Interface and function-based product FMEA analysis system and method
Through the product FMEA analysis system based on interfaces and functions, the product analysis tree is constructed, which solves the analysis difficulties of traditional FMEA methods without being clear about the product structure, and realizes effective analysis and risk assessment in the case of unclear product structure.
Patent Information
- Application Number
- CN202510398170.8
- 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
The existing product design failure mode and consequence analysis (FMEA) methods are mainly based on product structure and cannot be effectively applied to situations where the specific product structure is unclear.
Using a product FMEA analysis system based on interfaces and functions, the requirements list determination module, product function determination module, product structure determination module and function expansion module are used to build a product analysis tree and conduct FMEA analysis, and output FMEA reports.
It realizes effective FMEA analysis of product designs that are unclear about the product structure, overcomes the limitations of traditional methods, provides a functional list, a structural list and an interface list, and supports product risk assessment and optimization.
Smart Images
Figure CN120337530A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of FMEA analysis, and particularly to a product FMEA analysis system and method based on interfaces and functions. Background Art
[0002] The current Failure Mode and Effects Analysis (FMEA) of product design is based on the FMEA analysis of product structure. For products with unclear specific product structures, traditional FMEA analysis is not applicable. Summary of the Invention
[0003] The purpose of this application is to provide a product FMEA analysis system and method based on interfaces and functions, which realizes the FMEA analysis of product designs with unclear product structures.
[0004] To achieve the above purpose, this application provides the following solutions:
[0005] In the first aspect, this application provides a product FMEA analysis system based on interfaces and functions, including:
[0006] A requirements list determination module, configured to determine a requirements list of a target product according to the connection relationships between the target product and each preset external object; the requirements list of the target product includes the interfaces between the target product and each preset external object;
[0007] A product function determination module, configured to determine a function list and a function block diagram of the target product based on the requirements list of the target product;
[0008] A product structure determination module, configured to determine the structure corresponding to each function in the function list, and if the structure corresponding to a function includes sub-structures, determine the sub-structures of the structure. Each structure and each sub-structure form a first product analysis tree;
[0009] A function expansion module, configured to match the sub-structures in the first product analysis tree with corresponding sub-functions to obtain a second product analysis tree;
[0010] An FMEA analysis module, configured to perform FMEA analysis on each function in the second product analysis tree and output an FMEA report of the target product.
[0011] Optionally, the product function determination module includes a function conversion unit and a function decomposition unit;
[0012] The function conversion unit is configured to convert the interfaces connecting the target product and each preset external object into internal functions or internal interface functions of the product;
[0013] The function decomposition unit is used to decompose the internal functions of each product or the internal interface functions, and the decomposed functions constitute the function list.
[0014] Optionally, in terms of decomposing the internal functions of each product or the internal interface functions, and the decomposed functions constituting the function list, the function decomposition unit is specifically used for:
[0015] Decompose the internal functions of the product or the internal interface functions into multiple sub-functions, determine the input-output relationships between the sub-functions by means of connection lines, and output a function block diagram and a function list according to the input-output relationships between the sub-functions.
[0016] Optionally, the product function determination module is further used to perform P-diagram analysis on each function in the function list to determine the function characteristics of each function.
[0017] Optionally, the product function determination module is further used to output a function characteristic list.
[0018] Optionally, the product structure determination module is further used to add the function characteristics of each function to the second product analysis tree according to the function characteristic list.
[0019] Optionally, the product structure determination module is further used to draw external interfaces and internal interfaces and output an interface list; the external interface is a connection interface between a preset external object and a sub-structure, and the internal interface is a connection interface between sub-structures.
[0020] Optionally, the target product includes a ground wire state detection device.
[0021] Optionally, the preset external objects include users, 4G networks, GNSS satellites, cable lines, parameter configuration terminals, and ground wire head charging devices.
