• 한국멀티미디어학회논문지
• /
• 제24권12호
• /
• pp.1632-1640
• /
• 2021

In order to improve target tracking performance of the conventional electro-optical tracking system (EOTS) in the high speed and high maneuvering vehicle, an EOTS navigation algorithm is proposed, in which an inertial measurement unit(IMU) is included and navigation results of the vehicle are used. The proposed algorithm integrates vehicle's navigation results and the IMU and the time-delay and the scale factor errors are augmented into the integrated Kalman filter. In order to evaluate the proposed navigation algorithm, a land vehicle navigation experiments were performed a navigation grade navigation system, TALIN4000 and a tactical grade IMU, LN-200 and a equipment for roll motion were loaded on the land vehicle. The performance evaluation results show that the proposed algorithm effecting works in high maneuvering environment and for the time-delay.

• 한국전자거래학회지
• /
• 제10권1호
• /
• pp.41-60
• /
• 2005

본 논문에서는 국방CALS의 구현을 위한 표준방법론인 ID EF1/1X를 무기체계 연구개발 절차에 적용하여 연구개발 수행과정에서의 연구목표, 정보의 입력, 산출, 제약조건에 대한 정보모델링을 제시하였다. ID EF1/1X를 실행하는 프로그램인 SmartER를 이용하여 연구개발 수행기관 내부에 존재하는 모든 정보자원의 관리에 대한 요구분석을 실시하여 관리해야 할 정보를 식별한 후 TO-BE모델에 대한 정보모델링을 제시한 것이다. ID EF 적용대상인 무기체계 연구개발의 절차는 개념연구, 탐색개발, 체계개발, 그리고 시제품 제작을 거쳐 연구개발 결과 보고서 작성 단계로 구성되어 있다. 본 연구의 정보모델링 결과로 무기체계 통합데이터베이스(IWSDB)를 이용하여 정보를 공유하고 연구개발업무를 수행하는 것을 제시하였다. 무기체계 연구개발사업과 같은 대형 체계개발 사업에 대한 프로세스의 효율성을 기하기 위해서 적절한 방법론으로 알려진 IDEF에 대한 본격적인 연구가 진행되어 국방CALS를 구현하는 계기가 되었으면 한다.

• 시스템엔지니어링학술지
• /
• 제11권1호
• /
• pp.33-39
• /
• 2015

This paper describes a development of aircraft carrier aviation support system architecture using DoDAF. The aircraft carrier, a warship performing a role of mobile sea air base in offensive and defense mission, is super system that is comprised of carrier itself and carrier-based airwing. Performing critical role in step with aviation operations in carrier-airwing interactions, the aviation support system of aircraft carrier is also system of systems. It requires a complex and integrated approach based on systems engineering in establishing concept of this complex systems. In this view, this study establishes an operational scenario and derives operational requirements by identifying aviation operations environment on deck of aircraft carrier. The study presents the operational architecture of the carrier aviation support system by using DoDAF and CASE tool CORE.

• 한국산학기술학회논문지
• /
• 제21권1호
• /
• pp.190-196
• /
• 2020

체계의 신뢰도 향상을 위한 활동으로 고장 보고, 분석 및 고장 수리체계 (FRACAS: Failure Reporting, Analysis and Corrective Action System)가 다양한 산업 분야에서 적용되고 있다. FRACAS는 식별된 고장에 대한 원인 분석과 적절한 시정 조치, 결과 검증을 반복 수행하는 활동으로 신뢰도 향상에 효과적이지만, 기존의 개발 환경에 통합 운용하기에는 프로세스, 데이터 수집 및 관리 등 여러 가지 측면에서 제약사항이 있다. 국내 방산분야에서는 FRACAS 적용의 어려움을 해소하기 위해서 FRACAS 시스템 개발 및 프로세스 개선에 관한 연구가 진행되었지만, 대부분이 운용/유지 단계에 집중되어 있다. FRACAS는 총 수명주기 체계관리(TLCSM: Total Life Cycle System Management) 관점에서 운용되어야 하므로, 개발 초기인 설계 단계부터 FRACAS를 적용할 수 있도록 참조 아키텍처에 대한 연구가 필요하다. 본 논문에서는 국방 무기체계의 전 수명주기에 걸쳐 FRACAS를 효과적으로 적용하기 위해, 체계 수명주기 단계와 FRACAS Closed-Loop 프로세스, FRACAS 필수 요소 등을 고려한 TLCSM 기반의 통합 아키텍처 구축에 대해 연구하였다. 제시된 아키텍처는 함정 전투체계 사업에서 FRACAS 수행 시 참조 모델로 활용하였다.

• 한국전자거래학회지
• /
• 제4권2호
• /
• pp.161-175
• /
• 1999

CALS is a strategy to share integrated product data through a set of standards to achieve efficiencies in business and operational mission areas. In this paper, we studied current status for CALS standard and then analyzed the case of US DoD. The results can be summarized as implementing for two major standard in defense CALS system. They are STEP and XML. Korea Defense can be used to set direction for CALS standard implementation and standard selection process based on this paper's recommendations.

