Off-road vehicle maintainability design evaluation method and device and electronic equipment

Abstract

The invention relates to an off-road vehicle maintainability design evaluation method and device and electronic equipment, and belongs to the technical field of off-road vehicle design, and the method comprises the steps: determining multi-stage evaluation indexes affecting the maintainability of an off-road vehicle according to the structure of the off-road vehicle; obtaining an evaluation score of a last-stage evaluation index in the multiple stages of evaluation indexes; and based on the evaluation score of the last-stage evaluation index, sequentially carrying out weighted summation on the evaluation score of the current-stage evaluation index from the last-stage evaluation index in the multi-stage evaluation indexes to the front to calculate the evaluation score of the previous-stage evaluation index, and finally obtaining a comprehensive evaluation result. According to the method, the multi-level evaluation system is constructed, weighted summation is carried out from bottom to top to gradually calculate the evaluation score of the upper-level evaluation index, a comprehensive and scientific evaluation system is formed, and practical data support and guidance are provided for the maintainability design of the off-road vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of off-road vehicle design, and in particular to an off-road vehicle maintainability design evaluation method, device and electronic equipment. Background Art

[0002] Maintainability design means that when designing a product, the designer should start from the point of view of maintenance, to ensure that once a product fails, the fault can be easily found, and it is easy to disassemble, repair and install, that is, it has high maintainability. As modern off-road vehicles develop towards high mobility, high protection and informatization, the vehicle structure is becoming increasingly complex, and the difficulty of maintenance has increased significantly. Good maintainability design is of great significance for reducing maintenance costs, improving vehicle reliability, preventing failures and responding quickly. Therefore, developing an off-road vehicle maintainability design evaluation method is of great significance for improving the maintainability level of off-road vehicles.

[0003] In the existing technology, GJB 368 "General Requirements for Equipment Maintainability Work" provides a basic framework for equipment maintainability design. However, the maintainability design evaluation for off-road vehicles has problems such as incomplete evaluation content, and a certain degree of arbitrariness in the evaluation content and results, which makes it difficult for the maintainability design evaluation to achieve maximum benefits in practical applications. Summary of the invention

[0004] In view of this, it is necessary to provide an off-road vehicle maintainability design evaluation method, device and electronic equipment to solve the problems existing in the prior art that the evaluation content is not comprehensive enough and the evaluation content and evaluation results are somewhat arbitrary.

[0005] In order to solve the above problems, the present application provides an off-road vehicle maintainability design evaluation method, including: According to the structure of off-road vehicles, determine the multi-level evaluation indexes that affect the maintainability of off-road vehicles; Obtaining the evaluation score of the last level evaluation indicator in the multi-level evaluation indicators; Based on the evaluation score of the final evaluation indicator, the evaluation scores of the current evaluation indicators in the multi-level evaluation indicators are weighted and summed up in sequence from the final evaluation indicator in the multi-level evaluation indicators to calculate the evaluation score of the previous evaluation indicator, and finally a comprehensive evaluation result is obtained.

[0006] In some possible implementations, the multi-level evaluation indicators include first-level evaluation indicators, and the first-level evaluation indicators include maintenance safety, maintenance accessibility, standardization and interchangeability, error prevention and identification marking, reduction of maintenance content and maintenance skills, and human factor engineering.

[0007] In some possible implementations, the multi-level evaluation index also includes secondary evaluation indexes, and the secondary evaluation indexes are the subsystems of the off-road vehicle, including the power system, transmission system, frame system, driving system, braking system, electrical system, body system, information system and other systems.

[0008] In some possible implementations, the multi-level evaluation index further includes a three-level evaluation index, and the three-level evaluation index includes various maintenance items, and the maintenance items are determined by the corresponding subsystem structure.

[0009] In some possible implementations, the evaluation scores of the current level evaluation indicators are weighted and summed to calculate the evaluation scores of the previous level evaluation indicators, including: Combining the analytic network hierarchy process with the entropy weight method, the comprehensive weight of the evaluation score of the current level evaluation index is calculated; Based on the comprehensive weight, the evaluation scores of the current level evaluation indicators are weighted and summed to calculate the evaluation scores of the previous level evaluation indicators.

