FMEA and FTA data interaction method and device, medium and product
By building the initial failure tree for logical gate connection in FMEA and FTA analysis, the analysis inconsistency and repetition problems are solved, and more efficient failure analysis is achieved.
Patent Information
- Application Number
- CN202510398593.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-07-18
AI Technical Summary
In the prior art, the lack of association between FMEA and FTA analysis leads to inconsistent descriptions and repetitive work, resulting in inefficient failure analysis.
By taking the underlying events in the FMEA's failure network as the basic events for FTA analysis, and using logical gate connections to build an initial failure tree, the data interaction between FMEA and FTA is realized, and qualitative and quantitative analysis is performed.
It improves the efficiency of failure analysis, reduces repetitive work, and improves the accuracy and consistency of the analysis.
Smart Images
Figure CN120337534A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of failure analysis, and particularly to a method, device, medium and product for FMEA and FTA data interaction. Background Art
[0002] FTA (Fault Tree Analysis) analysis is carried out from top to bottom, and FMEA is carried out from bottom to top. The two complement each other. However, in specific practice, there is a lack of association between the two. On the one hand, it leads to inconsistencies in the description of faults between the two; on the other hand, there are many repetitions between the two, resulting in repetitive work, and thus low efficiency of failure analysis. Summary of the Invention
[0003] The purpose of this application is to provide a method, device, medium and product for FMEA and FTA data interaction, which can improve the efficiency of failure analysis.
[0004] To achieve the above purpose, this application provides the following solutions:
[0005] In the first aspect, this application provides a method for FMEA and FTA data interaction, and the FMEA and FTA data interaction method includes:
[0006] Conduct FMEA analysis on the product to be analyzed to determine the failure network of FMEA;
[0007] Use the bottom-layer events in the failure network as the basic events for FTA analysis, and connect the upper and lower-level events in the failure network with logic gates to sequentially construct the initial fault tree for FTA analysis;
[0008] Conduct qualitative and quantitative analysis of the product to be analyzed according to the initial fault tree and the failure rates of the basic events.
[0009] Optionally, the step of using the bottom-layer events in the failure network as the basic events for FTA analysis, connecting the upper and lower-level events in the failure network with logic gates, and sequentially constructing the initial fault tree for FTA analysis specifically includes:
[0010] Determine the top event of the initial fault tree according to the top event in the failure network;
[0011] Determine the intermediate events and transfer events in turn according to the top event and the upper and lower-level events in the failure network;
[0012] Determine the basic events of the initial fault tree according to the bottom-layer events in the failure network;
[0013] Connect the top event, intermediate events, transfer events and basic events with the corresponding logic gates between the upper and lower-level events in the failure network to obtain the initial fault tree for FTA analysis.
[0014] Optionally, taking the bottom - layer events in the failure network as the basic events for FTA analysis, connecting the upper - level and lower - level events in the failure network with logic gates, and successively constructing the initial fault tree for FTA analysis, the following steps are further included:
[0015] Simplify the initial fault tree using the logical rules of logical algebra.
[0016] Optionally, after simplifying the initial fault tree using the logical rules of logical algebra, the following steps are further included:
[0017] Determine the basic event list based on the simplified initial fault tree and the failure rates of the basic events.
[0018] Optionally, the qualitative and quantitative analysis of the product to be analyzed based on the initial fault tree and the failure rates of the basic events specifically includes:
[0019] According to the structure of the initial fault tree, using the downward method, starting from the top event, search downward level by level until all are replaced with basic events, obtaining multiple cut sets;
[0020] Compare the obtained cut sets pairwise to determine all the minimal cut sets of the initial fault tree;
[0021] Determine the occurrence probability and importance degree of the top event based on the initial fault tree, the failure rates of the basic events, time parameters, and minimal cut sets; the importance degree includes: structure importance degree, relative importance degree, probability importance degree, and critical importance degree.
[0022] Optionally, after the qualitative and quantitative analysis of the product to be analyzed based on the initial fault tree and the failure rates of the basic events, the following steps are further included:
[0023] Obtain the FTA qualitative report and FTA quantitative report according to the qualitative and quantitative analysis structure of the product to be analyzed; the FTA qualitative report includes: minimal cut sets, structure importance degree and corresponding bar charts, relative importance degree and corresponding bar charts; the FTA quantitative report includes: top - event un - reliability, probability importance degree and corresponding bar charts, critical importance degree and corresponding bar charts.
