CN112668138B

CN112668138B - FMEA (failure mode and effects analysis) method and device for realizing function and failure correlation

Info

Publication number: CN112668138B
Application number: CN202010094311.4A
Authority: CN
Inventors: 曹旭峰
Original assignee: Anhui Guomai Information Technology Co ltd
Current assignee: Scmyun Shanghai Information Technology Co ltd
Priority date: 2020-02-15
Filing date: 2020-02-15
Publication date: 2022-12-30
Anticipated expiration: 2040-02-15
Also published as: CN112668138A

Abstract

The invention relates to the technical field of failure analysis of products or processes, in particular to an FMEA (failure mode and effects analysis) method for realizing function and failure correlation, which comprises the following steps: inputting superior requirements and defining the scope and purpose of analysis; creating a product 'structure tree' and generating the function of the product 'structure tree'; utilizing the function failure matrix to identify and correlate the superior and inferior transfer relations among the functions to generate a functional network; identifying and correlating failure contents on the basis of the identified functional association to generate a failure network; completing risk analysis and optimization according to the function and failure association; and outputting DFMEA results based on function and failure correlation. The invention makes the logic clear and the operation simple.

Description

FMEA (failure mode and effects analysis) method and device for realizing function and failure correlation

Technical Field

The invention relates to the technical field of failure analysis of products or processes, in particular to an FMEA (failure mode and effects analysis) method and device for realizing function and failure correlation.

Background

FMEA (Failure Mode and Effects Analysis) is a set of serialized activities that aim to discover, evaluate potential failures and their consequences in a product/process, find measures that can avoid or reduce the occurrence of these potential failures, and summarize the above process in writing.

The FMEA analysis method mainly comprises the following steps:

s1, displaying products at all levels contained in a project in a tree form to form a product tree, performing interface analysis on a single product by adopting a block diagram and an interface analysis table, determining an internal interface and an external interface of the product, and forming a structure tree;

s2, describing all functions of a single product in a listing manner to form a function list, and identifying the relationship between each function and each interface by a method of a function interface matrix;

s3, identifying the relation between functions of the upper-layer product and the lower-layer product, establishing a 'function tree', screening out relevant information from the dimensionality of the functions, and generating a 'function net' of each function;

s4, describing the failure corresponding to each function in the function tree to form a failure list; identifying the relationship between the failure of the upper layer product and the failure of the lower layer product, establishing a primary failure tree, screening out relevant information from the dimension of the failure, and generating a failure tree net of each failure;

s5, acquiring failure mode description of an upper-layer product from the failure tree, and acquiring failure mode description of a lower-layer product from the failure tree as a failure consequence of the product, wherein the failure mode description is taken as a failure reason of the product; according to the description of the failure consequence, the severity is scored, according to the analysis of the failure reason, preventive measures are added, and the frequency is scored; adding detection measures and scoring the detection degree;

and S6, after the analysis is finished, forming a failure analysis table, exporting relevant information, forming a formatted DFMEA report, and updating a failure tree of the item.

The correlation operation in the FMEA analysis method in the prior art is mainly the correlation of separate functions or failures, and depends on the operation of manual free dragging, but the functions and the failures are not synchronized after the correlation, and the interface logic is not clear and friendly.

Disclosure of Invention

The invention aims to provide an FMEA (failure mode and effects analysis) method for realizing function and failure correlation, which ensures clear logic and simple operation.

The invention has the conception that the failure association relation can be automatically formed after the system realizes the function association, and the network function association diagram and the failure association diagram are derived by forming the failure chain after the user screening.

The technical scheme of the invention is that the FMEA analysis device for realizing function and failure correlation is characterized by comprising the following program modules:

the input module inputs superior requirements and defines the analysis range and purpose;

the building module is used for building a product 'structure tree' and generating the function of the product 'structure tree';

the function identification module is used for identifying and correlating the upper and lower-level transmission relation among the functions by using the function failure matrix to generate a functional network;

the 'failure' identification module is used for identifying failure contents and associating the failure contents on the basis of the identified functional association to generate a failure network;

the risk and optimization identification module is used for completing risk analysis and optimization after correlation according to functions and failures;

and the output module outputs the DFMEA result based on the function and failure correlation.

