Time-triggered Ethernet fault diagnosis method based on time synchronization state monitoring

Abstract

The invention provides a time-triggered Ethernet fault diagnosis method based on time synchronization state monitoring, and belongs to the field of airborne network communication technology, which is characterized in that a fault state is diagnosed by using a time deviation among communication nodes as a judgment condition in combination with a global unified time reference established by the time-triggered Ethernet. All end nodes and switches send local time reference information to adjacent switches, the switches correct and compare the received time reference information, judge the operation states of the adjacent nodes through the magnitude of the time deviation and feed back judgment results to the corresponding end nodes or switches. In the process, the physic communication links between adjacent devices, data sending and receiving modules of the both parties and communication software can be verified, the time-triggered Ethernet fault diagnosis method has the advantages of being simple and practical, easy to realize and high in reliability, and can be used for solving the problem that the existing dual redundancy communication system cannot effectively judge the fault at the same time.

Description

technical field [0001] The invention belongs to the technical field of airborne network communication and relates to a communication link fault diagnosis method. Background technique [0002] The airborne network communication system is a key component of the entire airborne avionics system. Failure of the communication system will lead to incorrect and reliable transmission of sensor feedback data or flight control computer control instructions, which will have a crucial impact on the safety of the aircraft and the completion of flight missions. In order to improve the reliability of network communication, redundant backup methods are generally used to avoid problems such as the reliability of a single link. Considering various factors such as cost and resource utilization, the time-triggered Ethernet communication system generally adopts a dual-redundancy switching network structure to avoid layer-by-layer backup of equipment. However, an important problem that dual-redun...

AI Technical Summary

Problems solved by technology

However, an important problem that dual redundancy communication systems have been facing is how to effectively perform redundancy voting and fault diagnosis, that is, how to identify the correct and faulty channels when there is an inconsistency between the two channels

If not handled properly, the dual-redundancy communication system will not only fail to improve system reliability, but will also increase the probability of system failure and errors, which is worse than the network reliability of single-channel

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