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A Fault Location Method for Aircraft Cable Network Based on Graphical Matching Algorithm

A technology of matching algorithm and positioning method, which is applied to the fault location, and uses the pulse reflection method to detect faults, etc.

Active Publication Date: 2016-09-07
CIVIL AVIATION UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the multi-branch structure of the aircraft cable network, the multiple reflections caused by various types of cables, and the multiple reflection attenuation of the signal, the emission waveform obtained by reflection measurement alone cannot accurately locate the fault type and location.

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  • A Fault Location Method for Aircraft Cable Network Based on Graphical Matching Algorithm
  • A Fault Location Method for Aircraft Cable Network Based on Graphical Matching Algorithm
  • A Fault Location Method for Aircraft Cable Network Based on Graphical Matching Algorithm

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Embodiment Construction

[0018] A method for locating an aircraft cable network fault based on a graph matching algorithm of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

[0019] figure 1 The overall process of the method for locating faults in an aircraft cable network based on graphic matching of the present invention includes: collecting the reflection waveforms of fault-free cable networks of various aircraft cable network structures as the template waveforms during the fault location graphic matching operation; The above waveforms are imported into the database to establish a fault-free cable network reflection waveform information database; the faulty cable network is detected to obtain the faulty cable network reflected waveform; by calling the template waveform in the information database, the graph matching operation is performed to find a match. Then, according to the similarity coefficient and difference coefficient, the faul...

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Abstract

The invention provides an aircraft cable network fault location method based on graphic matching, which includes: collecting non-fault reflected waveforms of various aircraft cable network structures as template waveforms for fault location graphic matching operations; importing the above-mentioned waveforms through an interface protocol Establish a non-faulty reflection waveform information database in the database; detect the faulty cable network to obtain the faulty cable network reflection waveform; call the template waveform in the information database, find the matching template waveform through graphic matching operations, and determine the occurrence The branch structure of the cable network of the fault; and then determine the fault type and the specific branch location of the fault according to the similarity coefficient and the difference coefficient.

Description

technical field [0001] The invention belongs to the field of fault diagnosis, in particular to a method for locating faults in an aircraft cable network based on a graph matching algorithm. Background technique [0002] Aircraft cable refers to a hardware device that provides power energy and transmits control signals for the electrical system on the aircraft. It is composed of connecting wires, connectors and many other devices. Energy and information channels play a vital role in flight control and flight safety. With the rapid development of aviation technology, more and more cutting-edge technologies in the world are used in modern aircraft, and its airborne equipment reflects the advanced scientific and technological achievements of many professional categories. Airborne equipment includes power system, hydraulic system, fuel system, air conditioning system, flight control system, electrical system, navigation system, communication system, landing gear system, etc. and...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/11
Inventor 石旭东刘承宗李晓晖李鹏举
Owner CIVIL AVIATION UNIV OF CHINA