Further comprising: a transfer module that transfers information to the PFMEA upon outputting the DFMEA result based on the functional and failure correlation.

According to the input upper-level function requirements, the functions are distributed to the bottom-level parts step by step, and then the related upper-level and lower-level functions are displayed in a matrix form, so that a user can perform association judgment by combining professional knowledge and design purposes under the known condition, and further a function network is generated. And performing failure analysis according to the functions, performing failure association according to the association relationship, forming a failure chain transmitted up and down, and embodying the failure chain in the final report content.

The invention can realize the function transmission of the products at the upper level and the lower level, further realize the transmission of the upper failure chain and the lower failure chain, complete the transmission of failure severity and visually display the content association relation in a net shape.

Drawings

FIG. 1 is a flow chart of the present invention.

Fig. 2 is a schematic diagram of a functional web of the present invention.

FIG. 3 is a schematic diagram of a failure net of the present invention.

Fig. 4 is a schematic diagram of the association of the functional failure matrix of the present invention.

Detailed Description

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Referring to fig. 1, which is a flow chart of the FMEA analysis method of the present invention, comprising the steps of:

step 1: creating a DFMEA (differential design average membrane electrode assembly), inputting a superior function requirement, and defining the range and the purpose of the analysis; and building a product structure tree;

step 2: according to the input superior requirement, the function of the product structure tree is decomposed, and meanwhile, the interface of the product interface is analyzed in the block diagram, so that the function analysis of the structure tree product is completed;

and step 3: identifying the upper and lower level transmission relation double-click between functions in the function failure matrix to correlate and generate a function network;

and 4, step 4: identifying failure contents on the basis of the identified functional association, realizing failure association and generating a failure network;

and 5: completing subsequent analysis content according to the function and failure association;

step 6: and outputting DFMEA results based on the functional correlation and the failure correlation, and transmitting the information to the PFMEA.

Referring to fig. 2 to 4, the disablement matrix interface displays a variety of styles, such as differentiating the content levels with different color fonts and displaying the related content in a matrix form. The function failure matrix and the content of the structure tree are synchronous all the time, complete upper-level and lower-level contents can be displayed, automatic function association can be realized directly through failure association, a function network and a failure network can be checked directly on the function failure matrix, functions and failure transmission between the upper level and the lower level are visually displayed in a mesh manner, and the association relation is identified through a simple double-click operation mode; the operation is simple and the logic is strict; the working efficiency is improved.

Claims

1. An FMEA analysis method for realizing function and failure correlation is characterized by comprising the following steps:

inputting superior requirements and defining the scope and purpose of analysis;

creating a product 'structure tree' and generating the function of the product 'structure tree';

the functional failure matrix and the content of the structure tree are always synchronous, and a functional network is generated by utilizing the upper and lower transmission relations among the functions of the functional failure matrix to identify and associate;

identifying and correlating failure contents on the basis of the identified functional association to generate a failure network;

completing risk analysis and optimization according to the function and failure association;

and outputting the DFMEA result based on the function and failure correlation.

2. A method of FMEA analysis to effect functional and failure correlation as in claim 1, wherein: also comprises the following steps:

after the DFMEA result based on the function and failure correlation is output, the information is transmitted to the PFMEA.

3. An FMEA analysis device for realizing function and failure correlation is characterized by comprising the following program modules:

the input module is used for inputting superior requirements and defining the analysis range and purpose;

the function identification module is used for identifying and correlating the upper and lower level transmission relations among functions by utilizing the function failure matrix to generate a functional network;

4. A FMEA analysis device implementing function and failure correlation as claimed in claim 3, further comprising:

a transfer module that transfers information to the PFMEA upon outputting the DFMEA result based on the functional and failure correlation.