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A small satellite voting communication abnormality diagnosis method

A communication abnormality and diagnostic method technology, applied in the field of small satellite voting communication abnormality diagnosis, can solve problems such as prone to failure, false alarm and missed report, and achieve improved on-orbit reliability, improved reliability, and high adaptability and the effect of extending

Active Publication Date: 2020-07-31
CHANGGUANG SATELLITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for diagnosing anomalies in small satellite voting communication in order to solve the problems of "single-point" diagnosis points in the existing on-board computer diagnosis methods, which are prone to malfunctions, false alarms and missed reports, etc.

Method used

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  • A small satellite voting communication abnormality diagnosis method
  • A small satellite voting communication abnormality diagnosis method
  • A small satellite voting communication abnormality diagnosis method

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specific Embodiment approach 1

[0023] Specific implementation mode 1. Combination Figure 1 to Figure 7 To illustrate this embodiment, a small satellite voting communication abnormality diagnosis method is designed, that is, a multi-machine cooperative voting method based on the CAN bus communication network on the small satellite star to realize the communication abnormality diagnosis of single machine components. A multi-host joint voting diagnosis mechanism is designed on the bus, and the CAN bus broadcast mode is used to communicate, a set of diagnostic broadcast frame protocols is designed and a time-limited response method is used to realize the voting of the single-machine communication state.

[0024] There are N nodes participating in voting on a CAN bus network, N is a positive integer and N≤16; the voting process is that the forward node completes the voting of the backward node, and finally the Nth node completes the voting of the first node. In each voting cycle, all nodes will send data once. ...

specific Embodiment approach 2

[0041] Specific embodiment two, combine Figure 4 to Figure 7 Describe this embodiment, this embodiment is an embodiment of a small satellite voting communication abnormality diagnosis method described in the first embodiment: this embodiment takes the CAN bus network of five nodes as an example, and describes the communication fault diagnosis process in detail :

[0042] 1. Initial process

[0043] 1) if Figure 4 As shown, after the nodes on the CAN bus are powered on, they are all in the signature state, and the signature frame is sent from node 0 by default, and the data field is filled with 0 by default;

[0044] 2) Other nodes start to send signature frames in turn after receiving the signature frame from the previous node, and the data field is filled with 0 by default;

[0045] 3) After all nodes send the signature frame, node 0 starts to send the voting normal frame, because the voting normal frame of other nodes has not been received, the data field status is fill...

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Abstract

The invention relates to a mini-satellite vote type communication abnormality diagnosis method. The problem that the fault, the false alarm and the false negative are easy to occur since a single-point diagnosis point is existent in the existing onboard computer diagnosis method is solved. The method comprises the following steps: designing a diagnosis mechanism in multi-host joint vote on a CAN bus in a daily chain topology way, designing a diagnosis broadcast frame protocol by adopting a CAN bus broadcast way to communicate, and realizing the vote of a standalone communication state by usinga time-limited response way; setting the existence of N nodes on the CAN bus to circularly communicate in order, wherein each node has four working states: the signature state, the vote state, the question state and the isolation state; summarizing communication states of N-1 nodes to finish the vote on one node; after voting that one node is abnormal, isolating this node from a voting group, wherein the voting group still has the diagnosis capacity after one node is isolated, and the node amount in the voting number is dynamically updated along the node state change, and has higher suitability and expansibility.

Description

technical field [0001] The invention relates to a small satellite voting communication abnormality diagnosis method. Background technique [0002] At present, the on-board autonomous communication abnormal diagnosis technology in the satellite field usually adopts the method of adding an abnormal diagnosis module to the software of the on-board computer. The diagnosis method has the following defects: the main function of the on-board computer is to complete the satellite’s in-orbit flight mission, and the abnormality diagnosis module takes up too much resources, which will affect the execution of the normal flight mission of the satellite; at the same time, the entire satellite only uses the on-board computer for communication abnormality diagnosis. This constitutes a "single-point" diagnostic point. When the on-board computer is disturbed by harsh environments such as noise, electromagnetic interference, space particle radiation, and vibration, or the communication module ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04B7/185H04L12/40
CPCH04B7/18519H04L12/40078H04L41/06H04L2012/40215
Inventor 王佳增陈茂胜李小明张鑫
Owner CHANGGUANG SATELLITE TECH CO LTD