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Volume 38 Issue 2
Feb.  2012
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Journal of Beijing University of Aeronautics and Astronautics  > 2012  >  (2): 222-227.
Xia Jiqiang, Xue Liqiang, Man Qingfenget al. Real-time analysis and assessment method of time-triggered CAN-bus[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, (2): 222-227. (in Chinese)
Citation: Xia Jiqiang, Xue Liqiang, Man Qingfenget al. Real-time analysis and assessment method of time-triggered CAN-bus[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, (2): 222-227. (in Chinese)
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Real-time analysis and assessment method of time-triggered CAN-bus

  • School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 19 Oct 2010
  • Publish Date: 29 Feb 2012
    Abstract
  • To solve the problem that time-triggered CAN (controller area network) bus system lacked a unified real-time performance assessment method, a complete system establishment and assessment scheme was proposed. Time-triggered CAN-bus system scheduling matrix was established by using average-loading algorithm and periodic messages were guaranteed to transmit without delay by distributing them independent transmission windows within the system matrix. While considering the traditional CAN-bus transmission mechanism and the time-triggeredness feature, a calculation method was improved to calculate the worst-case delay of event-triggered messages in time-triggered CAN-bus system. The failure probability was calculated for event-triggered messages whose worst-case delay exceeded their deadlines. System design and assessment process was established for CAN-bus transmission system and parameter adjustment was proposed to optimize system real-time performance. This assessment method could improve the design efficiency and the final analysis result is more accurate and practical by considering the effects of the event-triggered messages worst-case delay and failure probability.

     

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