Maintenance analysis item determination method and system based on important characteristics

Abstract

The invention belongs to the technical field of aircraft maintenance guarantee, and particularly relates to a maintenance analysis item determination method and system based on important characteristics, and the method is characterized in that the method comprises the steps: the preliminary determination of a maintenance analysis item: the importance of a product function is based on the importance of the product function; preliminarily determining a maintenance analysis item; a step of determining a maintenance analysis item based on functional characteristic analysis: analyzing, judging and preliminarily determining a functional characteristic level of the maintenance analysis item from four dimensions of influence on safety, influence on tasks, hidden faults and economic loss, and further determining the maintenance analysis item and a non-important maintenance analysis item; and a maintenance analysis item determination step based on performance characteristic analysis: analyzing, judging and preliminarily determining the performance characteristic level of the maintenance analysis item from four dimensions of influence on safety, influence on tasks and economic loss, and further determining the maintenance analysis item and a non-important maintenance analysis item.

Description

Technical Field

[0001] The present application belongs to the field of aircraft maintenance and support technology, and specifically relates to a maintenance analysis item determination method based on key characteristics and a system thereof. Background Art

[0002] The technical basis for the preparation of a preventive maintenance program is a process of determining equipment preventive maintenance requirements through reliability-centered maintenance analysis using logical decision-making methods.

[0003] The preventive maintenance program is the basic document for aircraft maintenance and support. It provides an effective maintenance plan for aircraft systems and structures to maintain the inherent design level of reliability and safety, thereby ensuring the safe operation of the aircraft under the conditions of continuous airworthiness. The preventive maintenance program is an executive document for ground crew to perform regular aircraft inspections, stipulating that ground crew should perform specific inspection tasks at specific times.

[0004] Reliability-centered maintenance analysis includes four parts: system analysis, structural analysis, regional analysis and L / HIRF analysis. The first step of reliability-centered maintenance analysis is to determine the preventive maintenance object. The preventive maintenance object is determined by analyzing the maintenance analysis items. Whether the determination is correct and reasonable is related to whether the preventive maintenance outline is comprehensive and accurate.

[0005] System analysis is a series of logical decision analyses for maintenance analysis projects. Currently, there is only an overall analysis framework and process, and there is a lack of operational processes and engineering judgment methods. In view of this, this application is proposed. Summary of the invention

[0006] The purpose of this application is to provide a maintenance analysis project determination method based on key characteristics and its system, so as to help reasonably determine the analysis objects of the preventive maintenance program.

[0007] To overcome or alleviate at least one of the known technical deficiencies.

[0008] The technical solution of this application is:

[0009] On the one hand, a method for determining maintenance analysis items based on key characteristics is provided, comprising:

[0010] Initial determination steps for maintenance analysis projects: Initially determine maintenance analysis projects based on the importance of product functions;

[0011] The steps of determining maintenance analysis items based on functional characteristics analysis: from the four dimensions of impact on safety, impact on tasks, hidden failures, and economic losses, the functional characteristics level of maintenance analysis items is initially determined through analysis and judgment, and then maintenance analysis items and non-important maintenance analysis items are determined;

[0012] The steps for determining maintenance analysis items based on performance characteristic analysis are as follows: from the three dimensions of impact on safety, impact on tasks, and economic losses, the performance characteristic level of the maintenance analysis items is preliminarily determined through analysis and judgment, and then the maintenance analysis items and non-important maintenance analysis items are determined.

[0013] According to at least one embodiment of the present application, in the above-mentioned maintenance analysis item determination method based on key characteristics, the maintenance analysis item preliminary determination step specifically includes:

[0014] S11. List the products layer by layer, starting from the system level to the lowest level units that can be directly replaced or repaired on the aircraft, to form a structural block diagram of the aircraft;

[0015] S12. Determine the important functional products of products at all levels from top to bottom starting from the system level;

[0016] S13. Select important functional products at a reasonable level and preliminarily identify them as maintenance analysis projects.

[0017] According to at least one embodiment of the present application, in the above-mentioned method for determining maintenance analysis items based on critical characteristics, in S12, if a certain product is determined to be an important function product, then continue to determine whether the next-level product is an important function product, until a non-important function product or a unit at the lowest level that can be directly replaced or repaired on the aircraft is reached;

[0018] Products whose functional failure affects safety, or affects missions, or has significant economic impact are identified as important functional products.

[0019] According to at least one embodiment of the present application, in the above-mentioned method for determining maintenance analysis items based on critical characteristics, in S12, the upper-layer product of the lowest-level important function product is preliminarily determined as a maintenance analysis item.

[0020] According to at least one embodiment of the present application, in the above-mentioned maintenance analysis item determination method based on key characteristics, the maintenance analysis item determination step based on functional characteristic analysis specifically includes:

[0021] S21. Determine whether the functional failure of the maintenance analysis item determined initially will directly lead to a disaster (Class I), or directly lead to danger (Class II), or whether a combination of factors will lead to a disaster (Class I). If so, determine that the functional characteristic level of the maintenance analysis item determined initially is a critical characteristic. Otherwise, determine whether the functional failure of the maintenance analysis item determined initially will directly lead to mission failure.