[0024] Optionally, after the qualitative and quantitative analysis of the product to be analyzed based on the initial fault tree and the failure rates of the basic events, the following steps are further included:
[0025] Determine the measures corresponding to each event in the initial fault tree; the measures are preventive measures, detection measures, and response measures obtained from the measure library or directly newly created measures; the content of the measures includes: measure type, measure description, technical standard, technical effectiveness, responsible person, target date, completion date, verifier, verification attachment, remarks, status, and operation.
[0026] In a second aspect, a computer device provided by the present application includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the FMEA and FTA data interaction method described above.
[0027] In a third aspect, a computer-readable storage medium provided by the present application has a computer program stored thereon, and when the computer program is executed by a processor, it implements the FMEA and FTA data interaction method described above.
[0028] In a fourth aspect, a computer program product provided by the present application includes a computer program, and when the computer program is executed by a processor, it implements the FMEA and FTA data interaction method described above.
[0029] According to the specific embodiments provided by the present application, the following technical effects are disclosed:
[0030] The present application provides an FMEA and FTA data interaction method, device, medium, and product. By using the underlying events in the failure network as the basic events for FTA analysis, and connecting the upper and lower level events in the failure network with logic gates to sequentially construct the initial fault tree for FTA analysis, that is, associating the failure network of FMEA with the initial fault tree of FTA analysis, thereby realizing the interaction between FMEA analysis and FTA analysis, and applying FMEA analysis to FTA analysis, improving the efficiency of failure analysis. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.
[0032] Figure 1 It is a schematic flowchart of an FMEA and FTA data interaction method provided by an embodiment of the present application;
[0033] Figure 2 It is a schematic diagram of the downward method. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.
[0035] To make the above objects, features, and advantages of the present application more apparent and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0036] In an exemplary embodiment, as Figure 1 shown, a method for FMEA and FTA data interaction is provided. This method is executed by a computer device, specifically, it can be executed alone by a computer device such as a terminal or a server, or jointly executed by a terminal and a server. In the embodiments of the present application, this method includes the following S101 to S103. Wherein:
[0037] S101, perform FMEA analysis on the product to be analyzed to determine the failure network of FMEA;
[0038] S102, use the bottom-layer events in the failure network as the basic events for FTA analysis, connect the upper and lower-level events in the failure network with logic gates, and sequentially construct the initial fault tree for FTA analysis; the logic gates support AND gates and OR gates. Each event includes a corresponding event number, event description, logic gate, failure category, and the failure rate and time parameters of the basic event;
[0039] S102 specifically includes:
[0040] Determine the top event of the initial fault tree according to the top event in the failure network;
[0041] Determine the intermediate events and transfer events in sequence according to the top event and the upper and lower-level events in the failure network;
[0042] Determine the basic events of the initial fault tree according to the bottom-layer events in the failure network; display the intermediate events, basic events, and transfer events in different graphics for distinction;
[0043] Connect the top event, intermediate events, transfer events, and basic events with the corresponding logic gates between the upper and lower-level events in the failure network to obtain the initial fault tree for FTA analysis.
[0044] After obtaining the initial fault tree for FTA analysis, corresponding initial fault tree for FTA analysis can also be imported on the top event or intermediate event;
[0045] After S102, it further includes:
[0046] S201, simplify the initial fault tree using the logical rules of logical algebra.
[0047] The processing logic of the logical method of logical algebra is shown in Table 1:
[0048] Table 1
[0049]
[0050] S202. Determine the basic event list according to the simplified initial fault tree and the failure rates of basic events.
[0051] The basic event list lists the basic event list in the initial fault tree, as well as the event description, failure rate, and source of each basic event; in the list, the merging of the same basic events is supported, and the merged event content and number are displayed at the corresponding basic event position in the fault tree.
[0052] S103. Perform qualitative and quantitative analysis on the product to be analyzed according to the initial fault tree and the failure rates of basic events.
