• Title/Summary/Keyword: byteflight

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Cause Analysis and Improvement of Signal Interference in Byteflight Data Bus

  • Kwon, Jung-Hyuk;Tak, Su-Pyeong;Kwon, Ik-Hyun;Lee, Wang-Sang
    • Journal of Aerospace System Engineering
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    • v.15 no.6
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    • pp.50-58
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    • 2021
  • Byteflight is developed based on RS-485 communication (an international standard), and it can be used as a data bus during the operation of an integrated avionics system in the latest aircraft. Therefore, the integrated avionics system can perform an effective and safe flight mission only when the accurate and seamless display of flight information, communication, and accurate functions of navigation are implemented. In this study, cause analysis and failure investigation were performed on screen abnormalities and communication interruptions due to signal interference in the Byteflight data bus of the integrated avionics system during aircraft operation. To improve signal interference between avionics units, the branch point and wiring path of the Byteflight data bus were changed, and the verification result of the improved method was also described.

Performance Evaluation of Network Protocol for Protocol for Crane System (자동화 크레인을 위한 네트워크 프로토콜의 성능 평가)

  • Nam Kyoung-Nam;Kim Man-Ho;Lee Kyung Chang;Lee Suk
    • Journal of Institute of Control, Robotics and Systems
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    • v.11 no.8
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    • pp.709-716
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    • 2005
  • As a way to build more efficient and intelligent container cranes for todays hub ports, communication networks are used to interconnect numerous sensors, actuators, controllers, and operator switches and consoles that are spatially distributed over a crane. Various signals such as sensor values and operator's commands are digitized and broadcast on the network instead of using separate wiring cables. This not only makes the design and manufacturing of a crane more efficient, but also easier implementation of intelligent control algorithms. This paper presents the performance evaluation of CAN(Controller Area Network), TTP(Time Triggered Protocol) and Byteflight that can be used for cranes. Through discrete event simulation, several important quantitative performance factors such as the probability of a transmission failure, average system delay (data latency) and maximum system delay have been evaluated.