[0022] If the functional failure of the maintenance analysis item is initially determined to directly lead to mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic; otherwise, it is determined whether the functional failure of the maintenance analysis item is hidden;

[0023] If the functional failure of the maintenance analysis item is preliminarily determined to be not concealed, then determine whether the functional failure of the maintenance analysis item preliminarily determined will result in significant economic losses; otherwise, determine whether the functional failure of the maintenance analysis item preliminarily determined will result in a dangerous combination (Class II) or a mission failure;

[0024] If the functional failure of the maintenance analysis item is initially determined to result in a dangerous (Class II) combination, or the combination results in mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic. Otherwise, it is determined whether the functional failure of the maintenance analysis item results in significant economic losses.

[0025] If the functional failure of the maintenance analysis item is preliminarily determined to cause significant economic losses, the functional characteristic level of the maintenance analysis item is determined to be an important characteristic; otherwise, the functional characteristic level of the maintenance analysis item is determined to be a general characteristic;

[0026] S22. The maintenance analysis items whose functional characteristics are classified as key characteristics or important characteristics and are preliminarily determined are determined as maintenance analysis items, and the maintenance analysis items whose functional characteristics are classified as general characteristics and are preliminarily determined are determined as non-important maintenance analysis items.

[0027] According to at least one embodiment of the present application, in the above-mentioned maintenance analysis item determination method based on key characteristics, the maintenance analysis item determination step based on performance characteristic analysis specifically includes:

[0028] Determine whether the performance of the maintenance analysis item is related to flight safety. If not, determine whether the performance of the maintenance analysis item is related to mission completion. Otherwise, determine whether the performance of the maintenance analysis item is a redundant system on the aircraft, whether there are other measures to ensure safe flight after performance deviation, and the possibility of performance deviation.

[0029] If the performance of the maintenance analysis item is preliminarily determined to be a redundant system on board, or there are other measures on board to ensure safe flight after performance deviation, or performance deviation is extremely unlikely to occur, the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance of the maintenance analysis item is preliminarily determined to be not a redundant system on board, there are no other measures on board to ensure safe flight after performance deviation, performance deviation occurs frequently or is likely to occur or occurs accidentally or rarely, and the performance deviation directly endangers flight safety, the performance characteristic level of the maintenance analysis item is preliminarily determined to be a key characteristic;

[0030] If it is preliminarily determined that the performance of the maintenance analysis item is irrelevant to the completion of the mission, then determine whether the performance deviation will lead to significant economic losses. Otherwise, determine whether the performance is a redundant system on the aircraft, whether there are other measures on the aircraft to ensure the completion of the flight mission after the performance deviation, and the possibility of performance deviation;

[0031] If the performance is a redundant system on board, or there are other measures on board to ensure the completion of the flight mission after the performance deviation, or the performance deviation rarely occurs or is extremely unlikely to occur, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance is not a redundant system on board, there are no other measures on board to ensure the completion of the flight mission after the performance deviation, the performance deviation often occurs or is likely to occur or occurs accidentally, and the performance deviation directly affects the flight mission, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic;

[0032] If the performance deviation of the maintenance analysis item preliminarily determined results in significant economic losses, the performance characteristic level of the maintenance analysis item preliminarily determined is determined to be a key characteristic; otherwise, the performance characteristic level of the maintenance analysis item preliminarily determined is determined to be a general characteristic;

[0033] The maintenance analysis items that are preliminarily determined with the performance characteristic level of key characteristics and important characteristics are determined as maintenance analysis items, and the maintenance analysis items that are preliminarily determined with the performance characteristic level of general characteristics are determined as non-important maintenance analysis items.

[0034] On the other hand, a maintenance analysis project determination system based on key characteristics is provided, comprising:

[0035] Maintenance analysis project preliminary determination module: based on the importance of product functions, preliminary determination of maintenance analysis projects;

[0036] Maintenance analysis project determination module based on functional characteristics analysis: from the four dimensions of impact on safety, impact on tasks, hidden failures, and economic losses, the functional characteristics level of maintenance analysis projects is initially determined through analysis and judgment, and then maintenance analysis projects and non-important maintenance analysis projects are determined;

[0037] Maintenance analysis project determination module based on performance characteristic analysis: from the three dimensions of impact on safety, impact on mission, and economic loss, the performance characteristic level of the maintenance analysis project is preliminarily determined through analysis and judgment, and then the maintenance analysis projects and non-important maintenance analysis projects are determined.

[0038] According to at least one embodiment of the present application, in the above-mentioned maintenance analysis project determination system based on key characteristics, in the maintenance analysis project preliminary determination module:

[0039] Starting from the system level to the lowest level unit that can be directly replaced or repaired on the aircraft, each product is listed layer by layer to form the aircraft's structural block diagram;

[0040] Starting from the system level, we will determine the important functional products of each level from top to bottom;

[0041] Select important functional products at a reasonable level and preliminarily identify them as maintenance analysis projects.

