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Reconstruction system and reconstruction method applied to time-triggered communication of avionics system

An avionics system, time-triggered technology, applied in the field of avionics, can solve problems such as application failure, and achieve the effect of improving the ability to resist failure and resource utilization

Active Publication Date: 2019-11-05
BEIHANG UNIV
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  • Claims
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Problems solved by technology

[0006] In order to solve the problem that the application residing on the time-triggered network of the avionics system fails due to the failure of the end system module, the present invention proposes a reconfiguration method applied to the time-triggered communication of the avionics system

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  • Reconstruction system and reconstruction method applied to time-triggered communication of avionics system
  • Reconstruction system and reconstruction method applied to time-triggered communication of avionics system
  • Reconstruction system and reconstruction method applied to time-triggered communication of avionics system

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Embodiment 1

[0190] In an avionics system, an application consists of a set of specific tasks, and the completion of the tasks depends on the sending and receiving of corresponding messages. As a mixed safety-critical system, applications in avionics systems have different levels of safety-criticality. The tasks contained in the application with high safety-critical level have higher priority, and the high-priority tasks generate high-priority messages. Therefore, applications with a high safety-critical level correspond to high-priority messages. The specific correspondences applied to the messages are stored in the system blueprint (run-time) module 40 .

[0191] When the physical link bandwidth is 100Mbps, the network topology includes 5 end system modules and 2 switch modules (such as Figure 2A shown). A total of 5 applications are set, corresponding to 300 time-triggered messages, as shown in Table 1. The message period is an integer multiple of 1000μs, and takes a value in [1000...

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Abstract

The invention discloses a reconstruction system and a reconstruction method applied to time-triggered communication of an avionics system. The reconstruction system is characterized in that an end system fault recording module, a resource checking module, a configuration generation module and a reconstruction execution module are additionally arranged in a traditional avionics system. The reconstruction method comprises the steps of selecting a reconstruction strategy after an end system fails, executing migration type reconstruction according to backup resources of a redundant end system, executing preemptive type reconstruction according to available idle resources, and executing degradation type reconstruction if resources are insufficient. According to the reconstruction method, on thebasis of application migration, association from applications to messages is established, and for different resource constraint conditions, the fault problem of application failure on an end system module is solved in a mode of designing message secondary scheduling. The reconstruction method is based on a satisfiability model theory scheduling method, and can recover faults of the support end system when the avionics system operates.

Description

technical field [0001] The present invention relates to the technical field of avionics, and more particularly refers to a reconfiguration method applied to time-triggered communication of an avionics system. The reconfiguration method can realize message-level fault recovery of an end system in an avionics time-triggered network. Background technique [0002] In recent years, the integrated avionics system has experienced the development process of discrete, combined, integrated and highly integrated. At present, the highly integrated distributed integrated modular avionics (Distributed Integrated ModularAvionics, DIMA) architecture has become the development direction of avionics systems. All integrated modules are distributed throughout the aircraft using a distributed architecture, and strict periodic determinism of safety-critical messages is achieved through a time-triggered network. "Advanced Avionics Integrated Technology", the first printing and publishing of the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/54G06F11/07
CPCG06F9/546G06F11/0751
Inventor 何锋高杨王彤
Owner BEIHANG UNIV
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