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A multi-switch parameter fault diagnosis method based on template matching

A fault diagnosis and template matching technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc.

Inactive Publication Date: 2016-02-17
PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the fault diagnosis for these two types of switching values ​​can only be carried out one-to-one, and for the state combination of multiple switching value signals of various devices with higher and higher integration problem helpless

Method used

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  • A multi-switch parameter fault diagnosis method based on template matching
  • A multi-switch parameter fault diagnosis method based on template matching
  • A multi-switch parameter fault diagnosis method based on template matching

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Experimental program
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Embodiment

[0044] The equipment in the present embodiment has 3 switches, i.e. n=3, the specific implementation steps:

[0045] Step 1: By analyzing the working principle of the equipment, obtain the timing diagram of the switch state change when the equipment is in normal operation, such as Figure 5 shown;

[0046] Step 2: by Figure 5 It can be seen that there are 7 state transitions in the normal operation of the equipment, that is, q=7, and the initial state set K 0 = {0, 0, 1} T , the switch state sets after each conversion are K 1 ={1,1,1} T 、K 2 = {0, 1, 0} T 、K 3 = {0, 0, 0} T 、K 4 ={1,0,0} T 、K 5 = {0, 1, 1} T 、K 6 ={1,0,0} T 、K 7 = {1, 1, 0} T ; During the normal operation of the equipment, the transition moments of all switching states constitute a time series set T: {3, 5, 7, 9, 11, 16, 20}, and t 0 =0, the intervals between state transitions are 3, 2, 2, 2, 2, 5, and 4, respectively. Arrange the switch state sets when the equipment is in normal operation t...

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Abstract

The invention relates to a multiple switch parameter fault diagnosis method based on template matching. A plurality of switch state parameters when a detected device runs normally are used for generating a state conversion table independent of time and a standard timing sequence conversion table which are divided into a state template and a timing sequence template; switch state parameters when the device runs actually are measured in real time, and an actual state conversion table and an actual timing sequence conversion table are generated; and the actual state conversion table is compared with the state template, the actual timing sequence conversion table is compared with the timing sequence template, state error or timing sequence error is obtained, and then a fault happening to the device is judged. Compared with the prior art, the method not only changes the current situation that fault diagnosis of two types of the switch parameters can only be carried out one to one, but also can solve problems occurring in the state combination of a plurality of switch parameter signals of various devices which are higher and higher in integration level, wherein flexible generation can be realized according to actual devices, has a wide range of application, and is particularly suitable for being used by front-line operators.

Description

technical field [0001] The invention relates to fault diagnosis technology, in particular to a multi-switch parameter fault diagnosis method based on template matching. Background technique [0002] In the fields of industrial production, aerospace and national defense, as many devices gradually become larger and more complex, the possibility of failures also increases. The key to ensuring the safe operation of the equipment and the smooth completion of tasks is whether it can effectively monitor the operating status of the equipment and quickly and accurately diagnose the faults of the equipment. [0003] The existing monitoring methods generally measure the state parameters of the equipment in real time, analyze the characteristic information of the equipment contained in it, and then judge the current state of the equipment according to a certain fault diagnosis strategy, so as to realize the fault diagnosis of the equipment. [0004] Switching value is the main type of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01R31/02
Inventor 蔡伟孙凌逸杨志勇张金玉黄先祥高钦和戴民强张志永
Owner PLA SECOND ARTILLERY ENGINEERING UNIVERSITY