[0042] According to at least one embodiment of the present application, in the above-mentioned maintenance analysis item determination system based on critical characteristics, in the maintenance analysis item preliminary determination module, if a certain product is determined to be an important function product, then continue to determine whether the next-level product is an important function product, until a non-important function product or a unit at the lowest level that can be directly replaced or repaired on the aircraft is determined;

[0043] Products whose functional failure affects safety, or affects missions, or has significant economic impact are identified as important functional products.

[0044] According to at least one embodiment of the present application, in the above-mentioned maintenance analysis project determination system based on critical characteristics, in the maintenance analysis project preliminary determination module, the upper-layer product of the lowest-level important function product is preliminarily determined as a maintenance analysis project.

[0045] According to at least one embodiment of the present application, in the above-mentioned maintenance analysis project determination system based on key characteristics, in the maintenance analysis project determination module based on functional characteristics analysis:

[0046] Determine whether the functional failure of the maintenance analysis project initially determined directly leads to a disaster (Class I), or directly leads to danger (Class II), or whether a combination leads to a disaster (Class I). If so, determine that the functional characteristic level of the maintenance analysis project initially determined is a key characteristic. Otherwise, determine whether the functional failure of the maintenance analysis project initially determined directly leads to mission failure.

[0047] If the functional failure of the maintenance analysis item is initially determined to directly lead to mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic; otherwise, it is determined whether the functional failure of the maintenance analysis item is hidden;

[0048] If the functional failure of the maintenance analysis item is preliminarily determined to be not concealed, then determine whether the functional failure of the maintenance analysis item preliminarily determined will result in significant economic losses; otherwise, determine whether the functional failure of the maintenance analysis item preliminarily determined will result in a dangerous combination (Class II) or a mission failure;

[0049] If the functional failure of the maintenance analysis item is initially determined to result in a dangerous (Class II) combination, or the combination results in mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic. Otherwise, it is determined whether the functional failure of the maintenance analysis item results in significant economic losses.

[0050] If the functional failure of the maintenance analysis item is preliminarily determined to cause significant economic losses, the functional characteristic level of the maintenance analysis item is determined to be an important characteristic; otherwise, the functional characteristic level of the maintenance analysis item is determined to be a general characteristic;

[0051] The maintenance analysis items that are preliminarily determined with the functional characteristic level of key characteristics and important characteristics are determined as maintenance analysis items, and the maintenance analysis items that are preliminarily determined with the functional characteristic level of general characteristics are determined as non-important maintenance analysis items.

[0052] According to at least one embodiment of the present application, in the above-mentioned maintenance analysis project determination system based on key characteristics, in the maintenance analysis project determination module based on performance characteristic analysis:

[0053] Determine whether the performance of the maintenance analysis item is related to flight safety. If not, determine whether the performance of the maintenance analysis item is related to mission completion. Otherwise, determine whether the performance of the maintenance analysis item is a redundant system on the aircraft, whether there are other measures to ensure safe flight after performance deviation, and the possibility of performance deviation.

[0054] If the performance of the maintenance analysis item is preliminarily determined to be a redundant system on board, or there are other measures on board to ensure safe flight after performance deviation, or performance deviation is extremely unlikely to occur, the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance of the maintenance analysis item is preliminarily determined to be not a redundant system on board, there are no other measures on board to ensure safe flight after performance deviation, performance deviation occurs frequently or is likely to occur or occurs accidentally or rarely, and the performance deviation directly endangers flight safety, the performance characteristic level of the maintenance analysis item is preliminarily determined to be a key characteristic;

[0055] If it is preliminarily determined that the performance of the maintenance analysis item is irrelevant to the completion of the mission, then determine whether the performance deviation will lead to significant economic losses. Otherwise, determine whether the performance is a redundant system on the aircraft, whether there are other measures on the aircraft to ensure the completion of the flight mission after the performance deviation, and the possibility of performance deviation;

[0056] If the performance is a redundant system on board, or there are other measures on board to ensure the completion of the flight mission after the performance deviation, or the performance deviation rarely occurs or is extremely unlikely to occur, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance is not a redundant system on board, there are no other measures on board to ensure the completion of the flight mission after the performance deviation, the performance deviation often occurs or is likely to occur or occurs accidentally, and the performance deviation directly affects the flight mission, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic;

[0057] If the performance deviation of the maintenance analysis item preliminarily determined results in significant economic losses, the performance characteristic level of the maintenance analysis item preliminarily determined is determined to be a key characteristic; otherwise, the performance characteristic level of the maintenance analysis item preliminarily determined is determined to be a general characteristic;

[0058] The maintenance analysis items that are preliminarily determined with the performance characteristic level of key characteristics and important characteristics are determined as maintenance analysis items, and the maintenance analysis items that are preliminarily determined with the performance characteristic level of general characteristics are determined as non-important maintenance analysis items.