[0022] In a second aspect, the present application provides a product FMEA analysis method based on interfaces and functions. The product FMEA analysis method based on interfaces and functions applies the product FMEA analysis system based on interfaces and functions. The product FMEA analysis method based on interfaces and functions includes:
[0023] Determine a requirements list of the target product according to the connection relationship between the target product and each preset external object; the requirements list of the target product includes the interfaces between the target product and each preset external object;
[0024] Determine the function list and function block diagram of the target product based on the requirements list of the target product;
[0025] Determine the structure corresponding to each function in the function list. If the structure corresponding to a function includes sub-structures, determine the sub-structures of this structure. Each structure and each sub-structure constitute the first product analysis tree;
[0026] Match the sub-structures in the first product analysis tree with the corresponding sub-functions to obtain the second product analysis tree;
[0027] Perform FMEA analysis on each function in the second product analysis tree and output the FMEA report of the target product.
[0028] According to the specific embodiments provided in this application, the following technical effects are disclosed in this application:
[0029] This application provides a product FMEA analysis system and method based on interfaces and functions. The function list and function block diagram are determined based on the requirements list of the target product. Determine the structure corresponding to each function in the function list. If the structure corresponding to a function includes sub-structures, determine the sub-structures of this structure. Each structure and each sub-structure constitute the first product analysis tree. Perform function matching on the first product analysis tree to obtain the second product analysis tree. Realize the FMEA analysis of the target product according to the second product analysis tree, overcoming the problem that product FMEA analysis cannot be performed when the product structure is not clear. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] 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. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0031] Figure 1 Schematic structural diagram of a product FMEA analysis system based on interfaces and functions provided by an embodiment of the present application;
[0032] Figure 2 Schematic business process diagram of an FMEA analysis system based on interfaces and functions provided by an embodiment of the present application;
[0033] Figure 3 Schematic diagram of the connection relationship between the target product and each preset external object provided by an embodiment of the present application;
[0034] Figure 4 Schematic diagram of the product functions provided by an embodiment of the present application;
[0035] Figure 5 Schematic diagram of the product functions and internal interface functions provided by an embodiment of the present application;
[0036] Figure 6 Function relationship diagram provided by an embodiment of the present application;
[0037] Figure 7 Schematic diagram of a functional branch in the first product analysis tree provided by an embodiment of the present application;
[0038] Figure 8 Schematic diagram of the second product analysis tree provided by an embodiment of the present application;
[0039] Figure 9 Schematic diagram of the structural block diagram analysis interface provided by an embodiment of the present application;
[0040] Figure 10 Schematic diagram of the process of a product FMEA analysis method based on interfaces and functions provided by another embodiment of the present application. Specific implementation manners
[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0042] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.
[0043] The present application provides a product FMEA analysis system based on interfaces and functions, as Figure 1 shown. A product FMEA analysis system based on interfaces and functions includes the following modules.
[0044] A requirements list determination module, configured to determine a requirements list of the target product according to the connection relationship between the target product and each preset external object; the requirements list of the target product includes the interfaces between the target product and each preset external object.
[0045] A product function determination module, configured to determine a function list and a function block diagram of the target product based on the requirements list of the target product.
[0046] A product structure determination module, configured to determine the structure corresponding to each function in the function list, and if the structure corresponding to the function includes sub-structures, determine the sub-structures of the structure. Each structure and each sub-structure form a first product analysis tree.
[0047] The structure corresponding to each function refers to the structure that implements the function. Some structures also include sub-structures.
[0048] A function expansion module, which is used to match the sub-structures in the first product analysis tree with corresponding sub-functions to obtain a second product analysis tree.
[0049] An FMEA analysis module, which is used to perform FMEA analysis on each function in the second product analysis tree and output the FMEA report of the target product.
[0050] Based on the requirement list of the target product, this application determines the function list and function block diagram, then determines the product sub-structures and the connection relationships between the sub-structures according to the function list and function block diagram, generates the first product analysis tree, performs function matching on the first product analysis tree to obtain the second product analysis tree, and realizes the FMEA analysis of the target product according to the second product analysis tree, overcoming the problem that product FMEA analysis cannot be performed when the product structure is not clear.
[0051] This application generally adopts the concept of product hierarchical design and uses a structural FMEA tool for design risk assessment. As shown in Table 1, it outputs the function requirements of the product, the software and hardware structure list, and the internal and external interface list.
