Fault diagnosis method based on multi-dimension information fusion

Abstract

The invention provides a fault diagnosis method based on multi-dimension information fusion. The method comprises the following steps: 1) data are collected, a sensitive parameter set is formed, and a fault diagnosis is started; 2) based on a conventional expert system diagnosis inference rule, an alarm sensitive parameter set is diagnosed to obtain an initial diagnosis conclusion; 3) according to a fault mechanism and a fault degradation law, a multi-dimension sensitive parameter matrix is constructed; 4) according to the conventional expert system inference rule, each sensitive parameter set in the sensitive parameter matrix is diagnosed to generate a corresponding fault matrix; 5) according to the fault degradation law of different fault types, a weight matrix is designed; and 6) the fault matrix and the weight matrix are used to solve a diagnosis conclusion after fusion. In the invention, the accuracy of the fault diagnosis can be improved; at the same time, the method can eliminate the conflict between the single-measure-point single-time-point signal abnormality fault and the diagnosis conclusion according to different time point information in the fault degradation process; and the method of the invention plays a positive engineering guidance role for the on-site equipment management and monitoring personnel.

Description

technical field [0001] The invention belongs to the technical field of equipment fault diagnosis, and relates to a fault diagnosis method based on multi-dimensional information fusion. Background technique [0002] Equipment is an indispensable part of all walks of life in the national economy, especially the petrochemical industry. Once a serious failure occurs, it will definitely bring huge economic losses to the entire enterprise. Therefore, it is of great significance to study equipment fault diagnosis technology and improve the accuracy of fault diagnosis to reduce the economic loss of enterprises. Since the 1960s, people have gradually carried out equipment fault diagnosis technology research. In recent years, with the development of computer technology and signal processing technology, fault diagnosis is developing toward automation and intelligence, and diagnostic expert systems based on different technologies have emerged as the times require. The expert system cu...

AI Technical Summary

Problems solved by technology

[0004] My published patent application for "Multi-dimensional fault diagnosis method based on expert thinking" (publication number CN103149046A) is the prototype of fusion diagnosis based on multi-measurement point and multi-time point information, but many details of it are not clear. The detailed description of the three-dimensional sensitive parameter matrix and the design rules of the weight matrix are given, and the selected measurement points and no data at the time point are not considered in the fault matrix

Images