[0010] In some possible implementations, the network analytic hierarchy process and the entropy weight method are combined to calculate the comprehensive weight of the evaluation score of the current level evaluation index, including: According to the analytic network hierarchy process, the subjective weight of the evaluation score of the current level evaluation index is calculated; According to the entropy weight method, the objective weight of the evaluation score of the current level evaluation indicator is calculated; Based on the subjective weight and the objective weight, the comprehensive weight of the evaluation score of the current level evaluation index is calculated.

[0011] In some possible implementations, calculating the comprehensive weight of the evaluation score of the current level evaluation indicator based on the subjective weight and the objective weight includes: According to the combined weighting method, the comprehensive weight of the evaluation score of the current level evaluation index is calculated based on the subjective weight and the objective weight.

[0012] In some possible implementations, the method further includes: when the evaluation score of any one of the final evaluation indicators is lower than a preset value, obtaining a comprehensive evaluation result that is unacceptable.

[0013] The present application also provides an off-road vehicle maintainability design evaluation method device, comprising: An evaluation index determination unit, used to determine a multi-level evaluation index affecting the maintainability of the off-road vehicle according to the structure of the off-road vehicle; An evaluation score acquisition unit, used to acquire the evaluation score of the last level evaluation indicator in the multi-level evaluation indicators; The evaluation result determination unit is used to calculate the evaluation score of the previous level evaluation indicator by weighted summing up the evaluation scores of the current level evaluation indicators in the multi-level evaluation indicators from the last level evaluation indicator forward based on the evaluation score of the last level evaluation indicator, and finally obtain a comprehensive evaluation result.

[0014] The present application also provides an electronic device, including a memory and a processor; The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the above-mentioned off-road vehicle maintainability design evaluation method.

[0015] The beneficial effect of the present application is that the off-road vehicle maintainability design evaluation method provided by the present application constructs a multi-level evaluation system, performs weighted summation from bottom to top and gradually calculates the evaluation scores of the evaluation indicators of the previous level to obtain a comprehensive evaluation result, thereby forming a systematic, comprehensive and scientific evaluation system, providing practical data support and guidance for the off-road vehicle maintainability design, thereby achieving the effect of improving the maintainability of the off-road vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic flow chart of an embodiment of the off-road vehicle maintainability design evaluation method provided in this application; Figure 2 For this application Figure 1 A schematic flow chart of an embodiment of step S103; Figure 3 For this application Figure 2 A schematic flow chart of an embodiment of step S201; Figure 4 A schematic diagram of the structure of an embodiment of an off-road vehicle maintainability design evaluation method device provided in this application; Figure 5 A schematic diagram of the structure of an embodiment of an electronic device provided in this application. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0018] It should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts may be implemented out of order, and steps without logical contextual relationships may be reversed in order or implemented simultaneously. In addition, those skilled in the art may add one or more other operations to the flowcharts, or may remove one or more operations from the flowcharts, under the guidance of the content of this application. Some of the block diagrams shown in the accompanying drawings are functional entities, and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor systems and / or microcontroller systems.

[0019] The descriptions of "first", "second", etc. involved in the embodiments of the present application are only used to describe the implicit purpose, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the technical features defined as "first" and "second" may explicitly or implicitly include at least one of the features. "And / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example: A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The present application provides an off-road vehicle maintainability design evaluation method, which is described below.

[0022] Figure 1 A schematic diagram of an embodiment of the off-road vehicle maintainability design evaluation method provided in this application is as follows: Figure 1 As shown in the figure, the off-road vehicle maintainability design evaluation method includes: S101. Determine a multi-level evaluation index that affects the maintainability of the off-road vehicle based on the structure of the off-road vehicle; S102, obtaining the evaluation score of the last level evaluation index in the multi-level evaluation index; S103, based on the evaluation score of the last evaluation indicator, weighted sum of the evaluation scores of the current evaluation indicator in the multi-level evaluation indicators is performed in sequence from the last evaluation indicator in the multi-level evaluation indicators to calculate the evaluation score of the previous evaluation indicator, and finally obtain a comprehensive evaluation result.