[0052] Table 1 Overall design idea table
[0053]
[0054] The business process of a product FMEA analysis system based on interfaces and functions in this application is as Figure 2 shown. According to the external interface or interfaces, the functions of the product or system device are identified (black box block diagram), the function modules and the input-output relationships between the functions are divided (multi-layer gray box block diagram), that is, the superior-subordinate relationships between the functions are determined; the lower-level software and hardware modules are identified based on the function modules and function block diagrams (white box block diagram), and finally FMEA analysis is performed.
[0055] This application regards the target product as a black box, identifies the external objects related to the black box, and presets that the external objects include users, input-related parties, output-related parties, working environment, internal customers, and legal and regulatory requirements, etc. Among them, users include direct users, indirect users, and end users, and internal customers include relevant parties such as manufacturing, transportation, and maintenance. The requirement list determination module is used to define the relevant requirements of the external objects for the black box and draw the black box block diagram.
[0056] This application takes the focused product as the analysis object, identifies the external objects related to the object. Defines the relevant requirements of the external objects for the black box, draws the requirement block diagram (R diagram). Outputs the "Customer Requirement List" based on the R diagram.
[0057] External objects include users, relevant parties providing inputs, relevant parties receiving outputs, the working environment, internal customers, legal and regulatory requirements, etc. Users include direct users, indirect users, and end-users; internal customers include relevant parties such as manufacturing, transportation, and maintenance.
[0058] The product function determination module is used for product function definition, specifically including: adding primary product functions inside the black box, decomposing a certain primary product function into multiple secondary product functions if necessary, defining the input and output relationships between internal functions and with external objects, drawing a gray box block diagram, and outputting a function block diagram and a function list based on the gray box block diagram.
[0059] The product function determination module includes a product function determination unit, and the product function determination unit is used for:
[0060] 1) Identifying the typical operating scenarios of the analysis object, and the operating scenario is also called the mission profile.
[0061] 2) Adding primary functions under each operating scenario (the same function may run through multiple operating scenarios).
[0062] 3) Decomposing a certain primary function into multiple secondary product functions if necessary.
[0063] 4) Decomposing a certain secondary function into multiple tertiary product functions if necessary (in principle, it can continue to be decomposed downward, but it is not recommended to exceed three levels).
[0064] 5) Defining the input and output relationships between internal functions and with external objects, and drawing a function block diagram (F diagram).
[0065] 6) Scoring the frequency F of each function used.
[0066] 7) If necessary, conduct a P diagram analysis on important functions, and output the "Characteristic List" (characteristics are derived from outputs and control factors) and the "Control Measure List" of this function.
[0067] 8) If necessary, a timing diagram (T diagram) can be used to conduct a dynamic analysis of functions, and based on the timing definition, automatically generate the trigger conditions and time requirements for relevant inputs and outputs.
[0068] 9) Output the "Function Flow Chart", "Function Structure Tree" (reflecting information such as function hierarchy, series / parallel form, input / output, characteristics, trigger conditions, running time, etc.), and "Function List" based on the F diagram, P diagram, and T diagram.
[0069] 10) Subsequently, a detailed analysis can be focused on a certain function, and finally, the "FMEA Report" of this function can be output.
[0070] Such as Figure 3As shown, the target product is a ground wire status detection device, and the preset external objects include users, 4G networks, GNSS satellites, ground wire head charging devices, parameter configuration APPs, and cable lines. Figure 3 The connection relationships between the preset external objects and the target product are given in Figure 3 . By determining the functions corresponding to the connection relationships, the functional relationships between the preset external objects and the target product are obtained, as Figure 4 shown.
[0071] A product FMEA analysis system based on interfaces and functions in this application can convert functions into product structures according to the black box - gray box - white box analysis idea, and can realize customer requirement analysis, product function definition, product architecture design, function decomposition, failure analysis, risk analysis, optimization, and result documentation, and complete the FMEA analysis of the target product.
[0072] Generate a black box block diagram according to the external interface definition, and output an external interface list according to the black box block diagram, as shown in Table 2.
[0073] Table 2 External Interface List
[0074]
[0075] The product function determination module includes a function conversion unit and a function decomposition unit. In this application, based on the black box block diagram, internal functions (internal function boxes) are added through the operation interface, and the external interface requirements (function requirements) are converted into product internal functions or internal interface functions, as Figure 5 shown. Based on the external objects of the black box block diagram in this application, and the defined sub - structures, external and internal interface definitions are carried out, and a white box block diagram is drawn. Based on the white box block diagram, an interface list and an interface function list are output, and a product function matrix is output based on the gray box block diagram and the white box block diagram.
