Civil aviation aviation material inventory guarantee control method, system and electronic equipment

Abstract

The application discloses a kind of civil aviation aviation material inventory guarantee management and control method, system and electronic equipment, it is related to aviation material inventory management field, its method includes: in future time period T, based on routine maintenance work calendar time, service time and service cycle are calculated respectively, and the demand of aviation material is calculated, and the demand quantity of aviation material i is obtained by comprehensive calculation;In time period T, aviation material corresponding to machine part is divided into MEL list and MEL list not belonging to two types and is calculated for non-routine work demand;Supplement calculation associated with the demand of aviation material, and the demand of aviation material for non-routine work is obtained by comprehensive calculation;On the basis of superimposed fleet size, the demand quantity of aviation material is calculated.The application realizes the accurate control of each type general aviation material inventory quantity, scientific configuration and dynamic adjustment, and then optimizes general aviation enterprise aviation material inventory structure and safety inventory level, improves aviation material inventory guarantee timeliness, saves operating cost.

Description

Technical Field

[0001] The present invention relates to the field of aviation material inventory management, and in particular to a method, system and electronic equipment for managing and controlling civil aviation material inventory. Background Art

[0002] General aviation is an important part of my country's low-altitude economy. Aviation material inventory management is one of the main tasks of general aviation enterprises in production and operation. It is also one of the main channels for capital consumption and capital occupation in general aviation enterprises, directly affecting the reliability, stability and economy of general aviation operations. Whether aviation material inventory management is scientific and efficient, and whether the inventory is sufficient, directly affects the stability and safety of civil aviation enterprises' production. At the same time, the imbalance between aviation material inventory guarantee rate and economy has led to increased aviation material inventory costs, which has also seriously restricted the development of civil aviation enterprises. Aviation material inventory management is not simply about managing the physical assets in the warehouses of civil aviation enterprises, but requires accurate prediction of the inventory demand of various types of aviation materials, and optimizing aviation material inventory through scientific ordering and meticulous management.

[0003] Currently, to fully ensure the smooth and safe operation of civil aviation, aviation material management departments in the civil aviation industry have long prioritized flight safety. This has led civil aviation companies to overemphasize material availability and neglect efficiency, resulting in excessively high total material reserves. Scientific and rational inventory control requires a thorough understanding of the demand patterns for various types of materials. However, due to the large number of aircraft models and the relatively small size of corporate fleets, general aviation companies' current material inventory management model is relatively crude and simplistic. All material types are manually assessed based on aircraft manufacturer recommendations and high safety stock levels are set. While this streamlines management workflow, it inevitably leads to material inventory management that is inconsistent with actual needs, resulting in significant backlogs of some materials and shortages of others. For example, at one general aviation company, over 80% of its material inventory has been stored for more than one year, and over half of its total material inventory has remained unused for three years, severely impacting operating costs and aircraft upgrades. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical problems pointed out by the background technology, and to provide a civil aviation aviation material inventory guarantee and control method, system and electronic equipment, which realizes the precise control, scientific configuration and dynamic adjustment of the inventory quantity of various types of general aviation aviation materials, thereby optimizing the general aviation enterprise's aviation material inventory structure and safety inventory level, improving the timeliness of aviation material inventory guarantee, and saving operating costs.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A method for controlling and managing inventory of civil aviation materials, comprising:

[0007] S100: Calculate the aviation material demand based on calendar time, usage time, and usage cycle based on routine maintenance work in the future time period T, and calculate the demand quantity of aviation material i through comprehensive calculation. ;

[0008] S200: During the time period T, aviation materials corresponding to the installed parts are divided into two categories: those belonging to the MEL list and those not belonging to the MEL list, and the demand for non-routine work is calculated; the demand for aviation materials related to replacement is supplemented, and the demand for aviation materials for non-routine work is obtained by comprehensive calculation. ;

[0009] S300, in terms of fleet size Based on this, the required quantity of aviation materials is calculated according to the following expression:

[0010] .

