• 한국항행학회논문지
• /
• 제16권3호
• /
• pp.449-454
• /
• 2012

최근 유비쿼터스 컴퓨팅 기술의 발전함에 따라 센서기반 시스템이 IT 업계의 큰 이슈로 떠오르고 있다. 센서기반시스템을 응용한 스마트 기상 측정 시스템은 기상관측의 중요 인자인 온도를 위치와 고도에 구애받지 않고 실시간으로 측정할 수 있다. 스마트 기상 측정 시스템은 GPS의 위치정보를 송신하는 제어부와 PC의 무선 수신부로 구성되었다. 제어부는 측정기구 본체로서 ATmega2560을 프로세서로 사용하여 온도센서와 GPS를 제어하고, 측정된 정보는 RF 모듈을 통해서 수신부에서 송신부인 PC로 보내서 데이터를 처리할 수 있도록 하였다.

• 시스템엔지니어링학술지
• /
• 제2권1호
• /
• pp.18-23
• /
• 2006

The purpose of this study and report is to provide, to the MND, an independent cost analysis of modernizing software of F-16 fighter fleets to support the use of several weapon system options, including JDAM, AIM-9X and HARM Targeting System etc. The study analyzed each options with software sizing, software cost, enabling hardware cost, flight test cost, system engineering cost, and 3 strategies. And the study proposed and analyzed some alternative strategies: strategy1 is to modernize software only within existing electronic processing capability; strategy2 is a full upgrade of weapons avionics with plug compatible electronics; strategy3 is an approach defined to mirror the USAF Common Configuration Implementation Approach (CCIP). The recommended alternative is strategy2.

• Journal of Information Processing Systems
• /
• 제15권6호
• /
• pp.1462-1471
• /
• 2019

Real-time embedded systems have become pervasive in general industry. They also began to be applied in such domains as avionics, automotive, aerospace, healthcare, and industrial Internet. However, the system failure of such domains could result in catastrophic consequences. Runtime software testing is required in such domains that demands very high accuracy. Traditional runtime software testing based on handwork is very inefficient and time consuming. Hence, test automation methodologies in runtime is demanding. In this paper, we introduce a software testing system that translates a real-time software into a monitorable real-time software. The monitorable real-time software means the software provides the monitoring information in runtime. The monitoring target are time constraints of the input real-time software. We anticipate that our system lessens the burden of runtime software testing.

• International Journal of Aerospace System Engineering
• /
• 제2권2호
• /
• pp.87-91
• /
• 2015

KT-1P for the Peru Air Force will be used as a utility aircraft with upgraded avionics equipment and arming capability based on KT-1 and KA-1. KT-1P should be shown for compatibility of new store loading configurations loaded with dispenser, bomb, and rocket based on aircraft-store compatibility test and evaluation procedures before KT-1P is operated as a light attack aircraft. The weapon system ground test for installation and flight test for envelope expansion including store separation are described in this paper, which was performed referring 'seek eagle program' under MIL-HDBK-1763 and MIL-HDBK-244A.

• 한국군사과학기술학회지
• /
• 제5권2호
• /
• pp.123-131
• /
• 2002

ASC(Avionics System Computer) was developed to control weapon delivery and navigation sensors, and to perform man-machine interface with pilots for XKO-1 aircraft. The data communications between ASC and UFC(Up Front Controller), DC(Data Concentrator) were implemented by RS422 serial data bus. Also, SCIL(Standard Computer Interface Library) was designed to facilitate control and management of the computer hardware resources and is embedded in the ASC. These structures have a merit of noise immunity and a reduction of wire harness for signal lines, and enable OFP(Operational Flight Program) programmers to use the SCIL easily without knowing hardware details. Manufactured system was on installed on XKO-1, and peformed for BIT(Built In Test) and interface test with UFC and DC. The test results show that it meets the system requirements.