[0023] Compared with the prior art, the present application constructs a multi-level evaluation system, performs weighted summation from bottom to top and gradually calculates the evaluation scores of the evaluation indicators of the previous level to obtain a comprehensive evaluation result, thereby forming a systematic, comprehensive and scientific evaluation system, providing practical data support and guidance for the maintainability design of off-road vehicles, thereby achieving the effect of improving the maintainability of off-road vehicles.

[0024] In order to better determine the multi-level evaluation indicators for the off-road vehicle structure, in some embodiments, the multi-level evaluation indicators include first-level, second-level and third-level evaluation indicators, and the third level is the final level; among them, the first-level evaluation indicators include maintenance safety, maintenance accessibility, standardization and interchangeability, error prevention and identification marks, reduction of maintenance content and reduction of maintenance skills, and human factor engineering; the second-level evaluation indicators are the subsystems of the off-road vehicle, and the subsystems include the power system, transmission system, frame system, driving system, braking system, electrical system, body system, information system and other systems; the third-level evaluation indicators include various maintenance items, and the maintenance items are determined by the corresponding subsystem structure. The maintenance items of the power system are taken as an example to illustrate. The maintenance items of the power system include engine replacement, engine thermostat replacement and engine water temperature sensor replacement, etc.

[0025] It should be noted that the evaluation principle of maintenance safety is: maintenance personnel should avoid contact with high temperature, high pressure and sharp parts in the surrounding environment during operation; during maintenance, parts that may be dangerous should be marked with eye-catching signs, symbols and text warnings to prevent accidents that endanger the safety of personnel and equipment. The evaluation principle of maintenance accessibility is: during maintenance, parts that need frequent maintenance should have good maintenance accessibility and sufficient installation and disassembly space; all inspection points, test points, inspection windows, lubrication points, filling ports, etc. should be arranged in accessible positions. The evaluation principle of improving standardization and interchangeability is: adopt standardized design and standardized equipment, machinery and parts, and provide reasonable use tolerances according to the use and maintenance conditions to ensure that equipment, machinery and parts have physical (structure, appearance, material) and functional interchangeability; the evaluation principle of error prevention and identification marks is: have perfect error prevention measures; take measures to prevent possible errors for factors that are prone to human errors, so that even if errors occur, they can be discovered immediately to avoid damage to equipment and accidents; have obvious identification marks; maintenance signs, symbols and technical data are clear and accurate. The meaning of the logo, symbol and color of the nameplate shall comply with the regulations. The evaluation principle for reducing maintenance content and reducing maintenance skills is: on the premise of meeting the specified functions, the structure should be as simple as possible, avoid frequent disassembly and maintenance, and minimize the maintenance content and frequency to make maintenance simple. The evaluation principle for meeting the requirements of human factor engineering is: the maintenance working conditions are in line with the physiological parameters and capabilities of the human body, so that the operator can perform maintenance work in a relatively comfortable operating posture under good environmental conditions.

[0026] In order to better determine the weights and improve the scientific nature of the evaluation, in some embodiments, Figure 2 As shown, in step S103, the evaluation scores of the current level evaluation indicators are weighted and summed to calculate the evaluation scores of the previous level evaluation indicators, which specifically includes: S201, combining the network analytic hierarchy process and the entropy weight method to calculate the comprehensive weight of the evaluation score of the current level evaluation index; S202: Based on the comprehensive weight, the evaluation scores of the current-level evaluation indicators are weighted and summed to calculate the evaluation scores of the previous-level evaluation indicators.

[0027] Specifically, if Figure 3 As shown, step S201 includes: S301, calculating the subjective weight of the evaluation score of the current level evaluation index according to the network analysis hierarchy process; It should be noted that the method specifically includes: analyzing the relationship between various factors in the current evaluation index layer, constructing a judgment matrix between each indicator in the evaluation index layer and the corresponding indicator in the evaluation index layer; solving the maximum eigenvalue of the judgment matrix and performing a consistency test on the judgment matrix; performing normalization processing on the judgment matrix after the consistency test to obtain a normalized matrix; calculating the sum of each row of the normalized matrix to obtain a preliminary value of the weight vector, normalizing the weight vector and obtaining the final subjective weight.