[0053] S103 specifically includes:
[0054] S301. According to the structure of the initial fault tree, adopt the downward method, start from the top event, and search downward level by level until all are replaced by basic events, obtaining multiple cut sets;
[0055] As Figure 2 shown, apply the downward method, according to the structure of the initial fault tree, start from the top event, and search downward level by level. Specifically:
[0056] When encountering an AND gate, arrange its input events on the same line (only increasing the order of the cut set, not the number of cut sets);
[0057] When encountering an OR gate, arrange its input events in separate lines (only increasing the number of cut sets, not the order of the cut set);
[0058] In this way, until all are replaced by bottom events, the obtained cut sets.
[0059] S302. Compare the obtained cut sets pairwise to determine all the minimal cut sets of the initial fault tree;
[0060] S303. Determine the top event occurrence probability and importance according to the initial fault tree, the failure rates of basic events, time parameters, and minimal cut sets; the importance includes: structural importance, relative importance, probability importance, and critical importance.
[0061] The failure occurrence rate F(t) of each basic event: F(t) = 1 - e -λt ; where, λ is the failure rate and t is the time parameter;
[0062] Top event failure occurrence probability:
[0063]
[0064] where, n is the number of minimal cut sets, m is the current cut set order, Q i is the failure occurrence rate (unreliability) of the minimal cut set;
[0065] For example, the minimal cut sets are Q1: (x1), Q2: (x2, x4), Q3: (x3, x5); Q1 = F1(t); failure probability
[0066] Q2 = F2(t)F4(t); Q3 = F3(t)F5(t);
[0067] F(t) = 1 - (1 - Q1)(1 - Q2)(1 - Q3) = 1 - (1 - F1(t))(1 - F2(t)F4(t))(1 - F3(t)F5(t));
[0068] The probability importance is the degree of change in the system unreliability caused by the change in the unreliability of the i-th component; the probability importance is:
[0069] where Δg i (t) is the probability importance, F i (t) is the unreliability of the component, and Fs(t) is the system unreliability;
[0070] Taking the above results as an example, the occurrence probability of the top event failure:
[0071] F(t) = 1 - (1 - F1(t))(1 - F2(t)F4(t))(1 - F3(t)F5(t));
[0072] The probability importance of x1:
[0073] The probability importance of x2:
[0074] The probability importance of x3:
[0075] The probability importance of x4:
[0076] The probability importance of x5:
[0077] The critical importance is the rate of change of the system failure probability caused by the change in the failure rate of the i-th component. It reflects the property that it is more difficult to improve a relatively reliable component than a less reliable component. Its expression is:
[0078]
[0079] where is the critical importance, F i (t)·Δg i(t) The probability that the failure of the i-th component causes the system failure. The larger this value is, the greater the probability that the i-th component causes the system failure. Therefore, when overhauling the system, the components with high critical importance should be checked first.
[0080] The structure importance is the importance degree of the component in the system and has nothing to do with the failure probability of the component itself. Its expression is:
[0081]
[0082]
[0083] Among them, is the structure importance of the i-th component, is the change of the system structure function when the i-th component in the system changes from the normal state (0) to the failure state (1) and the states of other components remain unchanged. When the fault tree is relatively large and the number of basic events is relatively large, to simplify the calculation complexity, the structure importance can be calculated using the probability importance formula, and the probability values of the basic events are input according to 0.5:
[0084] F1(t)=0.5, F2(t)=0.5, F3(t)=0.5, F4(t)=0.5, F5(t)=0.5 are substituted into the following formula:
[0085] The structure importance of x1:
[0086] The structure importance of x2:
[0087] The structure importance of x3:
[0088] The structure importance of x4:
[0089] The structure importance of x5:
[0090] After S103, it also includes:
[0091] According to the qualitative and quantitative analysis structures of the product to be analyzed, an FTA qualitative report and an FTA quantitative report are obtained; the FTA qualitative report includes: the minimum cut set, the structure importance and the corresponding histogram, the relative importance and the corresponding histogram; the FTA quantitative report includes: the unreliability of the top event, the probability importance and the corresponding histogram, the critical importance and the corresponding histogram.
[0092] Determine the measures corresponding to each event in the initial fault tree; the measures are preventive measures, detection measures, and response measures obtained from the measure library or directly newly created measures; the content of the measures includes: measure type, measure description, technical standard, technical effectiveness, responsible person, target date, completion date, verifier, verification attachment, remarks, status, and operation.
[0093] In an exemplary embodiment, a computer device is provided. The computer device can be a server or a terminal. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements an FMEA and FTA data interaction method.
[0094] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, which when executed by a processor implements the steps in the above method embodiments.