[0011] To better implement the present invention, in method S300, high-value turnover aviation materials are screened, and the demand for high-value turnover aviation materials is modified according to the following expression:

[0012] , It indicates that the demand correction result of aviation material i is a high-value turnover aviation material. The expected installed life of aviation material i is a high-value turnover aviation material. Indicates that the repair cycle of aviation material i is a high-value turnover aviation material. It indicates the scrap probability of aviation material i being a high-value turnover aviation material, is the risk factor.

[0013] Preferably, the method for calculating the aviation material demand for routine maintenance work by calendar time is as follows:

[0014] Filter the aviation materials related to calendar time from routine maintenance work and obtain the aviation material requirements as follows:

[0015] , where m is the routine card number in the routine maintenance work package, n is the total number of routine cards in the routine maintenance work package, The time interval for routine maintenance work of a single card m, is the process number of routine card m, is the total number of processes for a routine card m, For process The demand for aviation materials related to calendar time.

[0016] Preferably, the method for calculating the aviation material demand for routine maintenance work based on usage time is as follows:

[0017] Filter the aviation materials related to actual usage time from routine maintenance work and obtain the aviation material demand according to the following method:

[0018] , is the expected daily utilization rate; Run time ratio, For process The demand for aviation materials related to actual usage time, The time interval between routine maintenance work of aviation materials related to routine single card m and actual usage time.

[0019] Preferably, the method for calculating the aviation material demand for routine maintenance work based on the use cycle is as follows:

[0020] Filter the aviation materials related to the actual use cycle from routine maintenance work and obtain the aviation material requirements according to the following method:

[0021] ,in is the proportion of task k in time period T, is the typical runtime of task k, For process The demand for aviation materials related to the actual usage cycle.

[0022] Preferably, the required quantity of aviation material i The range expression is as follows:

[0023] ,in Calculate the required quantity of aviation materials according to calendar time for routine maintenance work. For routine maintenance work, the required quantity of aviation materials is calculated based on the usage time. For routine maintenance work, the required quantity of aviation materials is calculated based on the usage cycle.

[0024] Preferably, when the corresponding installed parts of aviation material i belong to the MEL list, the maintenance and replacement demand calculation expression is as follows:

[0025] ,in is the process of the aircraft material installation and maintenance work card specified in the aircraft maintenance manual; x is the total number of processes of the aircraft material installation and maintenance work card specified in the aircraft maintenance manual; For process The demand quantity of AVIC Materials' installed parts; The expected life of the aircraft parts installed;

[0026] When the corresponding installed parts of aviation material i are not included in the MEL list, the calculation expression for the maintenance and replacement demand is as follows:

[0027] ,in Expected lifespan and nearest time period of aviation parts and components Routine maintenance intervals.

[0028] Preferably, the expression for the supplementary calculation of the aviation material demand for associated replacement is as follows:

[0029] ,in To trigger the probability of associated replacement of aviation material i, is the current process of replacing maintenance work cards specified in the aircraft maintenance manual, and y is the total number of processes of aircraft material installation maintenance work cards specified in the aircraft maintenance manual; For process The demand quantity of AVIC Materials' installed parts; The expected life span of the associated replacement aviation materials.

[0030] A civil aviation material inventory support and control system for implementing a civil aviation material inventory support and control method includes a routine work demand calculation module, a non-routine work measurement module, and a superimposed fleet-scale material demand calculation module. The routine work demand calculation module is used to calculate the material demand based on calendar time, usage time, and usage cycle of routine maintenance work in the future time period T, and comprehensively calculate the required quantity of material i. The non-routine work measurement module is used to divide the corresponding parts of the aviation materials into two categories: those belonging to the MEL list and those not belonging to the MEL list in the time period T, and perform non-routine work demand calculation and supplement the calculation of the related replacement aviation materials demand, and comprehensively calculate the aviation materials demand for non-routine work The superimposed fleet size aviation material demand calculation module is in the superimposed fleet size Based on this, the required quantity of aviation materials is calculated according to the following expression: .