[0028] S302, calculating the objective weight of the evaluation score of the current level evaluation index according to the entropy weight method; It should be noted that the entropy weight method is based on the characteristics of entropy. It determines the degree of discreteness of indicators by calculating the entropy value. The greater the degree of discreteness of the indicator, the greater the impact of the indicator on the comprehensive evaluation. The indicator data is standardized, and indicators of different dimensions and properties are converted into comparable values. Specifically, it includes: calculating the proportion of each indicator in the evaluation indicator layer, calculating the entropy value of each indicator based on the proportion, calculating the difference coefficient of each indicator based on the entropy value, and calculating the objective weight of each indicator based on the difference coefficient.

[0029] S303. According to the combined weighting method, the comprehensive weight of the evaluation score of the current level evaluation index is calculated based on the subjective weight and the objective weight.

[0030] It should be noted that the comprehensive weight is:

[0031] in, represents the comprehensive weight, represents the subjective weight, represents the objective weight, represents a constant, .

[0032] In some embodiments, the method further includes: when the evaluation score of any one of the final evaluation indicators is lower than a preset value, obtaining a comprehensive evaluation result that is unacceptable.

[0033] In order to better implement an off-road vehicle maintainability design evaluation method in the embodiment of the present application, based on an off-road vehicle maintainability design evaluation method, correspondingly, Figure 4 As shown, the embodiment of the present application also provides an off-road vehicle maintainability design evaluation method device 400, comprising: An evaluation index determination unit 401 is used to determine a multi-level evaluation index affecting the maintainability of the off-road vehicle according to the structure of the off-road vehicle; An evaluation score acquisition unit 402 is used to acquire the evaluation score of the last level evaluation index in the multi-level evaluation index; The evaluation result determination unit 403 is used to calculate the evaluation score of the previous level evaluation indicator by weighted summing the evaluation scores of the current level evaluation indicators in the multi-level evaluation indicators from the last level evaluation indicator forward based on the evaluation score of the last level evaluation indicator, and finally obtain a comprehensive evaluation result.

[0034] The off-road vehicle maintainability design evaluation method device 400 provided in the above embodiment can implement the technical solution described in the above off-road vehicle maintainability design evaluation method embodiment. The specific implementation principles of the above units can refer to the corresponding contents in the above off-road vehicle maintainability design evaluation method embodiment, which will not be repeated here.

[0035] like Figure 5 As shown, the present application also provides an electronic device 500. The electronic device 500 includes a processor 501, a memory 502 and a display 503. Figure 5 Only some components of the electronic device 500 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0036] In some embodiments, the memory 502 may be an internal storage unit of the electronic device 500, such as a hard disk or memory of the electronic device 500. In other embodiments, the memory 502 may also be an external storage device of the electronic device 500, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 500.

[0037] Furthermore, the memory 502 may include both an internal storage unit of the electronic device 500 and an external storage device. The memory 502 is used to store application software installed in the electronic device 500 and various data.

[0038] In some embodiments, the processor 501 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 502, such as the off-road vehicle maintainability design evaluation method in the present application.

[0039] In some embodiments, the display 503 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 503 is used to display information on the electronic device 500 and to display a visual user interface. The components 501-503 of the electronic device 500 communicate with each other via a system bus.

[0040] In some embodiments of the present application, when the processor 501 executes the off-road vehicle maintainability design evaluation method program in the memory 502, the following steps may be implemented: According to the structure of off-road vehicles, determine the multi-level evaluation indexes that affect the maintainability of off-road vehicles; Obtain the evaluation score of the final evaluation indicator in the multi-level evaluation indicators; Based on the evaluation score of the last-level evaluation indicator, the evaluation scores of the current-level evaluation indicators are weighted and summed up in sequence from the last-level evaluation indicator in the multi-level evaluation indicators to calculate the evaluation score of the previous-level evaluation indicator, and finally a comprehensive evaluation result is obtained.

[0041] It should be understood that: when the processor 501 executes the off-road vehicle maintainability design evaluation method program in the memory 502, in addition to the above functions, other functions can also be implemented. For details, please refer to the description of the corresponding method embodiment above.