[0059] This application has at least the following beneficial technical effects:

[0060] Provided is a method and system for determining maintenance analysis items based on critical characteristics. On the basis of preliminarily determining maintenance analysis items based on the importance of product functions, maintenance analysis items and non-critical maintenance analysis items are determined based on function and performance characteristic analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 is a schematic diagram of a method for determining maintenance analysis items based on key characteristics provided in an embodiment of the present application;

[0062] Figure 2 It is a maintenance analysis project determination diagram based on functional characteristic analysis provided by an embodiment of the present application;

[0063] Figure 3 It is a maintenance analysis project determination diagram based on performance characteristic analysis provided by an embodiment of the present application;

[0064] Figure 4 It is a schematic diagram of a maintenance analysis item determination system based on key characteristics provided in an embodiment of the present application.

[0065] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be construed as limitations on the present application. DETAILED DESCRIPTION

[0066] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be described in further detail in detail and in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design.

[0067] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall have the usual meanings understood by those of ordinary skill in the art to which this application belongs. The words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "include" used in the description of this application indicates that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0068] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Technical personnel in the field can understand its specific meaning in this application according to the specific circumstances.

[0069] A method for determining maintenance analysis items based on key characteristics, such as Figure 1 shown.

[0070] Preliminary determination steps for maintenance analysis projects: Based on the importance of product functions, preliminarily determine the maintenance analysis projects.

[0071] S11. Starting from the system level to the lowest level unit that can be directly replaced or repaired on the aircraft, list each product layer by layer to form the structural block diagram of the aircraft.

[0072] S12. From the system level, determine the products at each level as important function products. If a product is determined to be an important function product, it should continue to determine whether the products at the next level are important function products, until it reaches a non-important function product or a unit at the lowest level that can be directly replaced or repaired on the aircraft.

[0073] Products whose functional failure affects safety, or affects missions, or has significant economic impact are identified as important functional products.

[0074] S13. Select important functional products at a reasonable level and preliminarily determine them as maintenance analysis projects. Generally, the upper-level products of the lowest-level important functional products can be preliminarily determined as maintenance analysis projects.

[0075] The steps for determining maintenance analysis items based on functional characteristics analysis are as follows: from the four dimensions of impact on safety, impact on tasks, hidden failures, and economic losses, the functional characteristics level of maintenance analysis items is initially determined through analysis and judgment, and then maintenance analysis items and non-important maintenance analysis items are determined. Figure 2 shown.

[0076] S21. Determine whether the functional failure of the maintenance analysis item determined initially will directly lead to a disaster (Class I), or directly lead to danger (Class II), or whether a combination of factors will lead to a disaster (Class I). If so, determine that the functional characteristic level of the maintenance analysis item determined initially is a critical characteristic. Otherwise, determine whether the functional failure of the maintenance analysis item determined initially will directly lead to mission failure.

[0077] If the functional failure of the maintenance analysis item is initially determined to directly lead to mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic; otherwise, it is determined whether the functional failure of the maintenance analysis item is hidden;

[0078] If the functional failure of the maintenance analysis item is preliminarily determined to be not concealed, then determine whether the functional failure of the maintenance analysis item preliminarily determined will result in significant economic losses; otherwise, determine whether the functional failure of the maintenance analysis item preliminarily determined will result in a dangerous combination (Class II) or a mission failure;

[0079] If the functional failure of the maintenance analysis item is initially determined to result in a dangerous (Class II) combination, or the combination results in mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic. Otherwise, it is determined whether the functional failure of the maintenance analysis item results in significant economic losses.

[0080] If it is preliminarily determined that the functional failure of the maintenance analysis item leads to significant economic losses, the functional characteristic level of the preliminarily determined maintenance analysis item is determined to be an important characteristic; otherwise, the functional characteristic level of the preliminarily determined maintenance analysis item is determined to be a general characteristic.

[0081] S22. The maintenance analysis items whose functional characteristics are classified as key characteristics or important characteristics and are preliminarily determined are determined as maintenance analysis items, and the maintenance analysis items whose functional characteristics are classified as general characteristics and are preliminarily determined are determined as non-important maintenance analysis items.

[0082] The steps for determining maintenance analysis items based on performance characteristics analysis are as follows: from the three dimensions of impact on safety, impact on tasks, and economic losses, the performance characteristics level of maintenance analysis items is initially determined through analysis and judgment, and then maintenance analysis items and non-important maintenance analysis items are determined. Figure 3 shown.

[0083] When performing the maintenance analysis item determination step based on the performance characteristic analysis, products that have been determined as maintenance analysis items may be excluded.

[0084] S31. Determine whether the performance of the maintenance analysis item determined initially is related to flight safety. If not, determine whether the performance of the maintenance analysis item determined initially is related to mission completion. Otherwise, determine whether the performance of the maintenance analysis item determined initially is a redundant system on board, whether there are other measures on board to ensure safe flight after performance deviation, and the possibility of performance deviation.