[0031] An electronic device comprises at least one processor, at least one memory, and a data bus; wherein: the processor and the memory communicate with each other via the data bus; the memory stores program instructions executed by the processor, and the processor calls the program instructions to execute the steps of the civil aviation material inventory guarantee control method of the present invention.

[0032] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0033] (1) The present invention realizes the precise control, scientific allocation and dynamic adjustment of the inventory quantity of various types of general aviation materials, thereby optimizing the inventory structure and safety inventory level of general aviation enterprises, improving the timeliness of material inventory guarantee, and saving operating costs.

[0034] (2) The present invention provides a method for calculating the demand for routine maintenance materials based on three different types of routine maintenance work in general aviation operations, namely calendar time, usage time and usage cycle, and taking into account the proportion of component operation time; the present invention provides a method for calculating the demand for non-routine maintenance materials based on the importance of installed parts and the properties of the materials, combined with the reliability and installed life of mechanical and electronic materials in use.

[0035] (3) The present invention can provide a method for correcting the demand for high-value turnover aviation materials according to the failure and scrapping of aviation materials and mission risks, thereby improving the economic level of inventory control of high-value turnover aviation materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a flowchart of the method for controlling the inventory of civil aviation materials. DETAILED DESCRIPTION

[0037] Below in conjunction with embodiment, the present invention is described in further detail:

[0038] Example

[0039] like Figure 1 As shown, a method for controlling and managing inventory of civil aviation materials includes:

[0040] S100: Calculate the aviation material demand based on calendar time, usage time, and usage cycle based on routine maintenance work in the future time period T, and calculate the demand quantity of aviation material i through comprehensive calculation. There are many types of aviation material inventories (materials in aviation material inventories are divided into routine maintenance work requirements and non-routine work requirements based on support operations. Non-routine work requirements include those that belong to the MEL list and those that do not belong to the MEL list). Some aircraft materials are general-purpose (generally used in routine maintenance work) or have high-value attributes, which makes estimating the number of aircraft material inventories extremely complex. In some embodiments, the method for calculating the aircraft material demand for routine maintenance work by calendar time is as follows:

[0041] Filter out calendar-related parts from routine maintenance work (for example, parts such as rubber rings and seals whose aging process is related to calendar time). Calculate the part requirements using the following method:

[0042] , where m is the routine card number in the routine maintenance work package, n is the total number of routine cards in the routine maintenance work package, The time interval for routine maintenance work (related to calendar time) for routine card m, is the process number of routine card m, is the total number of processes for a routine card m, For process The demand for aviation materials related to calendar time.

[0043] In some embodiments, the method for calculating the aviation material demand for routine maintenance work based on usage time is as follows:

[0044] Filter out aviation materials related to actual service life from routine maintenance work (for example, lubricating oil, rotating parts, and other aviation materials have service lives that are related to actual service life). Calculate aviation material requirements using the following method:

[0045] , is the expected daily utilization rate; is the running time ratio, For process The demand for aviation materials related to actual usage time, The time interval for routine maintenance work (related to the actual use time) of aviation materials.

[0046] The example is as follows: the time period T is 8760 hours (i.e. one year), The example value is 0.8. The example value is 1 (i.e. 100%). The example value is 200 hours. The aviation material demand can be calculated according to the above formula. .

[0047] In some embodiments, the method for calculating the aviation material requirement for routine maintenance work based on the usage cycle is as follows:

[0048] Filter out aviation materials related to actual service cycles (such as landing gear components) from routine maintenance work and obtain aviation material requirements using the following method:

[0049] ,in is the proportion of task k in time period T, is the typical runtime of task k, For process The demand for aviation materials related to the actual usage cycle.