[0042] Furthermore, the embodiment of the present application does not specifically limit the type of the electronic device 500 mentioned, and the electronic device 500 may be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable electronic devices include but are not limited to portable electronic devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable electronic device may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present application, the electronic device 500 may not be a portable electronic device, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0043] The above is a detailed introduction to an off-road vehicle maintainability design evaluation method provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

[0044] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A method for evaluating the maintainability of an off-road vehicle, characterized in that: include: According to the structure of off-road vehicles, determine the multi-level evaluation indexes that affect the maintainability of off-road vehicles; Obtaining the evaluation score of the last level evaluation indicator in the multi-level evaluation indicators; Based on the evaluation score of the final evaluation indicator, the evaluation scores of the current evaluation indicators in the multi-level evaluation indicators are weighted and summed up in sequence from the final evaluation indicator in the multi-level evaluation indicators to calculate the evaluation score of the previous evaluation indicator, and finally a comprehensive evaluation result is obtained.

2. The off-road vehicle maintainability design evaluation method according to claim 1, characterized in that: The multi-level evaluation index includes a first-level evaluation index, and the first-level evaluation index includes maintenance safety, maintenance accessibility, standardization and interchangeability, error prevention and identification marking, reduction of maintenance content and maintenance skills, and human factor engineering.

3. The off-road vehicle maintainability design evaluation method according to claim 2, characterized in that: The multi-level evaluation index also includes secondary evaluation index, and the secondary evaluation index is each subsystem of the off-road vehicle, and the subsystem includes power system, transmission system, frame system, driving system, braking system, electrical system, body system, information system and other systems.

4. The off-road vehicle maintainability design evaluation method according to claim 3, characterized in that: The multi-level evaluation index also includes a three-level evaluation index, and the three-level evaluation index includes various maintenance items, and the maintenance items are determined by the corresponding subsystem structure.

5. The off-road vehicle maintainability design evaluation method according to claim 1, characterized in that: The evaluation scores of the current level evaluation indicators are weighted and summed to calculate the evaluation scores of the previous level evaluation indicators, including: Combining the analytic network hierarchy process with the entropy weight method, the comprehensive weight of the evaluation score of the current level evaluation index is calculated; Based on the comprehensive weight, the evaluation scores of the current level evaluation indicators are weighted and summed to calculate the evaluation scores of the previous level evaluation indicators.

6. The off-road vehicle maintainability design evaluation method according to claim 5, characterized in that: Combining the analytic hierarchy process with the entropy weight method, the comprehensive weight of the evaluation score of the current level evaluation index is calculated, including: According to the analytic network hierarchy process, the subjective weight of the evaluation score of the current level evaluation index is calculated; According to the entropy weight method, the objective weight of the evaluation score of the current level evaluation indicator is calculated; Based on the subjective weight and the objective weight, the comprehensive weight of the evaluation score of the current level evaluation index is calculated.

7. The off-road vehicle maintainability design evaluation method according to claim 6, characterized in that: Based on the subjective weight and the objective weight, the comprehensive weight of the evaluation score of the current level evaluation index is calculated, including: According to the combined weighting method, the comprehensive weight of the evaluation score of the current level evaluation index is calculated based on the subjective weight and the objective weight.

8. The off-road vehicle maintainability design evaluation method according to claim 1, characterized in that: The method further comprises: When the evaluation score of any one of the final evaluation indicators is lower than a preset value, the comprehensive evaluation result is unacceptable.

9. An off-road vehicle maintainability design evaluation method and device, characterized in that: include: An evaluation index determination unit, used to determine a multi-level evaluation index affecting the maintainability of the off-road vehicle according to the structure of the off-road vehicle; An evaluation score acquisition unit, used to acquire the evaluation score of the last level evaluation indicator in the multi-level evaluation indicators; The evaluation result determination unit is used to calculate the evaluation score of the previous level evaluation indicator by weighted summing up the evaluation scores of the current level evaluation indicators in the multi-level evaluation indicators from the last level evaluation indicator forward based on the evaluation score of the last level evaluation indicator, and finally obtain a comprehensive evaluation result.

10. An electronic device, characterized in that: including memory and processor; The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the off-road vehicle maintainability design evaluation method described in any one of claims 1 to 8 above.

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