Processing method for imperfection failure diagnosis information

A technology of fault diagnosis and processing method, which is applied in the direction of electrical testing/monitoring, etc., and can solve problems such as meaningless fault diagnosis decision rules, fault diagnosis information errors, affecting the objectivity of information and the correctness of results, etc., to improve the use value, The effect of accurate fault diagnosis information and maintaining objective authenticity

Inactive Publication Date: 2009-03-18
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0003] The processing method of incomplete fault diagnosis information proposed by the present invention solves the following problems: 1. When there are few samples of fault diagnosis information, deleting a small amount of incomplete fault diagnosis information will seriously affect the objectivity of information and the correctness of results. As a result, the obtained fault diagnosis decision rules are meaningless; 2. Relying on purely mathematical statistical laws to complete the incomplete fault diagnosis information does not necessarily fully conform to the objective facts, and if the filled information is incorrect, it will introduce New noise, which leads to wrong fault diagnosis information and misdiagnosis

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  • Processing method for imperfection failure diagnosis information

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specific Embodiment approach 1

[0014] The specific steps of the method described in this embodiment are:

[0015] Step 1: Establish a decision table for incomplete fault diagnosis information. First, fill in the decision table according to the incomplete fault diagnosis information in the database. The first column of the decision table for incomplete fault diagnosis information is the fault object field U, U={x 1 , x 2 , x 3 ,... x n}; The second column is the number k of occurrences of elements in the fault object domain U, k is a positive integer; M is the fault symptom attribute set, M={c 1 , c 2 , c 3 ,... c m}, then the 3rd column to the (3+m) column is the fault symptom attribute corresponding to the fault symptom value of the fault object; the (4+m) column is the fault decision attribute d corresponding to the fault object and its value; then Obtain the generalized decision attribute set corresponding to the fault object in the last column according to the incomplete fault diagnosis informatio...

specific Embodiment approach 2

[0023] Specific Embodiment 2: This embodiment will be described by taking the power control center database containing incomplete fault diagnosis information as an example.

[0024] Step 1: Establish a decision table for incomplete fault diagnosis information:

[0025] Table 1 Decision table of incomplete fault diagnosis information

[0026] U k c 1 c 2 c 3 c 4 c 5 c 6 c 7 c 8 d generalized decision attribute set x 1 2 M M L N Q N 1 1 S {S} x 2 1 * M * N Q * 1 1 S {S,U 2 } x 3 3 M L L * Q * * 1 S {S,U 1 } x 4 2 * * M N N N 0 1 S {S} x 5 1 M * L * Q N 1 1 S {S,U 1 } x 6 1 * M * N * * 1 1 S {S,U 2 } x 7 3 L * L * * Q * 1 U 2 {S,U 1 , U 2 } x 8 2 L * M Q P * 0 1 U 2 {U 1 , U 2 } x 9 1 * M M * P Q * 1 U 2 {S,U 1 , U 2 } x 10 1 L M * Q N * 0 1 U 2 {U1,U 2 } x 11 1 H * M ...

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Abstract

A processing method for incomplete failure diagnosis information relates to a diagnostic method for equipment failures, which solves problems including 1, the elimination method, eliminating a small number of incomplete failure diagnosis information, can severely impact information objectivity and result accuracy, thereby resulting in insignificance of the obtained failure diagnosis decision rules, 2, the completion method, completing the incomplete failure diagnosis information, can be divorced objective facts, and if inaccurate information are filled in, additional noise can be led in, thereby causing errors of failure diagnosis information and further resulting in a misdiagnosis. The processing method includes firstly filling an incomplete failure diagnosis decision table according to incomplete information in database, building up a resolution matrix table for failure targets according to the incomplete failure diagnosis information decision table, reducing resolution matrix elements corresponding to failure diagnosis target on each line of the resolution matrix table, and finally obtaining an optimum failure diagnosis decision rule table. The invention is adaptable to diagnosis of equipment failures.

Description

technical field [0001] The invention relates to a method for diagnosing equipment faults, in particular to a method for obtaining optimal fault diagnosis from incomplete fault diagnosis information. Background technique [0002] Modern enterprises usually establish corresponding fault diagnosis databases for important mechanical equipment, but due to the constraints of the complexity of working conditions and operating environment, some fault diagnosis information is incomplete to some extent, but these incomplete faults Diagnostic information contains a wealth of equipment operating information. At present, the processing methods of incomplete fault diagnosis information often adopt the following two processing strategies: (1) Deletion method, which is to delete samples containing incomplete fault diagnosis information, so as to obtain a complete fault diagnosis information and then obtain fault diagnosis decision rules ; (2) Complementary method, which is to fill in some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
Inventor 黄文涛王伟杰赵学增
Owner HARBIN INST OF TECH
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