[0050] Required quantity of aviation material i in method S100 The range expression is as follows:

[0051] ,in Calculate the required quantity of aviation materials according to calendar time for routine maintenance work. For routine maintenance work, the required quantity of aviation materials is calculated based on the usage time. The required quantity of aviation materials i for routine maintenance work is calculated based on the usage cycle. In order to improve the daily utilization rate of aircraft and reduce the downtime caused by routine maintenance, the three types of routine maintenance work are generally combined; at the same time, for different routine maintenance work based on calendar time, usage time and usage cycle, the aviation material demand is calculated according to calendar time, usage time and usage cycle respectively, and the aviation material demand calculation and deduplication processing are performed (the method is as follows: after replacing aviation materials according to calendar time, the usage time and usage cycle of the replaced aviation materials in the demand of a single aircraft will be cleared; after replacing aviation materials according to usage time, the calendar time and usage cycle of the replaced aviation materials in the demand of a single aircraft will be cleared; after replacing aviation materials according to usage cycle, the calendar time and usage time of the replaced aviation materials in the demand of a single aircraft will be cleared). If routine maintenance and replacement are carried out according to the usage cycle, the corresponding calendar time and usage time will be cleared. Required quantity The range will be within the following range:

[0052] .

[0053] S200, in the time period T, aviation materials corresponding to the installation parts are divided into two categories: those belonging to the MEL list and those not belonging to the MEL list, and the non-routine work demand is calculated. The demand for aviation materials related to replacement is supplemented and the demand for aviation materials for non-routine work is obtained by comprehensive calculation. In some embodiments, when the corresponding installation part of aviation material i belongs to the MEL list, the maintenance and replacement demand calculation expression is as follows:

[0054] ,in is the process of the aircraft material installation and maintenance work card specified in the aircraft maintenance manual; x is the total number of processes of the aircraft material installation and maintenance work card specified in the aircraft maintenance manual; For process The demand quantity of AVIC Materials' installed parts; The expected life of aviation parts.

[0055] When the corresponding installed parts of aviation material i are not included in the MEL list (for economic reasons, they may not be replaced and repaired immediately after the failure, but may be kept until the next maintenance stop), the calculation expression for the demand for maintenance and replacement is as follows:

[0056] ,in The expected lifespan and the nearest time period for aircraft parts (including electronic or mechanical parts) Routine maintenance intervals.

[0057] The preferred method for calculating the expected life of aviation material installation parts of the present invention is as follows:

[0058] The corresponding installed parts of aviation materials are divided into electronic installed parts and mechanical installed parts. If the corresponding installed parts of aviation materials are electronic installed parts (such as electronic instruments, communication equipment, etc.), their failure rate generally follows an exponential distribution. When a failure occurs, they are replaced immediately. The expected life of the installed parts of aviation materials is Directly take the average value according to the mean time between failures (by statistically processing the recorded historical failure data), and the expected life of the aircraft parts at this time The expression is as follows:

[0059] ,in is the failure interval of the nth failure data of aviation material i in the historical failure data, is the total number of failures of aviation material i in the historical failure data.

[0060] If the corresponding parts of the aircraft materials are mechanical parts (such as fuel regulating units, mechanical instruments, switches, etc.), their failure rates generally follow the Weibull distribution. The operating conditions of general aviation aircraft are more complex than those of transport aircraft or other mechanical equipment. In particular, the actual failure rate of some moving mechanical parts is closely related to the operating conditions. If they are replaced immediately after a failure occurs, the expected life of the aircraft materials and parts will be The calculation method is as follows:

[0061] A. Use the three-parameter Weibull distribution to establish the unreliability cumulative function of the corresponding installation part of aviation material i under the condition of use j. :

[0062] ;

[0063] is the current usage time or cycle; It is the shortest historical usage time or cycle under this operating condition; It is the shape parameter of the instantaneous failure rate of the corresponding installed part of aviation material i under the jth type of service condition as a function of service time or cycle; It is a scale parameter that measures the failure rate of the corresponding installed part of aviation material i under type j of operating conditions over the service time or cycle.

[0064] B. Using the failure statistics of the corresponding installation part of aviation material i under the j working condition during historical use, the corresponding shape parameters can be calculated using linear regression. and scale parameters .

