A Fault Monitoring and Diagnosis Method for On-orbit 1553b Bus Network

Abstract

The invention discloses an on-orbit fault monitoring and diagnosing method for a 1553B bus network. A RT terminal in the bus network is selected for function reuse, a bus network fault monitoring and diagnosing function is added to the RT terminal, and thus the bus network has the capacity of concentrated monitoring, concentrated diagnosing and distributed processing faults. The reused RT terminal is responsible for monitoring transmission abnormity of messages, fault modeling and fault diagnosing based on a flight mission profile, and distributing a fault diagnosis result to a bus controller and other RT terminals, thus achieving on-orbit autonomous processing of the faults of the 1553B bus network. According to the method provided by the invention, addition of a bus monitoring module with independent functions is not needed on an orbit, a data transmission state of the whole bus network is monitored by the RT terminal with the reused functions in a concentrated manner, a 1553 bus network fault feature library is generated based on the flight mission profile, and autonomous fault diagnosis and health management are provided for the satellite bus network. The method is applied to the launched satellites with good effects, and is good in popularization and application prospects.

Description

technical field [0001] The invention relates to a fault monitoring and diagnosing method for a 1553B bus network, in particular to a method for fault modeling based on a flight mission profile and a centralized monitoring and diagnosing method for on-orbit bus faults, which belongs to the field of satellite data transmission networks. Background technique [0002] In current satellite system design, the 1553B bus is generally used as the data communication backbone network. The reliability of the 1553B bus network directly determines whether the satellite system is normal or not. The fault monitoring and diagnosis methods of the 1553B bus network are mainly divided into two categories: distributed monitoring and diagnosis methods, centralized monitoring and diagnosis method [0003] Distributed monitoring and diagnosis method: All communication nodes in the bus network must participate in the monitoring and diagnosis of faults. The disadvantages of this method are (1) Each c...

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Problems solved by technology

[0003] Distributed monitoring and diagnosis method: All communication nodes in the bus network must participate in the monitoring and diagnosis of faults. The disadvantages of this method are (1) Each communication node has a fault monitoring and diagnosis module, which will increase the complexity of the system and increase the system cost. (2) The fault monitoring and diagnosis methods used by each communication node vary greatly, and the implementation effect of the method varies; (3) The fault information that each communication node can monitor is limited, and one-sided fault information may affect the fault diagnosis result

The disadvantages of this method are (1) the bus network needs to add an additional bus monitoring module with independent functions, which increases the system cost; (2) the on-orbit does not have the ability to self-diagnose faults, and it needs to be completed with the cooperation of the ground

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