[0076] The function conversion unit is used to convert the interfaces connecting the target product and the preset external objects into product internal functions or internal interface functions.
[0077] The function decomposition unit is used to decompose each of the product internal functions or the internal interface functions, and the decomposed functions constitute the function list. The function list includes a product function list and an internal interface function list. The product function list is shown in Table 3, and the internal interface function list is shown in Table 4.
[0078] Table 3 Product Function List
[0079] Serial Number Product Function Remarks 1 Motor Insulation Detection Function 2 Motor Operating Status Monitoring 3 Human-Machine Interaction Management Function 4 Insulation Monitoring Alarm Management 5 Leakage Monitoring Function 6 Remote Communication …
[0080] Table 4 Internal Interface Function List
[0081] Serial Number Internal Function / Characteristic Remarks 1 Motor Live Detection 2 Line Live Monitoring Function 3 Insulation Monitoring Alarm 4 Residual Voltage Release Function 5 Detect Normally Closed Output 6 Detect Normally Open Output 7 Remote Insulation Resistance Detection …
[0082] The product function determination module is also used to perform P-diagram (Parameter Diagram) analysis on each function in the function list to determine the functional characteristics of each function and output a characteristics list. The characteristics are derived from the inputs, outputs, and control factors of the functions.
[0083] In terms of disassembling each of the internal functions of the product or the internal interface functions, and the functions after disassembly constituting the function list, the function disassembly unit is specifically used for: disassembling the internal functions of the product or the internal interface functions into multiple sub-functions, determining the input-output relationships between the sub-functions by means of connection lines, and outputting a function block diagram and a function list according to the input-output relationships between the sub-functions.
[0084] The product structure determination module focuses on a certain function to define the structure and sub-structures. The structure is reusable. One function corresponds to at least one structure, and one structure can correspond to multiple functions. The structure can be split or merged. After all functions have defined the structure and sub-structures, a first product structure tree is automatically output; based on the external objects of the F block diagram and the defined sub-structures, external and internal interface definitions are carried out, and a structure block diagram is drawn; based on the B diagram, an "Interface List" and an "Interface Function List" are output; based on the F diagram and the B diagram, a "Product Function Matrix" is output; the structure tree has two views: a function structure tree and a product structure tree, and relevant information can be viewed by focusing on a certain function or product. Mutual conversion is supported between the function structure tree and the product structure tree.
[0085] The product function determination module is also used to output a function characteristics list.
[0086] The product structure determination module is also used to add the functional characteristics of each function to the second product analysis tree according to the function characteristics list.
[0087] The product structure determination module is also used to draw external interfaces and internal interfaces and output an interface list; the external interface is a connection interface between a preset external object and a sub-structure, and the internal interface is a connection interface between sub-structures.
[0088] The function expansion module defines the functions of the sub-structures, performs gray-box block diagram analysis on the sub-structures, uses the product function matrix to define the functional relationships between the upper and lower levels, and outputs a function network and an event tree.
[0089] Each sub-function has one or more failure modes, and each failure mode has a corresponding failure consequence and an S value. The S value of this function should take the maximum S value.
[0090] Each sub-function has a usage frequency and also a corresponding F value.
[0091] Each sub - function has a controllability C, which is determined by the control measures adopted by this function and its subordinate functions.
[0092] The S value follows the rule of top - down transmission.
[0093] The F value and C value follow the rule of bottom - up transmission. The F value takes the maximum F value among this function and its subordinate sub - functions.
[0094] The interface list defines the input - output relationships between internal structures, as well as between internal structures and external structures.
[0095] What is transmitted between interfaces is data or signals. After defining the interfaces through white - box block diagrams, these transmitted data or signals can be directly defined to form an interface function list.
[0096] For example: After defining the interface between A and B, if A transmits parameter c to B, then a functional node called "output" will be automatically generated under A, with a characteristic node called "parameter (c)". There will be a virtual sub - structure called "input" after B, and there is a characteristic node called "parameter (c)" under this node; all output parameters will be aggregated under the output functional node, and all input parameters will be aggregated under the virtual structure node of the input.
