Fault diagnosis method, device, equipment and storage medium for a numerically controlled machine tool

Abstract

The present application discloses a fault diagnosis method, device, equipment and storage medium of a CNC machine tool, wherein the method includes: obtaining the reachability matrix and the fault propagation probability matrix of the fault propagation of the CNC machine tool to be diagnosed; The faults in the accessibility matrix are decomposed hierarchically to obtain a fault hierarchical propagation map; according to the fault hierarchical propagation map and the probability of occurrence of each fault in the fault propagation probability matrix, based on chain propagation, calculate the probability of each fault Global influence degree; according to the global influence degree of each described fault, the location of the fault cause of the CNC machine tool to be diagnosed is carried out, thereby solving the problem that the traditional graph theory diagnosis method is mostly based on the occurrence rate for fault location, and the accuracy of the location result is relatively low. Low, the fault located does not match the technical problem of the actual investigation situation.

Description

technical field [0001] The present application relates to the technical field of fault diagnosis, and in particular to a fault diagnosis method, device, equipment and storage medium of a numerically controlled machine tool. Background technique [0002] With the continuous upgrading of the manufacturing industry, the comprehensive guarantee of CNC machine tools has become the bottleneck of the development of my country's manufacturing industry today, and the fault diagnosis of CNC machine tools is one of the important technologies. [0003] Graph theory diagnosis method has become the main method for fault diagnosis of CNC machine tools because of its high accuracy, strong intuition, good versatility, great flexibility, and good convenience. The graph theory diagnosis method has an intuitive graphical expression, and has obvious advantages in the speed of fault model establishment and identification of new faults. [0004] However, the traditional graph theory diagnosis met...

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Problems solved by technology

[0005] This application provides a fault diagnosis method, device, equipment and storage medium for CNC machine tools, which solves the problem that the traditional graph theory diagnosis method is mostly based on the occurrence rate for fault location, the accuracy of the location result is low, and the location of the fault does not conform to reality Troubleshoot technical issues

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