[0085] If the performance of the maintenance analysis item is preliminarily determined to be a redundant system on board, or there are other measures on board to ensure safe flight after performance deviation, or performance deviation is extremely unlikely to occur, the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance of the maintenance analysis item is preliminarily determined to be not a redundant system on board, there are no other measures on board to ensure safe flight after performance deviation, performance deviation occurs frequently or is likely to occur or occurs accidentally or rarely, and the performance deviation directly endangers flight safety, the performance characteristic level of the maintenance analysis item is preliminarily determined to be a key characteristic;

[0086] If it is preliminarily determined that the performance of the maintenance analysis item is irrelevant to the completion of the mission, then determine whether the performance deviation will lead to significant economic losses. Otherwise, determine whether the performance is a redundant system on the aircraft, whether there are other measures on the aircraft to ensure the completion of the flight mission after the performance deviation, and the possibility of performance deviation;

[0087] If the performance is a redundant system on board, or there are other measures on board to ensure the completion of the flight mission after the performance deviation, or the performance deviation rarely occurs or is extremely unlikely to occur, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance is not a redundant system on board, there are no other measures on board to ensure the completion of the flight mission after the performance deviation, the performance deviation often occurs or is likely to occur or occurs accidentally, and the performance deviation directly affects the flight mission, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic;

[0088] If the performance deviation of the maintenance analysis item is preliminarily determined to cause significant economic losses, the performance characteristic level of the maintenance analysis item is determined to be a key characteristic; otherwise, the performance characteristic level of the maintenance analysis item is determined to be a general characteristic.

[0089] S32. The maintenance analysis items whose performance characteristic levels are key characteristics and important characteristics and are preliminarily determined are determined as maintenance analysis items, and the maintenance analysis items whose performance characteristic levels are general characteristics and are preliminarily determined are determined as non-important maintenance analysis items.

[0090] The method for determining maintenance analysis items based on critical characteristics disclosed in the above-mentioned embodiment, on the basis of preliminarily determining maintenance analysis items based on the importance of product functions, determines maintenance analysis items and non-critical maintenance analysis items based on function and performance characteristic analysis, thereby providing an efficient and operational process and engineering judgment method for reasonably determining maintenance analysis items.

[0091] A maintenance analysis project determination system based on key characteristics, such as Figure 4 shown.

[0092] The maintenance analysis project preliminary determination module is used to preliminarily determine the maintenance analysis projects based on the importance of product functions.

[0093] Starting from the system level to the lowest level unit that can be directly replaced or repaired on the aircraft, each product is listed layer by layer to form the structural block diagram of the aircraft.

[0094] Starting from the system level, the products at each level are judged as important function products from top to bottom. If a product is determined to be an important function product, the next level product should be judged as an important function product until it is a non-important function product or a unit at the lowest level that can be directly replaced or repaired on the aircraft.

[0095] Products whose functional failure affects safety, or affects missions, or has significant economic impact are identified as important functional products.

[0096] Select the important functional products at a reasonable level and preliminarily determine them as maintenance analysis projects. Generally, the upper layer of products of the lowest level important functional products can be preliminarily determined as maintenance analysis projects.

[0097] The maintenance analysis project determination module based on functional characteristic analysis is used to analyze and determine the functional characteristic level of the maintenance analysis project from four dimensions: impact on safety, impact on mission, hidden failures, and economic losses, and then determine the maintenance analysis projects and non-important maintenance analysis projects.

[0098] Determine whether the functional failure of the maintenance analysis project initially determined directly leads to a disaster (Class I), or directly leads to danger (Class II), or whether a combination leads to a disaster (Class I). If so, determine that the functional characteristic level of the maintenance analysis project initially determined is a key characteristic. Otherwise, determine whether the functional failure of the maintenance analysis project initially determined directly leads to mission failure.

[0099] If the functional failure of the maintenance analysis item is initially determined to directly lead to mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic; otherwise, it is determined whether the functional failure of the maintenance analysis item is hidden;

[0100] If the functional failure of the maintenance analysis item is preliminarily determined to be not concealed, then determine whether the functional failure of the maintenance analysis item preliminarily determined will result in significant economic losses; otherwise, determine whether the functional failure of the maintenance analysis item preliminarily determined will result in a dangerous combination (Class II) or a mission failure;

[0101] If the functional failure of the maintenance analysis item is initially determined to result in a dangerous (Class II) combination, or the combination results in mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic. Otherwise, it is determined whether the functional failure of the maintenance analysis item results in significant economic losses.

[0102] If it is preliminarily determined that the functional failure of the maintenance analysis item leads to significant economic losses, the functional characteristic level of the preliminarily determined maintenance analysis item is determined to be an important characteristic; otherwise, the functional characteristic level of the preliminarily determined maintenance analysis item is determined to be a general characteristic.

[0103] The maintenance analysis items that are preliminarily determined with the functional characteristic level of key characteristics and important characteristics are determined as maintenance analysis items, and the maintenance analysis items that are preliminarily determined with the functional characteristic level of general characteristics are determined as non-important maintenance analysis items.

