• Title, Summary, Keyword: flight software

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A Study on Qualification Procedures of Flight Control Software on Military Aircraft (군용항공기 비행제어 소프트웨어 품질인증 절차에 관한 연구)

  • Heo, Jin-Goo
    • Journal of the Korean Society for Quality Management
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    • v.41 no.3
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    • pp.433-441
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    • 2013
  • Purpose: This study investigates software qualification procedures based on the FA-50 flight control software to satisfy high reliability and flight safety. Methods: We studied software qualification categories, standard/specification and developed country case. We proposed procedure to satisfy not only flight safety but also international standard. Results: The proposed software qualification procedure satisfied flight safety and airworthiness based on the testing result of the FA-50 flight control software. Conclusion: This paper showed an appropriate qualification procedures of the flight control software in domestic circumstance through the FA-50 flight control software qualification.

Flight Software Modeling in Satellite Simulator

  • Lee, Sanguk;Sungki Cho;Kim, Jae-Hoon;Lee, Seong-Pal
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.147-151
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    • 2001
  • Based on flight software modeling experiences on satellite simulator developments so far, three different approaches for modeling the flight software within the satellite simulator such as utilization of a processor emulator executing the actual flight software image, re-compilation of the flight software sources within the simulator infrastructure, and development of a set of abstract models representing the required flight software functionality are presented.

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A Study on developing Flight Software for Nano-satellite based on NASA CFS (NASA CFS에 기반한 초소형 위성용 비행소프트웨어 개발에 관한 연구)

  • Choi, Won-sub;Kim, Jin-Hyoung;Kim, Hae-dong
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.44 no.11
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    • pp.997-1005
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    • 2016
  • Flight software plays an important role in operating satellites, such as processing commands from ground station, controlling satellites and processing mission data. Reliability is the most important thing in flight software and many verifications and tests are needed for assuring it. this causes an increase of cost and period of development. So NASA has developed a reusable flight software platform to apply to their satellite projects. The CFS(Core Flight System) is the very result. We are developing our flight software for a nano-satellite based on NASA CFS. We have tested core services and functions provided in CFS and we have designed and implemented flight software based on these.

FLIGHT SOFTWARE DEVELOPMENT FOR HAUSAT-2 ON-BOARD COMPUTER (HAUSAT-2 비행소프트웨어 개발)

  • Shim Chang-Hwan;Ryu Jung-Hwan;Choi Young-Hoon;Chang Young-Keun
    • Bulletin of the Korean Space Science Society
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    • pp.117-120
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    • 2006
  • HAUSAT-2 flight software was developed by first analyzing the satellite requirements, and incorporating the results into the software. Coding and compiling is done after the software is completed, then individual and integrated tests are performed in order to verify the flight software algorithm. Currently, HAUSAT-2 flight software integrated test has been performed and the test result is serving as a basis for code modification nd additional developments. This paper describes the architecture, development process, and development environment of HAUSAT-2 flight software.

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Design and Implementation of Integrated Verification Facility for Satellite Flight Software (위성비행소프트웨어 통합검증환경의 설계 및 구축)

  • Shin, Hyun-Kyu;Lee, Jae-Seung;Choi, Jong-Wook;Cheon, Yee-Jin
    • Aerospace Engineering and Technology
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    • v.11 no.1
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    • pp.49-56
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    • 2012
  • The flight software monitors the status of the satellite and performs attitude control and its own mission. Due to the operating environments and its uniqueness, the high level of reliability is required for the flight software. To this end, a variety of activities to meet the given requirements and improve the safety and reliability are made during the development of flight software. A variety of development environments should be provided to support execution of flight software on hardware or satellite simulator and dynamic verification of flight software through command/telemetry interface. The satellite flight software team has been developing the IVF to be applied to various satellite projects more effectively and to improve the reliability of flight software. In this paper, the design and configuration method of IVF for the effective verification of flight software is introduced.

Development of Verification Environment for Flight Safety Critical Software using NEXUS (NEXUS를 이용한 비행안전 필수 소프트웨어 검증환경 개발)

  • Yoon, Hyung-Sik;Han, Jong-Pyo
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.40 no.6
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    • pp.548-554
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    • 2012
  • Verification and validation of operational software of the flight control computer, which is flight safety critical, is very important to prove correctness and faultness of the software. To verify the real-time softare requirement on operational software of flight control computer, real-time software internal parameter and variable monitoring technics on hardware-in-the-loop environment, similar to on-flight environment, is required. This paper describes flight safety critical software validation and verificiation environment using standard debugging interface, NEXUS 5001.