[0065] C. In actual application, mechanical parts will not fail when not installed. The calculation is based on the historical inventory time of the corresponding installation parts of aviation material i, but The value of is closely related to the historical failure of the actual aircraft material and its own reliability level. According to the scenario of aircraft material inventory, the following risk matrix is ​​used to determine and The value method of:

[0066]

[0067] In the table above, 0.1, 0.2, 0.5, and 0.632 represent the top 10% lifespan, top 20% lifespan, median lifespan, and characteristic lifespan of the corresponding component in historical data. The corresponding decision-making risk scenarios are ranked from high to low. For example, during critical flight support periods, the top 10% lifespan can be used; in daily operations, the median or average lifespan can be used. Similarly, for newly designed and modified aviation materials, important support missions, or aviation materials with a calendar life, it can be considered that the inventory may fail. =0; for mature aviation materials, non-critical support missions, or common mechanical aviation materials, the minimum, average, or maximum value can be selected from the historical inventory time based on actual needs.

[0068] Will 、 、 ,and Substitution In the formula, we can get .

[0069] Here is an example:

[0070] The failure statistics table of the corresponding installed parts of the aviation material during historical use is as follows:

[0071]

[0072] Use linear regression to calculate the corresponding and Parameter values, assuming and ,but: Since the aviation material is a mechanical part that has been used for many years and will be used for flight training missions in the next year, the risk is relatively low. Therefore, according to the risk evidence, =0.632 and Taken as the average inventory time;

[0073] Will 、 、 and Substituted , find the corresponding t, that is, the expected installed life of the aviation material at the end of the next year Therefore, the quantity of non-routine maintenance materials required for this aircraft in the next year is .

[0074] In method S200, a further preferred technical solution is to supplement the calculation of the demand for associated replacement aircraft materials (when aircraft materials corresponding to installed parts are divided into two categories, those belonging to the MEL list and those not belonging to the MEL list, during the aircraft material replacement and maintenance process, the associated replacement aircraft materials will be supplemented and calculated for these parts). The expression is as follows:

[0075] ,in To trigger the probability of associated replacement of aviation material i, is the current process of replacing maintenance work cards specified in the aircraft maintenance manual, and y is the total number of processes of aircraft material installation maintenance work cards specified in the aircraft maintenance manual; For process The demand quantity of AVIC Materials' installed parts; The expected life span of the associated replacement aviation materials.

[0076] S300, in terms of fleet size Based on this, the required quantity of aviation materials is calculated according to the following expression:

[0077] In some embodiments, in method S300 , high-value turnover materials are screened from among the aviation materials (due to their high value, new materials cannot be purchased unlimitedly based on actual demand in order to improve the economic efficiency of aviation material inventory management; therefore, the demand quantity of such high-value turnover materials needs to be adjusted considering the repair cycle and repairability of faulty aircraft materials). The demand for high-value turnover materials is adjusted according to the following expression:

[0078] , It indicates that the demand correction result of aviation material i is a high-value turnover aviation material. The expected installed life of aviation material i is a high-value turnover aviation material. Indicates that the repair cycle of aviation material i is a high-value turnover aviation material. It indicates the probability of scrapping of aviation material i, which is a high-value turnover aviation material (taking into account the possibility of aviation material being scrapped during actual use). The number of aviation materials caused by scrapping needs to be rounded up. is the risk factor (value not less than 1). After considering high-value turnover materials, the fleet size is added. The demand quantity of aviation material i is expressed as follows: , thereby calculating the required quantity of all aviation materials, which serves as the data support for the airport's aviation material inventory control.

[0079] A civil aviation material inventory support and control system for implementing a civil aviation material inventory support and control method includes a routine work demand calculation module, a non-routine work measurement module, and a superimposed fleet-scale material demand calculation module. The routine work demand calculation module is used to calculate the material demand based on calendar time, usage time, and usage cycle of routine maintenance work in the future time period T, and comprehensively calculate the required quantity of material i. The non-routine work measurement module is used to divide the corresponding parts of the aviation materials into two categories: those belonging to the MEL list and those not belonging to the MEL list in the time period T, and perform non-routine work demand calculation and supplement the calculation of the related replacement aviation materials demand, and comprehensively calculate the aviation materials demand for non-routine work The superimposed fleet size aviation material demand calculation module is in the superimposed fleet size Based on this, the required quantity of aviation materials is calculated according to the following expression: .

