Method and system for performing components fault problem close loop analysis

Abstract

A method and system for performing component fault problem close loop analysis are provided. The system establishes a component failure physics fault tree, converts the failure physics fault tree into a failure locating fault tree, establishes, a component fault dictionary with failure mechanism cause corresponding to failure characteristics and performs fault problem close loop analysis to the component according to the fault tree and the fault dictionary. By the method and system of the present disclosure, it is possible to locate the component fault in the internal physical structure by the failure locating fault tree, to give a clear failure path, to quickly identify the failure mechanism corresponding to the component failure mode by analysis of failure feature vector of the fault dictionary, and to determine the mechanism factors and influencing factors of relevant failure mechanism by the failure physics fault tree. Thus, targeted failure control measures are proposed to achieve fast and accurate locating and diagnosis to the electronic component failure.

1 . A method for performing component fault problem close loop analysis, comprising:
 establishing, according to common characteristics of component failure physics, a component failure physics fault tree;
 converting a failure physics event into an observable node event according to the failure physics fault tree, and converting the failure physics fault tree into a failure locating fault tree; 
   establishing, according to the failure locating fault tree, a component fault dictionary with failure mechanism cause corresponding to failure characteristics; and
 performing fault problem close loop analysis to the component according to the failure physics fault tree and the component fault dictionary. 
   
     
     
         2 . The method of  claim 1 , wherein the common characteristics of component failure physics comprise: fault object, failure mode, failure site, failure mechanism, mechanism factor, and influencing factor. 
     
     
         3 . The method of  claim 1 , wherein the step of converting the failure physics fault tree into a failure locating fault tree further comprises:
 determining an observable node between a failure mode and a failure mechanism, and representing an immeasurable event of failure physics by an observable node event;   selecting, according to the structure and performance characteristics of the component, feature parameters representing each node, the feature parameters being observable parameters, the observable parameters including: electrical properties, thermal properties, mechanical properties, the apparent characteristic, gas confidentiality, and environmental adaptability;   
       representing a component failure event by a node failure event, and representing the node failure event by the observable parameters; and
 establishing a component failure locating fault tree, the fault tree having the failure mode as top event, the observable node as intermediate event, and the failure mechanism as bottom event. 
 
     
     
         4 . The method of  claim 1 , wherein the step of establishing, according to the failure locating fault tree, a component fault dictionary with failure mechanism cause corresponding to failure characteristics further comprises:
 determining, according to the failure positioning fault tree, a component failure mode set, the set including multiple subsets of failure mode;   determining, according to the failure positioning fault tree, observable node of the subset of failure mode in a failure mode;   obtaining, according to the failure positioning fault tree, observed parameters from the observable node, and obtaining feature value of the observable node in the failure mode according to the observed parameters;   determining, according to the feature value of the observable node, feature vector of the component in all failure modes;   
       determining, according to the failure positioning fault tree, failure mechanism cause of the component; and
 establishing, according to the failure mechanism cause and the feature value of the observable node, a component fault dictionary with failure mechanism cause corresponding to failure characteristics. 
 
     
     
         5 . The method of  claim 1 , wherein the step of performing fault problem close loop analysis to the component according to the failure physics fault tree and the component fault dictionary further comprises:
 observing the component according to the node parameters of the component fault dictionary, and obtaining feature value of an observed vector;   comparing the feature value of the observed vector and the component fault dictionary, and determining the failure mechanism cause of the component;   looking for, according to the failure mechanism cause, the mechanism factors and influencing factors corresponding to the failure mechanism in the failure physics fault tree, so as to propose measures against the failure mechanism.   
     
     
         6 . A system for performing component fault problem close loop analysis, comprising:
 a failure physics fault tree establishing module, configured to establish, according to common characteristics of component failure physics, a component failure physics fault tree;   a failure locating fault tree establishing module, configured to convert a failure physics event into an observable node event according to the failure physics fault tree, and to convert the failure physics fault tree into a failure locating fault tree;   a fault dictionary establishing module, configured to establish, according to the failure locating fault tree, a component fault dictionary with failure mechanism cause corresponding to failure characteristics; and   a fault problem close loop analyzing module, configured to perform fault problem close loop analysis to the component according to the failure physics fault tree and the component fault dictionary.   
     
     
         7 . The system of  claim 6 , wherein the common characteristics of component failure physics comprise: fault object, failure mode, failure site, failure mechanism, mechanism factor, and influencing factor. 
     
     
         8 . The system of  claim 6 , wherein the failure locating fault tree establishing module further comprises:
 an event conversion unit, configured to determine an observable node between a failure mode and a failure mechanism, and to represent an immeasurable event of failure physics by an observable node event;   a feature parameters selecting unit, configured to select, according to the structure and performance characteristics of the component, feature parameters representing each node, the feature parameters being observable parameters, the observable parameters including: electrical properties, thermal properties, mechanical properties, the apparent characteristic, gas confidentiality, and environmental adaptability;   a parameter representing unit, configured to represent a component failure event by a node failure event, and to represent the node failure event by the observable parameters; and   a fault tree establishing unit, configured to establish a component failure locating fault tree, the fault tree having the failure mode as top event, the observable node as intermediate event, and the failure mechanism as bottom event.   
     
     
         9 . The system of  claim 6 , wherein the fault dictionary establishing module further comprises:
 a failure mode set determining unit, configured to determine, according to the failure positioning fault tree, a component failure mode set, the set including multiple subsets of failure mode;   an observable node determining module, configured to determine, according to the failure positioning fault tree, observable node of the subset of failure mode in a failure mode;   a feature value obtaining unit, configured to obtain, according to the failure positioning fault tree, observed parameters from the observable node, and to obtain feature value of the observable node in the failure mode according to the observed parameters;   a feature vector obtaining unit, configured to determine, according to the feature value of the observable node, feature vector of the component in all failure modes;   a failure mechanism determining unit, configured to determine, according to the failure positioning fault tree, the failure mechanism cause of the component; and   a fault dictionary establishing unit, configured to establish, according to the failure mechanism cause and the feature value of the observable node, a component fault dictionary with failure mechanism cause corresponding to failure characteristics.   
     
     
         10 . The system of  claim 6 , wherein the fault problem close loop analyzing module further comprises:
 an observing unit, configured to observe the component according to the node parameters of the component fault dictionary, and to obtain feature value of an observed vector;   a comparing unit, configured to compare the feature value of the observed vector and the component fault dictionary, and to determine the failure mechanism cause of the component;   a look-up unit, configured to look for, according to the failure mechanism cause, the mechanism factors and influencing factors corresponding to the failure mechanism in the failure physics fault tree, so as to propose measures against the failure mechanism.