A Study on the Design of Software Switching Mechanism for Develops the Flight Control Law (제어법칙 개발을 위한 소프트웨어 전환장치 설계에 관한 연구)

  • Kim, Chong-Sup;Cho, In-Je;Ahn, Jong-Min;Shin, Ji-Hwan;Park, Sang-Seon
    • Journal of Institute of Control, Robotics and Systems
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    • v.12 no.11
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    • pp.1130-1137
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    • 2006
  • Relaxed Static Stability(RSS) concept has been applied to improve aerodynamic performance of modern version supersonic jet fighter aircraft. Therefore, the flight control systems are necessary to stabilizes the unstable aircraft and provides adequate handling qualities. The initial production flight control system are verified by flight test and it's always an elements of danger because of flight-critical nature of control law function and design error due to model base design method. These critical issues impact to flight safety, and it could be lead to a loss of aircraft and pilot's life. Therefore, development of an easily modifiable RFCS(Research Flight Control System) capable of reverting to a PFCS(Primary Flight Control System) of reliable control law must be developed to guarantee the flight safety. This paper addresses the concept of SSWM(Software Switching Mechanism) using the fader logic such as TFS(Transient Free Switch) based on T-50 flight control law. The result of the analysis based on non-real time simulation in-house software using SSWM reveals that the flight control system are switching between two computers without any problem.

Development of the Command and Data Handling System and Flight Software of BITSE

  • Park, Jongyeob;Baek, Ji-Hye;Jang, Bi-ho;Choi, Seonghwan;Kim, Jihun;Yang, Heesu;Kim, Jinhyun;Kim, Yeon-Han;Cho, Kyung-Suk;Swinski, Joseph-Paul A.;Nguyen, Hanson;Newmark, Jeffrey S.;Gopalswamy, Natchumuthuk
    • The Bulletin of The Korean Astronomical Society
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    • v.44 no.2
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    • pp.57.4-57.4
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    • 2019
  • BITSE is a project of balloon-borne experiments for a next-generation solar coronagraph developed by a collaboration with KASI and NASA. The coronagraph is built to observe the linearly polarized brightness of solar corona with a polarization camera, a filter wheel, and an aperture door. For the observation, the coronagraph is supported by the power distribution unit (PDU), a pointing system WASP (Wallops Arc-Second Pointer), telemetry & telecommand system SIP (Support Instrument Package) which are developed at NASA's Goddard Space Flight Center, Wallops Flight Facility, and Columbia Scientific Balloon Facility. The BITSE Command and Data Handling (C&DH) system used a cost-off-the-shelf electronics to process all data sent and received by the coronagraph, including the support system operation by RS232/422, USB3, Ethernet, and digital and analog signals. The flight software is developed using the core Flight System (cFS) which is a reusable software framework and set of reusable software applications which take advantage of a rich heritage of successful space mission of NASA. The flight software can process encoding and decoding data, control the subsystems, and provide observation autonomy. We developed a python-based testing framework to improve software reliability. The flight software development is one of the crucial contributions of KASI and an important milestone for the next project which is developing a solar coronagraph to be installed at International Space Station.

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An Analysis Tool for Flight Test of Airborne Display Software (항공기 시현계통 소프트웨어의 비행시험을 위한 분석도구)

  • Lee, Yong-Rae;Choi, Eu-Teum;Jun, Yong-Kee
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.46 no.11
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    • pp.961-968
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    • 2018
  • Airborne display systems provide pilots with a variety of information needed to operate aircraft. Software faults in the display system can seriously affect the operation of the aircraft, because it can provide inaccurate information to the pilot. Therefore, the software faults are identified and eliminated through ground testing and flight testing. This paper presents an analysis tool called FDR (flight data replay) for flight test of airborne display software. This tool works in real time with the mission computer of aircraft. Also, the tool reproduces the functional error conditions that appear in the display systems by applying flight test data to the display software.

BITSE Ground Software

  • Baek, Ji-Hye;Park, Jongyeob;Choi, Seonghwan;Kim, Jihun;Yang, Heesu;Kim, Yeon-Han;Swinski, Joseph-Paul A.;Newmark, Jeffrey S.;Gopalswamy, Nat.
    • The Bulletin of The Korean Astronomical Society
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    • v.44 no.2
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    • pp.58.1-58.1
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    • 2019
  • We have developed Ground Software (GSW) of BITSE. The ground software includes mission operation software, data visualization software and data processing software. Mission operation software is implemented using COSMOS. COSMOS is a command and control system providing commanding, scripting and data visualization capabilities for embedded systems. Mission operation software send commands to flight software and control coronagraph. It displays every telemetry packets and provides realtime graphing of telemetry data. Data visualization software is used to display and analyze science image data in real time. It is graphical user interface (GUI) and has various functions such as directory listing, image display, and intensity profile. The data visualization software shows also image information which is FITS header, pixel resolution, and histogram. It helps users to confirm alignment and exposure time during the mission. Data processing software creates 4-channel polarization data from raw data.

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