[0097] Both functions and structures can be split and combined. The structure is essentially a combination of functions, and the combination of one or more functions forms a structure. Combinations of functions at different levels form structure names at different levels, such as systems, subsystems, modules, components, functions, etc. The structure is habitually a tree - shaped structure. A structure can have multiple sub - structures, and a sub - structure has only one parent structure.
[0098] Functions may be in a network structure. A superior function may be associated with multiple subordinate functions, and a subordinate function may also be associated with multiple superior functions.
[0099] When a structure is converted into a function, it is equivalent to converting it into a functional point at the superior level.
[0100] When a function is converted into a structure, it is equivalent to converting it into a structural point at the subordinate level.
[0101] The target product includes a ground - wire status detection device.
[0102] The preset external objects include users, 4G networks, GNSS satellites, cable lines, parameter configuration terminals, and ground - wire head charging devices.
[0103] In an exemplary embodiment, Figure 5The medium function A is disassembled into line live detection function and motor live detection. The motor insulation detection function is disassembled into detection locking function, residual voltage release function, insulation detection function and insulation monitoring alarm. The function disassembly specifically includes: 1) Right-click the mouse to edit the function description and modify it to a more detailed function description; 2) Right-click the mouse in the function block where a sub-function needs to be added and add the sub-function, and the sub-function is the function in the function list; 3) Connect the transfer relationship between sub-functions by wiring; Output the function list and function relationship diagram, and automatically obtain the function in the first structure tree. The function relationship diagram is as Figure 6 shown, and the first structure tree is as Figure 7 shown.
[0104] In the first structure tree, focus on any one function, add the software and hardware structures related to this function, and adjust the functions under the root node product to the corresponding software or hardware structures to generate the second product analysis tree, structure block diagram analysis interface and software and hardware list. The second product analysis tree is as Figure 8 shown, and the structure block diagram analysis interface is as Figure 9 shown.
[0105] The software and hardware list is shown in Table 5, and the software and hardware function list is shown in Table 6.
[0106] Table 5 Software and Hardware List
[0107] Serial Number Hardware / Hardware Name Remarks 1 Input Module (H) 2 Input Module (S) 3 Residual Voltage Release Control Module (H) 4 Residual Voltage Release Control Module (S) 5 Subordinate Product 1 6 Subordinate Product 2 …
[0108] Table 6 Software and Hardware Function List
[0109] Serial Number Hardware / Hardware Function 1 Input Module (H) Motor Operating Status Monitoring 2 Input Module (S) Motor Operating Status Monitoring 3 Residual Voltage Release Control Module (H) Residual Voltage Release Function 4 Residual Voltage Release Control Module (S) Residual Voltage Release Function 5 Subordinate Product 1 Motor Live Detection 6 Subordinate Product 2 Line Live Monitoring …
[0110] The FMEA report includes: sub-structure name, sub-structure function, sub-structure characteristics, failure consequences, failure modes, failure causes, preventive measures, detection measures and measure priority (AP) level.
[0111] Based on the same inventive concept, the embodiment of the present application also provides a method for analyzing product FMEA based on interfaces and functions for implementing the above-mentioned product FMEA analysis system based on interfaces and functions. The implementation solutions provided by this device to solve problems are similar to the implementation solutions described in the above method. Therefore, the specific limitations in one or more embodiments of the product FMEA analysis device based on interfaces and functions provided below can refer to the limitations on the method for analyzing product FMEA based on interfaces and functions in the above text, and will not be repeated here.
[0112] In an exemplary embodiment, as Figure 10As shown, a product FMEA analysis method based on interfaces and functions is provided. The product FMEA analysis method based on interfaces and functions applies the product FMEA analysis system based on interfaces and functions. The product FMEA analysis method based on interfaces and functions includes:
[0113] Step 101: Determine the requirement list of the target product according to the connection relationship between the target product and each preset external object; the requirement list of the target product includes the interfaces between the target product and each preset external object.
[0114] Step 102: Determine the function list and function block diagram of the target product based on the requirement list of the target product.