[0104] The maintenance analysis project determination module based on performance characteristic analysis is used to analyze and determine the performance characteristic level of the maintenance analysis project from three dimensions: impact on safety, impact on mission, and economic loss, and then determine the maintenance analysis project and non-important maintenance analysis project.

[0105] When performing the maintenance analysis project determination module based on performance characteristic analysis, products that have been determined as maintenance analysis projects may be excluded.

[0106] Determine whether the performance of the maintenance analysis item is related to flight safety. If not, determine whether the performance of the maintenance analysis item is related to mission completion. Otherwise, determine whether the performance of the maintenance analysis item is a redundant system on the aircraft, whether there are other measures to ensure safe flight after performance deviation, and the possibility of performance deviation.

[0107] If the performance of the maintenance analysis item is preliminarily determined to be a redundant system on board, or there are other measures on board to ensure safe flight after performance deviation, or performance deviation is extremely unlikely to occur, the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance of the maintenance analysis item is preliminarily determined to be not a redundant system on board, there are no other measures on board to ensure safe flight after performance deviation, performance deviation occurs frequently or is likely to occur or occurs accidentally or rarely, and the performance deviation directly endangers flight safety, the performance characteristic level of the maintenance analysis item is preliminarily determined to be a key characteristic;

[0108] If it is preliminarily determined that the performance of the maintenance analysis item is irrelevant to the completion of the mission, then determine whether the performance deviation will lead to significant economic losses. Otherwise, determine whether the performance is a redundant system on the aircraft, whether there are other measures on the aircraft to ensure the completion of the flight mission after the performance deviation, and the possibility of performance deviation;

[0109] If the performance is a redundant system on board, or there are other measures on board to ensure the completion of the flight mission after the performance deviation, or the performance deviation rarely occurs or is extremely unlikely to occur, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance is not a redundant system on board, there are no other measures on board to ensure the completion of the flight mission after the performance deviation, the performance deviation often occurs or is likely to occur or occurs accidentally, and the performance deviation directly affects the flight mission, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic;

[0110] If the performance deviation of the maintenance analysis item is preliminarily determined to cause significant economic losses, the performance characteristic level of the maintenance analysis item is determined to be a key characteristic; otherwise, the performance characteristic level of the maintenance analysis item is determined to be a general characteristic.

[0111] The maintenance analysis items that are preliminarily determined with the performance characteristic level of key characteristics and important characteristics are determined as maintenance analysis items, and the maintenance analysis items that are preliminarily determined with the performance characteristic level of general characteristics are determined as non-important maintenance analysis items.

[0112] Regarding the maintenance analysis project determination system based on key characteristics disclosed in the above-mentioned embodiment, since it corresponds to the maintenance analysis project determination method based on key characteristics disclosed in the above-mentioned embodiment, the description is relatively simple. For specific related points, please refer to the relevant instructions in the part of the maintenance analysis project determination method based on key characteristics. Its technical effects can also refer to the technical effects of the relevant parts of the maintenance analysis project determination method based on key characteristics, and will not be repeated here.

[0113] In addition, technicians in the field should also be able to realize that the various modules and units of the maintenance analysis project determination system based on key characteristics disclosed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, this application generally describes them according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Technicians in the field can choose to adopt different methods to implement the described functions for each specific application and its actual constraints, but such implementation should not be considered to be beyond the scope of this application.

[0114] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A method for determining maintenance analysis items based on key characteristics, characterized in that: include: Initial determination steps for maintenance analysis projects: Initially determine maintenance analysis projects based on the importance of product functions; The steps of determining maintenance analysis items based on functional characteristics analysis: from the four dimensions of impact on safety, impact on tasks, hidden failures, and economic losses, the functional characteristics level of maintenance analysis items is initially determined through analysis and judgment, and then maintenance analysis items and non-important maintenance analysis items are determined; The steps for determining maintenance analysis items based on performance characteristic analysis are as follows: from the three dimensions of impact on safety, impact on tasks, and economic losses, the performance characteristic level of the maintenance analysis items is preliminarily determined through analysis and judgment, and then the maintenance analysis items and non-important maintenance analysis items are determined.

2. The method for determining maintenance analysis items based on key characteristics according to claim 1, characterized in that: The initial steps for determining maintenance analysis projects include: S11. List the products layer by layer, starting from the system level to the lowest level units that can be directly replaced or repaired on the aircraft, to form a structural block diagram of the aircraft; S12. Determine the important functional products of products at all levels from top to bottom starting from the system level; S13. Select important functional products at a reasonable level and preliminarily identify them as maintenance analysis projects.

3. The method for determining maintenance analysis items based on critical characteristics according to claim 2, characterized in that: In S12, if a product is determined to be a critical function product, the next level of products will be determined to be critical function products until the non-critical function products or the lowest level units that can be directly replaced or repaired on the aircraft are determined; Products whose functional failure affects safety, or affects missions, or has significant economic impact are identified as important functional products.

4. The method for determining maintenance analysis items based on critical characteristics according to claim 3, characterized in that: In S12, the upper-layer product of the lowest-level important functional product is preliminarily determined as a maintenance analysis project.

