• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.1024-1027
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• 2005

This paper describes the performance index of mobile robot and development of testbed which is used to evaluate the index. The developed testbed has rectangular structure similar to a living room of home. It is semi-automation testbed system for evaluation of cleaning performance index. This system is composed with scattering and cleaning equipment of test materials, equipment rifting of objects in inner space and sides itself, vision processing system. To be consistent of performance evaluation of cleaning robot, we make use of camera in this system for the sake of measurement of robot s mobility, path and suction quantity.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1996년도 Proceedings International Workshop on New Video Media Technology
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• pp.101-106
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• 1996

This paper describes the system and network configurations of the Application Development Center for multimedia applications on Korean broadband testbed network. The center is primarily used for developing networked multimedia services funded by the Korean Ministry of Information and Communications. The center is quipped with ATM switch, multimedia workstations and PCs. More than 180 applications for the broadband testbed network are under development. Several examples will be presented in detail.

• 한국산업융합학회 논문집
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• 제20권5호
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• pp.419-424
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• 2017

The purpose of this study is to develop a virtual testbed capable of predicting the functional performance of a linear electromagnetic actuator for a high voltage relay in order to reduce its development costs and time. The virtual testbed is defined by a multiphysics coupling approach in order to consider the complex interactions of multi-domains such as the solenoid model of electromagnets, the mass-spring-damper model of mechanical systems, the electric circuit model for an external control unit, and the thermal model for predicting temperature variations. The performances of the existing high voltage relay were estimated by the virtual testbed, and then the effectiveness and validation of the proposed testbed were discussed in comparison with the experimental test results. This study showed that the virtual testbed can be applied in design, optimization, and investigation of high voltage relays.

• 로봇학회논문지
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• 제8권2호
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• pp.116-128
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• 2013

This paper focuses on development of a testbed for analysis of robot-terrain interaction on rough terrain and also, through one wheel driving experiments using this testbed, prediction of maximum velocity and acceleration of UGV. Firstly, from the review regarding previous researches for terrain modeling, the main variables for measurement are determined. A testbed is developed to measure main variables related to robot-terrain interaction. Experiments are performed on three kinds of rough terrains (grass, gravel, and sand) and traction-slip curves are obtained using the data of the drawbar pull and slip ratio. Traction-slip curves are used to predict driving performance of UGV on rough terrain. Maximum velocity and acceleration of UGVs are predicted by the simple kinematics and dynamics model of two kinds of 4-wheel mobile robots. And also, driving efficiency of UGVs is predicted to reduce energy consumption while traversing rough terrains.

• 한국군사과학기술학회지
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• 제18권3호
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• pp.309-315
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• 2015

This paper presents a lower-limb exoskeleton testbed and its control method. An exoskeleton is a wearable robotic system that can enhance wearer's muscle power or assist human's movements. Among a variety of its applications, especially for military purpose, a wearable robot can be very useful for carrying heavy loads during locomotion by augmenting soldiers' mobility and endurance. The locomotion test on a treadmill was performed up to maximum 4km/h walking speed wearing the lower-limb exoskeleton testbed with a 45kg backpack load.

• 항공우주기술
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• 제12권2호
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• pp.173-179
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• 2013

본 논문에서는 한국형발사체 탑재장비 시뮬레이터의 개발을 위해 설계하고 구축한 테스트베드에 대해 기술한다. 시뮬레이터 테스트베드는 범용성 및 확장성을 위해 CPCI 기반 산업용 하드웨어 시스템을 활용하여 설계하였고, 높은 시스템 안정성 제공 및 실시간 모사 기능 처리를 위해 실시간 운영체제인 QNX를 탑재하였다. 또한 나로호의 탑재장비 중 PDU의 기능을 모사하는 QNX용 실시간 모사 프로그램을 개발하였고, 나로호 상단부 점검장비와의 인터페이스 시험을 통해 시뮬레이터 테스트베드의 기능을 점검하였다. 구축된 시뮬레이터 테스트베드는 향후 실제 한국형발사체 탑재장비 시뮬레이터의 설계 및 개발 단계에서 개발 실현가능성 검증에 활용될 것이다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.375-378
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• 2004

In the telematics industry, the development of an open telematics terminal platform technology will be a great contribution to the telematics industry with an interoperability and adaptability of the telematics services. This paper proposes a terminal platform test process and a prototype of terminal platform testbed systems for an open telematics terminal platform test.

• Journal of Positioning, Navigation, and Timing
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• 제11권4호
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• pp.269-277
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• 2022

In this paper, we overview the system development status of the national maritime precise point positioning-real-time kinematic (PPP-RTK) service in Korea, also known as the Precise POsitioning and INTegrity monitoring (POINT) system. The development of the POINT service began in 2020, and the open service is scheduled to start in 2025. The architecture of the POINT system is composed of three provider-side facilities-a reference station, monitoring station, and central control station-and one user-side receiver platform. Here, we propose the detailed functionality of each component considering unidirectional broadcasting of augmentation data. To meet the centimeter-level user positioning accuracy in maritime coverage, new reference stations were installed. Each reference station operates with a dual receiver and dual antenna to reduce the risk of malfunctioning, which can deteriorate the availability of the POINT service. The initial experimental results of a testbed from corrections generated from the testbed network, including newly installed reference stations, are presented. The results show that the horizontal and vertical accuracies satisfy 2.63 cm and 5.77 cm, respectively. For the purpose of (near) real-time broadcasting of POINT correction data, we designed a correction message format including satellite orbit, satellite clock, satellite signal bias, ionospheric delay, tropospheric delay, and coordinate transformation parameters. The (near) real-time experimental setup utilizing (near) real-time processing of testbed network data and the designed message format are proposed for future testing and verification of the system.

• 한국인터넷방송통신학회논문지
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• 제13권3호
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• pp.111-118
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• 2013

전송을 보장하는 연결 기반의 TCP 프로토콜은 비연결성의 UDP 프로토콜에 비하여 네트워크 오버헤드가 크다. 3GPP는 제한된 대역폭을 분할하여 사용하는 무선 네트워크 및 이동 통신 환경에서, 오버헤드가 적은 UDP 프로토콜을 이용하면서도 데이터의 신뢰성을 보장하기 위한 상위 계층인 RLC 프로토콜을 제안하였다. 따라서 단말 및 기지국을 개발하는 경우 3GPP 표준인 RLC 프로토콜을 구현하여야 하며, 상호 동작을 보장하기 위한 검증 테스트를 통과하여야 한다. 본 논문은 RLC 프로토콜을 시험하기 위한 검증 테스트 베드를 구현하였으며 하위 네트워크에서 발생할 수 있는 다양한 패킷 역전 및 손실을 모사할 수 있는 환경을 구축하였다. 결과적으로 본 논문에서 구축한 테스트 베드를 RLC 프로토콜에 대한 시험 도구로 제안한다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2022년도 춘계학술대회
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• pp.373-374
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• 2022

연근해 어선 등 소형선박에 설치되는 항해통신어로기자재는 대외의존도가 높아 외산제품에 의존하고 있다. 국산화 관점에서 해외 제품수준의 국산화 기술개발이 진행되고 있으며, Track Record 확보 차원에서 전용 테스트베드를 제작하여 실증하고자 한다. 본 논문에서는 테스트베드 설계를 위한 기초연구를 통하여 테스트베드 형태 및 설계방안을 도출하고자 하였다.