[0115] Step 103: Determine the structure corresponding to each function in the function list. If the structure corresponding to the function includes sub-structures, determine the sub-structures of the structure. Each structure and each sub-structure form the first product analysis tree.
[0116] Step 104: Match the sub-structures in the first product analysis tree with the corresponding sub-functions to obtain the second product analysis tree.
[0117] Step 105: Conduct FMEA analysis on each function in the second product analysis tree and output the FMEA report of the target product.
[0118] 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 recorded in this specification.
[0119] Specific examples are used in this article to elaborate on the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.
Claims
1. A product FMEA analysis system based on interfaces and functions, characterized in that, The product FMEA analysis system based on interfaces and functions includes: A requirements list determination module, configured to determine a requirements list of a target product according to the connection relationship between the target product and each preset external object; the requirements list of the target product includes the interfaces between the target product and each preset external object. A product function determination module, configured to determine a function list and a function block diagram of the target product based on the requirements list of the target product. A product structure determination module, configured to determine the structure corresponding to each function in the function list, and if the structure corresponding to a function includes sub-structures, determine the sub-structures of the structure, and the structures and sub-structures form a first product analysis tree. A function expansion module, configured to match sub-functions corresponding to the sub-structures in the first product analysis tree to obtain a second product analysis tree. An FMEA analysis module, configured to perform FMEA analysis on each function in the second product analysis tree and output an FMEA report of the target product.
2. The product FMEA analysis system based on interfaces and functions according to claim 1, characterized in that The product function determination module includes a function conversion unit and a function decomposition unit. The function conversion unit is configured to convert the interfaces connecting the target product and each preset external object into internal product functions or internal interface functions. The function decomposition unit is configured to decompose each of the internal product functions or the internal interface functions, and the decomposed functions form the function list.
3. The product FMEA analysis system based on interfaces and functions according to claim 2, wherein In terms of decomposing each of the internal product functions or the internal interface functions, and the decomposed functions form the function list, the function decomposition unit specifically is configured to: Decompose the internal product function or the internal interface function into multiple sub-functions, determine the input-output relationships between the sub-functions by means of connection lines, and output a function block diagram and a function list according to the input-output relationships between the sub-functions.
4. The product FMEA analysis system based on interfaces and functions according to claim 1, wherein The product function determination module is further configured to perform P-diagram analysis on each function in the function list to determine the function characteristics of each function.
5. The product FMEA analysis system based on interfaces and functions according to claim 4, characterized in that, The product function determination module is further configured to output a function characteristic list.
6. The product FMEA analysis system based on interfaces and functions according to claim 5, characterized in that, The product structure determination module is further configured to add the function characteristics of each function to the second product analysis tree according to the function characteristic list.
7. The product FMEA analysis system based on interfaces and functions according to claim 1, characterized in that The product structure determination module is further configured to draw external interfaces and internal interfaces and output an interface list; the external interface is the connection interface between a preset external object and a sub-structure, and the internal interface is the connection interface between sub-structures.
8. The product FMEA analysis system based on interfaces and functions according to claim 1, characterized in that The target product includes a ground wire state detection device.
9. The product FMEA analysis system based on interfaces and functions according to claim 8, characterized in that, The preset external objects include a user, a 4G network, a GNSS satellite, a cable line, a parameter configuration terminal, and a ground wire head charging device.
10. A product FMEA analysis method based on interfaces and functions, characterized in that, The product FMEA analysis method based on interfaces and functions applies the product FMEA analysis system based on interfaces and functions as claimed in claims 1-9, and the product FMEA analysis method based on interfaces and functions includes: Determining a requirements list of a target product according to the connection relationship between the target product and each preset external object; the requirements list of the target product includes the interfaces between the target product and each preset external object. Determining a function list and a function block diagram of the target product based on the requirements list of the target product. Determine the structure corresponding to each function in the function list. If the structure corresponding to a function includes sub-structures, determine the sub-structures of this structure. Each structure and each sub-structure form a first product analysis tree; Match the sub-structures in the first product analysis tree with the corresponding sub-functions to obtain a second product analysis tree; Perform FMEA analysis on each function in the second product analysis tree and output the FMEA report of the target product.