[0095] In an exemplary embodiment, a computer program product is provided, including a computer program, which when executed by a processor implements the steps in the above method embodiments.
[0096] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.
[0097] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tapes, floppy disks, flash memories, optical memories, high-density embedded non-volatile memories, resistive random access memories (ReRAM), magnetoresistive random access memories (MRAM), ferroelectric random access memories (FRAM), phase change memories (PCM), graphene memories, etc. Volatile memories can include random access memory (RAM) or external cache memories, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.
[0098] The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logics, data processing logics based on quantum computing, etc., without limitation.
[0099] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0100] In this article, specific examples are used to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.
Claims
1. A method for data interaction between FMEA and FTA, characterized in that, The FMEA and FTA data interaction method includes: Conduct FMEA analysis on the product to be analyzed to determine the failure network of FMEA; Take the bottom-level events in the failure network as the basic events for FTA analysis, connect the upper and lower-level events in the failure network with logic gates, and sequentially construct the initial fault tree for FTA analysis; Conduct qualitative and quantitative analysis of the product to be analyzed based on the initial fault tree and the failure rates of the basic events.
2. The FMEA and FTA data interaction method according to claim 1, characterized in that The step of taking the bottom-level events in the failure network as the basic events for FTA analysis, connecting the upper and lower-level events in the failure network with logic gates, and sequentially constructing the initial fault tree for FTA analysis specifically includes: Determine the top event of the initial fault tree according to the top event in the failure network; Sequentially determine the intermediate events and transfer events according to the top event and the upper and lower-level events in the failure network; Determine the basic events of the initial fault tree according to the bottom-level events in the failure network; Between the top event, intermediate events, transfer events, and basic events, connect them with the corresponding logic gates between the upper and lower-level events in the failure network to obtain the initial fault tree for FTA analysis.
3. The FMEA and FTA data interaction method according to claim 1, wherein After the step of taking the bottom-level events in the failure network as the basic events for FTA analysis, connecting the upper and lower-level events in the failure network with logic gates, and sequentially constructing the initial fault tree for FTA analysis, it further includes: Simplify the initial fault tree using the logical rules of logical algebra.
4. The FMEA and FTA data interaction method according to claim 3, wherein After the step of simplifying the initial fault tree using the logical rules of logical algebra, it further includes: Determine the basic event list according to the simplified initial fault tree and the failure rates of the basic events.
5. The FMEA and FTA data interaction method according to claim 1, wherein The step of conducting qualitative and quantitative analysis of the product to be analyzed based on the initial fault tree and the failure rates of the basic events specifically includes: According to the structure of the initial fault tree, use the downward method to start from the top event and search downward level by level until all are replaced with basic events to obtain multiple cut sets; Compare the obtained cut sets pairwise to determine all the minimal cut sets of the initial fault tree; Determine the occurrence probability and importance of the top event according to the initial fault tree, the failure rates of the basic events, time parameters, and minimal cut sets; the importance includes: structural importance, relative importance, probability importance, and critical importance.
6. The FMEA and FTA data interaction method according to claim 5, wherein, After the step of conducting qualitative and quantitative analysis of the product to be analyzed based on the initial fault tree and the failure rates of the basic events, it further includes: Obtain the FTA qualitative report and FTA quantitative report according to the qualitative and quantitative analysis structure of the product to be analyzed; the FTA qualitative report includes: minimal cut sets, structural importance and corresponding bar charts, relative importance and corresponding bar charts; the FTA quantitative report includes: top event unavailability, probability importance and corresponding bar charts, critical importance and corresponding bar charts.
7. The FMEA and FTA data interaction method according to claim 1, wherein After the step of conducting qualitative and quantitative analysis of the product to be analyzed based on the initial fault tree and the failure rates of the basic events, it further includes: Determine the measures corresponding to each event in the initial fault tree; the measures are preventive measures, detection measures, and response measures obtained from the measure library or directly newly created measures; the content of the measures includes: measure type, measure description, technical standard, technical effectiveness, responsible person, target date, completion date, verifier, verification attachment, remarks, status, and operation.
8. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the FMEA and FTA data interaction method according to any one of claims 1-7.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the FMEA and FTA data interaction method according to any one of claims 1-7.
10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the FMEA and FTA data interaction method according to any one of claims 1-7.