• 한국군사과학기술학회지
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• 제23권3호
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• pp.277-285
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• 2020

Survivability in a battle field is the most important aspect to the warriors. To analyze the survival effectiveness of warrior platform, the simulation via war-game model is an essential step in advance to the development of platform. In this study, Army Weapon effectiveness Analysis Model(AWAM) was utilized for analysis. Several weapon parameters were adjusted to apply the characteristics of warrior platform in some cases of the defense and survival system. Especially, adjusted triage possibility, probability of kill, fatality and accuracy were employed as parameters in the simulation program to evaluate the survival effectiveness of intelligent system based on the previous researches. In the future battle field or virtual space in the AWAM, the warrior platform intelligent system could react emergency treatment on time by expoiting the bio-information of man at arms. Considering the order of supply priority, special force was selected as operating troops and battle scenario without engagement was selected to measure accurate survival effectiveness. In conclusion, the survivability of defence and survival system of the warrior platform was about 1.47 times higher than that of current system.

• 제어로봇시스템학회논문지
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• 제20권10호
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• pp.1067-1072
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• 2014

The ability to overcome obstacles is necessary for field robots for various applications including the ability to climb stairs. While much research has been performed focusing on overcoming obstacles, the resulting robots do not have sufficient ability to overcome obstacles such as stairs. In this research, the purpose is to overcome relatively large obstacles by flipping locomotion through the modification of the stair climbing robotic platform of the previous research. We propose two scenarios to overcome large obstacles: a rear wheel driving system and an elevation system using a ball screw. The research is performed based on static analyses on obstacle-climbing. As the simulation results indicate, we determined the optimal posture of the robot for climbing obstacles for rear wheel driving. Also, an elevation system is analyzed for obstacle climbing. Between the two scenarios an elevation system is determined to reduce the operating torque of the actuator, and the prototype was recently assembled. The climbing ability of the robotic platform is verified. We expect the application area for this robotic platform will be in accident areas of nuclear power plants.

• 한국콘텐츠학회논문지
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• 제12권5호
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• pp.40-51
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• 2012

본 논문에서는 효과적인 정보 공유 및 협업을 지원하는 SNS-웹 플랫폼 기반의 영상세미나 시스템을 설계 및 구현한다. 제안하는 영상세미나 시스템은 크게 세 가지 특징을 갖는다. 첫째, 구현된 시스템은 자바 웹 스타트를 기반으로 개발되었기 때문에, 사용자는 특정 하드웨어 및 소프트웨어의 설치 없이 웹 기반의 영상세미나에 참여할 수 있다. 둘째, 구현된 시스템은 다양한 운영체제 및 인터넷 웹 브라우저에서 동작이 가능하다. 셋째, 구현된 시스템은 SNS-웹 플랫폼 기반으로 동작하기 때문에, SNS 상에서 연결되어 있는 전문가들 간의 전문지식 공유 및 협업을 지원 가능하다. 마지막으로, 성능분석을 통해 구현된 시스템이 평균 지연 시간 측면에서 효율적임을 보인다.

• 한국컴퓨터정보학회논문지
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• 제21권10호
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• pp.107-114
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• 2016

In this paper, we propose the building method for the unified IoT service platform between the variety of legacy systems with the heterogeneous structures and the operating environments. To accommodate the structural diversity of legacy systems, we develop a virtual integrated structure and interface abstracting method. By this, the new platform can use the data sources of the legacy systems as if the data source is in the new platform. In a manner without modification of the legacy systems with performing minimum tasks, we proposes a model that can be integrated without affecting the availabilities of the legacy systems.

• Smart Structures and Systems
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• 제11권2호
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• pp.135-161
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• 2013

This work presents a test platform for the assessment and benchmarking of modern actuators which have been specifically developed for the new field and service robotics applications. This versatile platform has been designed for the comparative analysis of actuators of dissimilar technology and operating conditions. It combines a modular design to adapt to linear and rotational actuators of different sizes, shapes and functions, as well as those with different load capacities, power and displacement. This test platform emulates the kinematics of robotic joints while an adaptive antagonist-load actuator allows reproducing the variable dynamic loads that actuators used in real robotics applications will be subjected to. A data acquisition system is used for monitoring and analyzing test actuator performance. The test platform combines hardware and software in the loop to allow actuator performance characterization. The use of the proposed test platform is demonstrated through the characterization and benchmarking of three controllable impedance actuators recently being incorporated into modern robotics.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.812-816
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• 2007

IT 산업이 빠르게 발전하면서 리소스가 제한된 셋탑박스와 스마트폰 같은 중소형 디바이스의 사용이 비약적으로 증가하는 추세이다. 자바는 플랫폼 독립성(Platform Independency), 보안성(Security), 이동성(Mobility) 등의 장점을 가지고 있기 때문에 안정된 서비스를 제공해야 하는 중소형 디바이스들에게 중요한 핵심 소프트웨어 플랫폼이 되어가고 있다. 이러한 디바이스에서 자바애플리케이션을 실행하기 위해서는 자바가상머신(Java Virtual Machine)이 필요하다. C 가상 머신(Classic Virtual Machine : CVM)은 리소스가 제한된 임베디드 디바이스를 위해 고안된 자바가상머신이다. 본 논문에서는 실시간 운영체제 UbiFOS$^{TM}$상에 CDC(Connected Device Configuration) 에서 정의하고 있는 CVM을 설계 및 구현하였다.