• Journal of Positioning, Navigation, and Timing
• /
• 제11권2호
• /
• pp.71-81
• /
• 2022

In order for electro-optical tracking system (EOTS) to have accurate target coordinate, accurate navigation results are required. If an integrated navigation system is configured using an inertial measurement unit (IMU) of EOTS and the vehicle's navigation results, navigation results with high rate can be obtained. Due to the time-delay of the navigation results of the vehicle in the EOTS and scale factor errors of the EOTS IMU in high-speed and high dynamic operation of the vehicle, it is much more difficult to have accurate navigation results. In this paper, an integrated navigation system of EOTS which compensates time-delay and scale factor error is proposed. The proposed integrated navigation system consists of vehicle's navigation system which provides time-delayed navigation results, an EOTS IMU, an inertial navigation system (INS), an augmented Kalman filter and integration Kalman filter. The augmented Kalman filter outputs navigation results, in which the time-delay of the vehicle's navigation results is compensated. The integration Kalman filter estimates position, velocity, attitude error of the EOTS INS and accelerometer bias, accelerometer scale factor error, gyro bias and gyro scale factor error from the difference between the output of the augmented Kalman filter and the navigation result of the EOTS INS. In order to check performance of the proposed integrated navigation system, simulations for output data of a measurement generator and land vehicle experiments were performed. The performance evaluation results show that the proposed integrated navigation system provides more accurate navigation results.

• Journal of Positioning, Navigation, and Timing
• /
• 제1권1호
• /
• pp.35-43
• /
• 2012

The UGV is one of the special field robot developed for mine detection, surveillance and transportation. To achieve successfully the missions of the UGV, the accurate and reliable navigation data should be provided. This paper presents design and implementation of multi-sensor-based open architecture integrated navigation for localization of UGV. The presented architecture hierarchically classifies the integrated system into four layers and data communications between layers are based on the distributed object oriented middleware. The navigation manager determines the navigation mode with the QoS information of each navigation sensor and the integrated filter performs the navigation mode-based data fusion in the filtering process. Also, all navigation variables including the filter parameters and QoS of navigation data can be modified in GUI and consequently, the user can operate the integrated navigation system more usefully. The conventional GPS/INS integrated system does not guarantee the long-term reliability of localization when GPS solution is not available by signal blockage and intentional jamming in outdoor environment. The presented integration algorithm, however, based on the adaptive federated filter structure with FDI algorithm can integrate effectively the output of multi-sensor such as 3D LADAR, vision, odometer, magnetic compass and zero velocity to enhance the accuracy of localization result in the case that GPS is unavailable. The field test was carried out with the UGV and the test results show that the presented integrated navigation system can provide more robust and accurate localization performance than the conventional GPS/INS integrated system in outdoor environments.

• 한국군사과학기술학회지
• /
• 제19권5호
• /
• pp.645-653
• /
• 2016

The terrestrial wireless backbone network and satellite communications system have been independently developed depending on their own purposes and operational concepts, which results in different characteristics in terms of network architecture and routing protocol operation. In this paper, we propose a method for structurally integrating them in consideration of routing mechanism in an autonomous system. Our approach is that the routers of satellite network operate the OSPF in PTP mode on their interfaces connected to the routers of terrestrial wireless backbone network with grid connectivity, whereas the OSPF in satellite network whose topology is of hub-spoke type runs in NBMA mode. We perform some simulations to verify that the satellite communications system can be integrated and interwork with the terrestrial wireless backbone network by our proposed approach. From simulation results, it is also found that the increases of network convergence time and routing overhead are acceptable.

• 한국항공우주학회지
• /
• 제49권12호
• /
• pp.971-980
• /
• 2021

최근 드론 기술의 대중화와 함께 저비용의 소형 무인기를 다수 또는 군집으로 운용함으로써 상당한 군사적 효용성을 얻을 수 있음이 알려지면서, 군집무인체계의 전장 활용을 위한 연구가 활발히 진행되고 있다. 국방과학연구소에서는 이와 관련한 주요기술로 군집제어, 군집통신, 군집정보, 군집협업 기술을 식별하였으며, 1단계로써 대상 무인체를 운용하는 데 필요한 군집제어와 군집통신 기술에 대한 연구를 수행하였다. 본 논문에서는 소형 고정익 무인기 기반의 군집무인기시스템을 설계 및 제작하고, 군집제어 및 군집통신 기술을 비행시험으로 검증한 과정을 소개한다. 최종비행시험에서 무인기 19대가 군집비행을 수행함으로써 국내 최초로 군사적으로 활용도가 높은 고정익 무인기 약 20대 규모의 군집 비행시험에 성공하였다.

• Journal of Positioning, Navigation, and Timing
• /
• 제4권3호
• /
• pp.123-130
• /
• 2015

In this study, a carrier smoothed global positioning system / dead reckoning (CSGPS/DR) integrated system for high-precision trajectory estimation for the purpose of vehicle navigation was proposed. Existing code-based GPS has a low position accuracy, and carrier-phase differential global positioning system (CPDGPS) has a long waiting time for high-precision positioning and has a problem of high cost due to the establishment of infrastructure. To resolve this, the continuity of a trajectory was guaranteed by integrating CSGPS and DR. The results of the experiment indicated that the trajectory precision of the code-based GPS showed an error performance of more than 30cm, while that of the CSGPS/DR integrated system showed an error performance of less than 10cm. Based on this, it was found that the trajectory precision of the proposed CSGPS/DR integrated system is superior to that of the code-based GPS.