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Washhouse carrying equipment fault diagnosis method based on fault tree

A handling equipment and fault diagnosis technology, which is applied in the fault tree-based storage and handling equipment fault diagnosis field, can solve the problems of time-consuming and labor-intensive, difficult location of fault points, increased diagnosis costs, etc., and achieve the effect of solving high maintenance costs

Active Publication Date: 2017-07-28
NINGBO RUYI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of manual troubleshooting is not easy to locate the fault point, which is time-consuming and labor-intensive.
It is obviously impractical to arrange a large number of status information collection points for fault diagnosis, which will not only increase the cost of diagnosis, but also in a relatively closed system, it is difficult to detect the status of each component

Method used

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  • Washhouse carrying equipment fault diagnosis method based on fault tree
  • Washhouse carrying equipment fault diagnosis method based on fault tree
  • Washhouse carrying equipment fault diagnosis method based on fault tree

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as figure 1 As shown, a fault tree-based fault diagnosis method for storage and handling equipment includes the following steps:

[0050] Stp1: Write a fault tree analysis program in MATLAB software, which includes a qualitative analysis module and a quantitative analysis module.

[0051] Stp2: Select the top event, select the fault top event and its code for the common faults that occur during the use of storage and handling equipment, top events include high pedal fault, pre-charging fault, overcurrent, controller overheating, main circuit power failure, current sampling Failure, battery management system failure, battery pack undervoltage, battery pack overvoltage, motor overheating, acceleration failure, horn failure, equipment cannot move forward, equipment can only move slowly, the lifting arm cannot rise, the lifting height of the lifting arm is wrong, and the handling Arm down failure.

[0052] Stp3: Establish a fault tree, confirm the basic event, bottom...

Embodiment 2

[0059] Such as figure 2 As shown, in this embodiment, on the basis of the foregoing embodiments, the operation of the qualitative analysis module includes the following steps:

[0060] Stp401: Input the normalized fault tree structure, the program uses the descending method to obtain all the cut sets of the fault tree, starting from the top event, search and replace from top to bottom, and increase the number of elements contained in the set when it encounters an AND gate, and when it encounters The OR gate increases the number of cut sets and outputs a cut set matrix. The number of rows of the matrix is ​​the number of cut sets, and each row element is the code corresponding to the bottom event of the cut set.

[0061] Stp402: Use the sorting function to sort the bottom events of each row in the cutset matrix according to the order of codes from small to large.

[0062] Stp403: Using the law of idempotence X i ∩X i =X i Simplify each row of the cut set matrix, compare th...

Embodiment 3

[0068] Such as image 3 As shown, in this embodiment, on the basis of the foregoing embodiments, the operation of the quantitative analysis module includes the following steps:

[0069] Stp501: Disjointize the minimum cut set to obtain a disjointization matrix. When the number of minimum cut sets in the fault tree and the repeated basic events in the minimum cut set are large, directly using the tolerance-exclusion theorem to calculate will greatly increase the amount of calculation, so in order to prevent the combination explosion, it is necessary to complete the corresponding minimum cut set first Computing after disjoint processing operations can effectively improve computing efficiency.

[0070] Stp502: traverse the disjointization matrix to find the disjointization expression of the top event, and calculate the occurrence probability of the top event according to the formula. The calculation formula for the occurrence probability of the top event is:

[0071]

[0072...

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Abstract

The invention discloses a washhouse carrying equipment fault diagnosis method based on a fault tree. The method includes the following steps that 1, a fault tree analysis program is written in mathematical software; 2, top events are selected; 3, a fault tree is built; 4, the fault tree is input into the program, and qualitative analysis of faults is conducted; 5, a bottom event occurrence probability matrix is built and input into the program, and quantitative analysis of the faults is conducted; 6, a fault diagnosis sequence is obtained, and a diagnose decision tree is given; 7, the diagnose decision tree is given after being transformed into a diagnosis flow chart. According to the method, the fault tree analysis program is written based on the analysis thought of a fault tree descending method, and qualitative and quantitative analysis of the fault tree can be conducted; based on the working principle of washhouse carrying equipment and a circuit structure chart, the fault tree is built for common equipment faults appearing in the production process, and after the fault tree is input into the program, reasonable and effective diagnosis steps are automatically given, which helps a user rapidly and accurately find the equipment faults.

Description

technical field [0001] The invention relates to the field of fault diagnosis, in particular to a fault tree-based fault diagnosis method for storage and handling equipment. Background technique [0002] With the rapid development of industrial technology, more and more automation equipment is used in the daily production process. Storage and handling equipment, as the main force in material handling tools, plays an extremely important role in the logistics system. Various types of failures will inevitably occur during the use of storage and handling equipment. At the current stage of production, after equipment failures, traditional maintenance methods are generally used. That is, when the fault is relatively simple, the user will carry out some basic maintenance work under the guidance of the manufacturer; when the fault is more complicated, the manufacturer will send professional maintenance personnel to the site to carry out troubleshooting inspection and maintenance work...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 冯振礼田丰杨泽锋
Owner NINGBO RUYI
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