• 전기학회논문지
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• 제66권12호
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• pp.1792-1798
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• 2017

Event Data Recorder(Car Black-Box) with WiFi dongle have been released, and the platform of the majority is the Linux platform. This is because the platform development is possible in little investment cost by reducing the source licensing costs by taking advantage of the open source. But utilizing Linux platform has the limitations of boot-up time and consuming processing power due to the limitation of battery capacity, to be cost-competitive to minimize the use of memory. In this paper, the real-time operating system(RTOS) is utilized to optimize these portions. MP4 encoder and Muxer are developed to be about ten seconds boot up and minimized memory. It has the advantages of operating at lower power consumption than the Linux utilizing WiFi dongle. Utilizing a WiFi dongle is to provide a progressive download feature on smart phones to lower product prices. But RTOS has the weakness in WiFi. Porting TCP /IP, Web and DHCP server and combination with the USB OTG Host interface by implementing the protocol stack are developed for WiFi. And also SPI NOR flash memory is utilized for faster boot time and cost reductions, low processing power to be consume. As the results, the developed proved the 10 seconds booting time, 24 frame rate/sec. and 10% lower power consumption.

• 한국산학기술학회논문지
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• 제9권5호
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• pp.1139-1144
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• 2008

본 논문에서는 가상 플랫폼을 이용하여 빠르고 효과적으로 시스템을 검증하기 위한 추상레벨의 자동생성에 대하여 제안한다. 추상레벨 가상 플랫폼은 효과적인 검증 방법이긴 하지만 시스템이 변경될 때마다 가상 플랫폼을 재생성하고 추가적인 설계/검증을 요구되며 이 작업은 매우 많은 시간을 요구한다. 이러한 문제점을 해결하기 위하여 본 논문에서는 CPU, 메모리, UART 등을 기본적인 요소로 구성하여 추상레벨의 라이브러리로 생성하였다. 이 라이브러리를 이용하여 가상 플랫폼을 자동 생성하는 툴을 개발하였다. 이 툴은 임베디드 RTOS를 구성하는 가상 플랫폼을 자동 생성하며 HW/SW 간의 통신을 위한 메모리 맵과 디바이스 드라이버 등도 생성한다. 제안한 방법은 JPEG과 H.264에 성공적으로 적용하였으며 기존의 수동 작업에 비하여 매우 빠르게 가상 플랫폼을 자동 생성할 수 있었다.

• KEPCO Journal on Electric Power and Energy
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• 제2권2호
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• pp.233-244
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• 2016

Smart grid is called it as a system of systems. There are diverse types of systems in smart grid environment. Therefore, one of key factors to achieve smart grid successfully is interoperability among diverse systems. To secure interoperability, smart grid operating system should be developed complied with standards in terms of the data representation and communication. Common Information Model (CIM) and OLE Process for Control - Unified Architecture (OPC-UA) are the representative international standards in smart grid domain. Each standard defines data representation and communication by providing common information model and the unified architecture. In this paper, we explain a smart grid platform that we have developed to comply with CIM and OPC-UA standards for secure interoperability among numerous legacy systems.

• 전자공학회논문지CI
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• 제48권5호
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• pp.24-32
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• 2011

국방 분야와 정보기술의 융합 가속화에 따라 군 원격교육체계에서도 혁신적 변화가 요구되고 있다. 즉, 네트워크중심 지식정보화로 발전하기 위해 표준, 상호운용성 등을 바탕으로 통합의 필요성이 증가하고 있다. 이에 본 연구에서는, SOA 기반에서 동영상콘텐츠 서비스에 대한 운영모델과 운영시스템을 도출하여 군 원격교육체계에 대한 통합 혁신 발전 방향을 제시하고자 한다. SOA가 지닌 서비스 중심으로 프로세스 단위의 통합과 확장이 용이한 점을 이용하여, 동영상 서비스 플랫폼 구조를 정의하고, Imprimatur 모델을 바탕으로 서비스 체계를 도출한다. 이를 바탕으로, 운영모델에서는 동영상콘텐츠 서비스를 위해 생산모델, 중개모델, 소비모델에 따른 각 단계별 액터들의 역할을 정의하고, 운영시스템에서는, 운영모델을 바탕으로 동영상콘텐츠 서비스를 위해 필요한 기능을 제어하고 처리할 수 있도록 기능과 데이터를 정의한다.