5. The method for determining maintenance analysis items based on critical characteristics according to claim 4, characterized in that: The steps for determining maintenance analysis projects based on functional characteristics analysis include: S21. Determine whether the functional failure of the maintenance analysis item determined initially will directly lead to a disaster (Class I), or directly lead to danger (Class II), or whether a combination of factors will lead to a disaster (Class I). If so, determine that the functional characteristic level of the maintenance analysis item determined initially is a critical characteristic. Otherwise, determine whether the functional failure of the maintenance analysis item determined initially will directly lead to mission failure. If the functional failure of the maintenance analysis item is initially determined to directly lead to mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic; otherwise, it is determined whether the functional failure of the maintenance analysis item is hidden; If the functional failure of the maintenance analysis item is preliminarily determined to be not concealed, then determine whether the functional failure of the maintenance analysis item preliminarily determined will result in significant economic losses; otherwise, determine whether the functional failure of the maintenance analysis item preliminarily determined will result in a dangerous combination (Class II) or a mission failure; If the functional failure of the maintenance analysis item is initially determined to result in a dangerous (Class II) combination, or the combination results in mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic. Otherwise, it is determined whether the functional failure of the maintenance analysis item results in significant economic losses. If the functional failure of the maintenance analysis item is preliminarily determined to cause significant economic losses, the functional characteristic level of the maintenance analysis item is determined to be an important characteristic; otherwise, the functional characteristic level of the maintenance analysis item is determined to be a general characteristic; S22. The maintenance analysis items whose functional characteristics are classified as key characteristics or important characteristics and are preliminarily determined are determined as maintenance analysis items, and the maintenance analysis items whose functional characteristics are classified as general characteristics and are preliminarily determined are determined as non-important maintenance analysis items.

6. The method for determining maintenance analysis items based on key characteristics according to claim 5, characterized in that: The steps for determining maintenance analysis items based on performance characteristics analysis include: S31. Determine whether the performance of the maintenance analysis item determined initially is related to flight safety. If not, determine whether the performance of the maintenance analysis item determined initially is related to mission completion. Otherwise, determine whether the performance of the maintenance analysis item determined initially is a redundant system on board, whether there are other measures on board to ensure safe flight after performance deviation, and the possibility of performance deviation. If the performance of the maintenance analysis item is preliminarily determined to be a redundant system on board, or there are other measures on board to ensure safe flight after performance deviation, or performance deviation is extremely unlikely to occur, the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance of the maintenance analysis item is preliminarily determined to be not a redundant system on board, there are no other measures on board to ensure safe flight after performance deviation, performance deviation occurs frequently or is likely to occur or occurs accidentally or rarely, and the performance deviation directly endangers flight safety, the performance characteristic level of the maintenance analysis item is preliminarily determined to be a key characteristic; If it is preliminarily determined that the performance of the maintenance analysis item is irrelevant to the completion of the mission, then determine whether the performance deviation will lead to significant economic losses. Otherwise, determine whether the performance is a redundant system on the aircraft, whether there are other measures on the aircraft to ensure the completion of the flight mission after the performance deviation, and the possibility of performance deviation; If the performance is a redundant system on board, or there are other measures on board to ensure the completion of the flight mission after the performance deviation, or the performance deviation rarely occurs or is extremely unlikely to occur, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance is not a redundant system on board, there are no other measures on board to ensure the completion of the flight mission after the performance deviation, the performance deviation often occurs or is likely to occur or occurs accidentally, and the performance deviation directly affects the flight mission, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; If the performance deviation of the maintenance analysis item preliminarily determined results in significant economic losses, the performance characteristic level of the maintenance analysis item preliminarily determined is determined to be a key characteristic; otherwise, the performance characteristic level of the maintenance analysis item preliminarily determined is determined to be a general characteristic; S32. The maintenance analysis items whose performance characteristic levels are key characteristics and important characteristics and are preliminarily determined are determined as maintenance analysis items, and the maintenance analysis items whose performance characteristic levels are general characteristics and are preliminarily determined are determined as non-important maintenance analysis items.

7. A maintenance analysis item determination system based on key characteristics, characterized in that: include: Maintenance analysis project preliminary determination module: based on the importance of product functions, preliminary determination of maintenance analysis projects; Maintenance analysis project determination module based on functional characteristics analysis: from the four dimensions of impact on safety, impact on tasks, hidden failures, and economic losses, the functional characteristics level of maintenance analysis projects is initially determined through analysis and judgment, and then maintenance analysis projects and non-important maintenance analysis projects are determined; Maintenance analysis project determination module based on performance characteristic analysis: from the three dimensions of impact on safety, impact on mission, and economic loss, the performance characteristic level of the maintenance analysis project is preliminarily determined through analysis and judgment, and then the maintenance analysis projects and non-important maintenance analysis projects are determined.

