• 한국시뮬레이션학회논문지
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• 제19권1호
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• pp.63-71
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• 2010

현대전에서는 정보전을 기반으로 미사일, 유도무기 등의 사정거리와 정밀도가 향상됨에 따라 지대공미사일(SAM : Surface to Air Missile)의 요격성능의 중요성이 부각되고 있다. 위협적인 공중 공격을 예측 하고 방어하기 위해 최선의 방법으로 지대공 레이더와 유도미사일을 이용한 공중방어시스템 구축이 필요하다. 지대공미사일 개발 과정에서 Modeling and Simulation (M&S)을 이용하는 것은 시간적, 공간적 제한을 극복할 수 있고 시행착오를 줄임으로 비용을 절감할 수 있는 이점이 있다. M&S는 최신 무기체계 설계 및 교육/훈련 분야에 많이 적용되고 있다. 본 연구는 지대공미사일의 요격 성능 평가를 위한 시뮬레이터를 개발하는 것에 목적이 있다. 본 연구에서는 다양한 사양의 지대공미사일 요격 성능을 고려할 수 있는 지대공미사일 요격 성능 분석 시뮬레이터의 아키텍처를 제시하고 개발하였다. 개발된 지대공미사일 요격 성능 분석 시뮬레이터는 C++와 Direct3D를 기반으로 개발되었으며, Direct3D를 이용한 3D 가시화를 통해 사용자에게 애니메이션 창에 시각적으로 시뮬레이션의 진행 경과를 보여줄 수 있도록 개발되었다. 사용자의 교전모델 설계 운영 정보는 입력창을 통해 입력되며, 이 정보는 객체 관리자, 운영 관리자, 통합 관리자로 구성된 시뮬레이션 엔진에서 자동으로 지대공미사일을 모델링 및 시뮬레이션 하여 빠른 시간 안에 시뮬레이터 사용자에게 피드백을 제공한다.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1998년도 추계학술발표회요약집
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• pp.90-90
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• 1998

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2007년도 춘계학술대회 논문집
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• pp.813-814
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• 2007

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1999년도 추계학술발표회요약집
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• pp.109.1-109
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• 1999

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2000년도 추계학술대회 및 정기총회
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• pp.275-278
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• 2000

This paper focuses on a performance analysis model for optimizing the freight terminal design and layout using AutoMod simulator and numerical analysis. We developed a model to analyze the freiht terminal performance per unit time and the material handling cost based on both throughput and waiting due to conjestion. We developed computer program for this model and some sample results by both numerical method and AutoMod simulator are compared.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.161-162
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• 2008

The steady state performance test for the digital protective relay using general relay test equipment has been main test methods. Because of the development of advanced power system testing equipments, dynamic performance test has been carried out additionally using a digital simulator such as RTDS(Real Time Digital Simulator). For the case of newly adopted digital protective relay with IEC 61850 and network, performance testing items need supplementing. This report displays testing items change according to newly protective relay.

• 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.

• 대한인간공학회지
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• 제31권5호
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• pp.637-646
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• 2012

Objective: The aim of this study was to develop the adaptive device for severe physical disabilities using smart device in the driving simulator and its performance evaluation. Development of appropriate driving adaptive device for the people with serious physical limitation could contribute to maintain their community mobility. Background: There is lack of adaptive driving devices for the people with disabilities in Korea. However, if smart device systems like iPod and iPhone are used for driving a car, the people with serious physical limitations can improve their community mobility. Method: Both gyroscope and accelerometer from iPod were used to measure the tilted angle of the smart device for driving. Customized Labview program was also used to control three axis motors for steering wheel, accelerator and brake pedals. Thirteen subjects were involved in the experiment for performance evaluation of smart device in simulator. Five subjects had driver licenses. Another four subjects did not have driver licenses. Others were people with disabilities. Results: Average driving score of the normal group with driver license in the simulator increased 46.6% compared with the normal group without driver license and increased 30.4% compared with the disabled group(p<0.01). There was no significant difference in the average driving score between normal group without driver license and disabled group(p>0.05). Conclusion: The normal group with driver license showed significantly higher driving score than other groups. The normal group without driver license and disabled group could improve their driving skills with training in simulator. Application: If follow-up studies would be continued and applied in adapted vehicle for on road environment, many people with more severe disabilities could drive and improve the quality of life.

• International Journal of Control, Automation, and Systems
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• 제5권6호
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• pp.643-651
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• 2007

The various blood pressure simulators have been proposed to evaluate and improve the performance of the automatic sphygmomanometer. These have some problems such as the deviation of the actual blood pressure waveform, limitation in the blood pressure condition of the simulator, or difficulty in displaying the blood flow. An improved simulator using disturbance observer is proposed to supplement the current problems of the blood pressure simulator. The proposed simulator has an artificial arm model capable of feeding appropriate fluids that can generate the blood pressure waveform to evaluate the automatic sphygmomanometer. A controller was designed and thereafter, simulation was performed to control the output signal with respect to the reference input in the fluid dynamic model using the proposed proportional control valve. To minimize the external fluctuation of pressure applied to the artificial arm, a disturbance observer was designed on the plant. A hybrid controller combined with a proportional controller and feed-forward controller was fabricated after applying a disturbance observer to the control plant. Comparison of the simulations between the conventional proportional controller and the proposed hybrid controller indicated that even though the former showed good control performance without disturbance, it was affected by the disturbance signal induced by the cuff. The latter exhibited an excellent performance under both situations.

• Journal of Positioning, Navigation, and Timing
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• 제5권4호
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• pp.165-172
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• 2016

A Global Navigation Satellite System (GNSS), which is typically exemplified by the Global Positioning System (GPS), employs a open signal structure so it is vulnerable to spoofing electronic attack using a similar malicious signal with that used in the GPS. It is necessary to require a spoofing test evaluation environment to check the risk of spoofing attack and evaluate the performance of a newly developed anti-spoofing technique against spoofing attacks. The present paper proposed a simulation method of spoofing environment based on simulator that can be implementable in a test room and analyzed the spoofing simulation performance using commercial GPS receivers. The implemented spoofing simulation system ran synchronized two GPS simulator modules in a single scenario to generate both of spoofing and GPS signals simultaneously. Because the signals are generated in radio frequency, a commercial GPS receiver can be tested using this system. Experimental test shows the availability of this system, and anti-spoofing performance of a commercial GPS receiver has been analyzed.