAR sensors and mission of SAR system. The derived parameters of the SAR simulator also help to generate accurate SAR processing algorithms. Although the ultimate purpose of this research is to presents a general purpose SAR simulator, this paper presents a SAR simulator in frequency domain at the first step. The proposed simulator generates the raw signal by changing various simulation parameters such as antenna parameters, modulation parameters, and sampling parameters. It also uses the statistics from an actual SAR image to imitate actual physical scattering. This paper introduces the procedures and parameters of the simulator, and presents the simulation results. Experiments have been conducted by comparing the simulated raw data with original raw SAR image. In addition, the simulated raw data have been verified through commercial SAR processing software.

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