8. The system for determining maintenance analysis items based on critical characteristics according to claim 7, characterized in that: In the maintenance analysis project preliminary determination module: Starting from the system level to the lowest level unit that can be directly replaced or repaired on the aircraft, each product is listed layer by layer to form the aircraft's structural block diagram; Starting from the system level, we will determine the important functional products of each level from top to bottom; Select important functional products at a reasonable level and preliminarily identify them as maintenance analysis projects.

9. The system for determining maintenance analysis items based on critical characteristics according to claim 8, characterized in that: In the initial determination module of the maintenance analysis project, if a product is determined to be an important function product, the next level of products will continue to be determined to be important function products, until the non-important function products or the lowest level units that can be directly replaced or repaired on the aircraft are reached; Products whose functional failure affects safety, or affects missions, or has significant economic impact are identified as important functional products.

10. The system for determining maintenance analysis items based on important characteristics according to claim 9, characterized in that: In the maintenance analysis project preliminary determination module, the upper-layer product of the lowest-level important functional product is preliminarily determined as a maintenance analysis project.

11. The system for determining maintenance analysis items based on critical characteristics according to claim 10, characterized in that: In the maintenance analysis project determination module based on functional characteristics analysis: Determine whether the functional failure of the maintenance analysis project initially determined directly leads to a disaster (Class I), or directly leads to danger (Class II), or whether a combination leads to a disaster (Class I). If so, determine that the functional characteristic level of the maintenance analysis project initially determined is a key characteristic. Otherwise, determine whether the functional failure of the maintenance analysis project initially determined directly leads to mission failure. If the functional failure of the maintenance analysis item is initially determined to directly lead to mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic; otherwise, it is determined whether the functional failure of the maintenance analysis item is hidden; If the functional failure of the maintenance analysis item is preliminarily determined to be not concealed, then determine whether the functional failure of the maintenance analysis item preliminarily determined will result in significant economic losses; otherwise, determine whether the functional failure of the maintenance analysis item preliminarily determined will result in a dangerous combination (Class II) or a mission failure; If the functional failure of the maintenance analysis item is initially determined to result in a dangerous (Class II) combination, or the combination results in mission failure, the functional characteristic level of the maintenance analysis item is determined to be a critical characteristic. Otherwise, it is determined whether the functional failure of the maintenance analysis item results in significant economic losses. If the functional failure of the maintenance analysis item is preliminarily determined to cause significant economic losses, the functional characteristic level of the maintenance analysis item is determined to be an important characteristic; otherwise, the functional characteristic level of the maintenance analysis item is determined to be a general characteristic; The maintenance analysis items that are preliminarily determined with the functional characteristic level of key characteristics and important characteristics are determined as maintenance analysis items, and the maintenance analysis items that are preliminarily determined with the functional characteristic level of general characteristics are determined as non-important maintenance analysis items.

12. The maintenance analysis item determination system based on critical characteristics according to claim 11, characterized in that: In the maintenance analysis project determination module based on performance characteristics analysis: Determine whether the performance of the maintenance analysis item is related to flight safety. If not, determine whether the performance of the maintenance analysis item is related to mission completion. Otherwise, determine whether the performance of the maintenance analysis item is a redundant system on the aircraft, whether there are other measures to ensure safe flight after performance deviation, and the possibility of performance deviation. If the performance of the maintenance analysis item is preliminarily determined to be a redundant system on board, or there are other measures on board to ensure safe flight after performance deviation, or performance deviation is extremely unlikely to occur, the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance of the maintenance analysis item is preliminarily determined to be not a redundant system on board, there are no other measures on board to ensure safe flight after performance deviation, performance deviation occurs frequently or is likely to occur or occurs accidentally or rarely, and the performance deviation directly endangers flight safety, the performance characteristic level of the maintenance analysis item is preliminarily determined to be a key characteristic; If it is preliminarily determined that the performance of the maintenance analysis item is irrelevant to the completion of the mission, then determine whether the performance deviation will lead to significant economic losses. Otherwise, determine whether the performance is a redundant system on the aircraft, whether there are other measures on the aircraft to ensure the completion of the flight mission after the performance deviation, and the possibility of performance deviation; If the performance is a redundant system on board, or there are other measures on board to ensure the completion of the flight mission after the performance deviation, or the performance deviation rarely occurs or is extremely unlikely to occur, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; if the performance is not a redundant system on board, there are no other measures on board to ensure the completion of the flight mission after the performance deviation, the performance deviation often occurs or is likely to occur or occurs accidentally, and the performance deviation directly affects the flight mission, then the performance characteristic level of the maintenance analysis item is preliminarily determined to be an important characteristic; If the performance deviation of the maintenance analysis item preliminarily determined results in significant economic losses, the performance characteristic level of the maintenance analysis item preliminarily determined is determined to be a key characteristic; otherwise, the performance characteristic level of the maintenance analysis item preliminarily determined is determined to be a general characteristic; The maintenance analysis items that are preliminarily determined with the performance characteristic level of key characteristics and important characteristics are determined as maintenance analysis items, and the maintenance analysis items that are preliminarily determined with the performance characteristic level of general characteristics are determined as non-important maintenance analysis items.

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