• 한국항공우주학회지
• /
• 제40권12호
• /
• pp.1086-1092
• /
• 2012

항공 산업의 발전에 따라 정밀하고 신뢰성 높은 항법 정확도를 제공하기 위하여 DGPS/INS 복합항법 장치에 대한 많은 연구가 수행되고 있다. 이러한 항법 시스템의 항법 정확도는 항공기의 안전성과 신뢰성에 직접적인 영향을 끼치기 때문에 항법 시스템의 비행시험 검증은 매우 중요하다. 특히 DGPS/INS 복합항법 장치와 같은 높은 수준의 위치 정확도를 가지는 항법시스템을 검증하기 위해서는 보다 정확한 비행 항법 성능 평가기법이 필요하다. 항법 성능 검증은 DGPS/INS보다 정밀한 항법 정확도를 가지는 기준 궤적과의 비교 분석을 통해 이루어지며 기준 수신기는 수 cm수준의 CDGPS 후처리 기법이 가능한 GPS 수신기를 사용해야 한다. 일반적으로 DGPS/INS 복합항법 장치의 출력 점은 항공기의 무게중심점으로 GPS 안테나의 위치를 출력하는 GPS 수신기와 다르기 때문에 출력데이터의 가공없이 성능 평가를 진행할 경우 추정 오차에 안테나 위치와 항공기의 무게중심점간 거리 오차가 포함된다. 따라서 보다 정확한 항법 성능 평가를 위하여 기준 궤적 생성을 위한 GPS 수신기의 Lever Arm 보정이 필요하다. 본 논문에서는 DGPS/INS 복합항법장치의 비행항법 성능 검증을 위하여 기준궤적의 Lever Arm 보정을 포함한 비행시험 성능평가 절차 및 비행 시험 결과를 제시한다.

• 한국항공운항학회지
• /
• 제24권4호
• /
• pp.6-11
• /
• 2016

There has been an increase in the number of researches on the segment for commercialization after developing avionics systems. In this paper, we have applied a commercial off-the-shelf(COTS) operating systems in an aircraft mission computer. We used UAV collision avoidance algorithms to compare the performance of COTS operating systems. The UAV collision avoidance algorithms were tested on different operating systems to compare the performances of the operating systems. The measured parameters are memory usage and processing time. We have verified that the UAV collision avoidance algorithms worked successfully and compared the performance of each operating system.

• 전기학회논문지
• /
• 제56권4호
• /
• pp.784-789
• /
• 2007

This paper presents an implementation of a new type of architecture to improve an overflow problem on the network buffer. Each receiver channel of network system stores the message in its own buffer. If some receiver channel receives many messages, buffer overflow problem may occur for the channel. This paper proposes a network controller that implements a receiver channel with shared-memory to save all of the received messages from the every incomming channels. The proposed architecture is applied to ARINC-429, a real-time control network for commercial avionics system. For verifying performance of the architecture, ARINC-429 controller is designed using a SOPC platform, designed by Verilog and targeted to Xilinx Virtex-4 with a built-in PPC405 core.

• 한국항공운항학회지
• /
• 제23권1호
• /
• pp.1-7
• /
• 2015

The aircraft maintenance demands a lot of aviation mechanics in urgent according to the high season and low season in seasonal demand adjusted, unplanned maintenance work such as AD (airworthiness directives) and troubleshooting of aircraft system fault. The advent of Super-Large Aircraft such as A380 with aircraft materials, power plant and avionics systems which were not in previous models must be expected to increase the complexity of the aircraft maintenance system. This study is intended to propose the development plan for formation of positive flexibility culture in aircraft maintenance organization through the review of previous research on flexibility culture of organization and through empirical research for bureaucratic and poor factors by the evaluation of flexibility culture level of domestic aircraft maintenance organization.

• 전기전자학회논문지
• /
• 제22권2호
• /
• pp.446-454
• /
• 2018

In this work, we summarize the calculation processes of obtaining a scattering factor using with the equilibrium average projection scheme (EAPS), with moderately weak coupling (MWC) interaction, and obtain the line-shape formula of an electron-deformation phonon interacting system interested in the confinement of electrons by squarwell confinement potentials in quantum two dimensional system.. Through the numerical analysis, we analysis the magnetic dependence of absorption power, P(B) in several temperature and frequency difference dependence of absorption power $P({\Delta}{\omega})$, in several external field, where ${\Delta}{\omega}={\omega}-{\omega}_0$ and ${\omega}({\omega}_0)$ is the angular frequency (the cyclotron resonance frequency). The result of equilibrium average projection scheme (EAPS) in SER-MWC explains the properties of quantum transition quite well.