[0080] An electronic device comprises at least one processor, at least one memory, and a data bus; wherein: the processor and the memory communicate with each other via the data bus; the memory stores program instructions executed by the processor, and the processor calls the program instructions to execute the steps of the civil aviation material inventory guarantee control method of the present invention.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for managing and controlling inventory of civil aviation materials, characterized by: The methods include: S100: Calculate the aviation material demand based on calendar time, usage time, and usage cycle based on routine maintenance work in the future time period T, and calculate the demand quantity of aviation material i through comprehensive calculation. The method for calculating the aviation material demand for routine maintenance work by calendar time is as follows: Filter the aviation materials related to the calendar time from routine maintenance work and obtain the aviation material demand according to the following method: , where m is the routine card number in the routine maintenance work package, n is the total number of routine cards in the routine maintenance work package, The time interval for routine maintenance work of a single card m, is the process number of routine card m, is the total number of processes for a routine card m, For process The demand for aviation materials related to calendar time; The method for calculating the aviation material demand for routine maintenance work based on the actual use time is as follows: Select the aviation materials related to the actual use time from routine maintenance work and obtain the aviation material demand according to the following method: , is the expected daily utilization rate; is the running time ratio, For process The demand for aviation materials related to actual usage time, The time interval between routine maintenance work of aviation materials related to routine single card m and actual use time; The method for calculating the aviation material demand based on the use cycle of routine maintenance work is as follows: Select the aviation materials related to the actual use cycle from routine maintenance work and obtain the aviation material demand according to the following method: ,in is the proportion of task k in time period T, is the typical runtime of task k, For process The demand for aviation materials related to the actual use cycle; S200: During the time period T, aviation materials corresponding to the installed parts are divided into two categories: those belonging to the MEL list and those not belonging to the MEL list, and the demand for non-routine work is calculated; the demand for aviation materials related to replacement is supplemented, and the demand for aviation materials for non-routine work is obtained by comprehensive calculation. ; S300, in terms of fleet size Based on this, the required quantity of aviation materials is calculated according to the following expression: 。 2. The method for managing and controlling the inventory of civil aviation materials according to claim 1, characterized in that: In method S300, high-value turnover aviation materials are screened, and the demand for high-value turnover aviation materials is modified according to the following expression: , It indicates that the demand correction result of aviation material i is a high-value turnover aviation material. The expected installed life of aviation material i is a high-value turnover aviation material. Indicates that the repair cycle of aviation material i is a high-value turnover aviation material. It indicates the scrap probability of aviation material i being a high-value turnover aviation material, is the risk factor.

3. The method for managing and controlling the inventory of civil aviation materials according to claim 1, characterized in that: Required quantity of aviation materials i The range expression is as follows: ,in Calculate the required quantity of aviation materials according to calendar time for routine maintenance work. For routine maintenance work, the required quantity of aviation materials is calculated based on the usage time. For routine maintenance work, the required quantity of aviation materials is calculated based on the usage cycle.

4. The method for managing and controlling the inventory of civil aviation materials according to claim 1, characterized in that: When the corresponding installed parts of aviation material i belong to the MEL list, the calculation expression of maintenance and replacement demand is as follows: ,in is the process of the aircraft material installation and maintenance work card specified in the aircraft maintenance manual; x is the total number of processes of the aircraft material installation and maintenance work card specified in the aircraft maintenance manual; For process The demand quantity of AVIC Materials' installed parts; The expected life of the aircraft parts installed; When the corresponding installed parts of aviation material i are not included in the MEL list, the calculation expression for the maintenance and replacement demand is as follows: ,in Expected life and nearest time period of aviation parts installation Routine maintenance intervals.

5. The method for managing and controlling the inventory of civil aviation materials according to claim 1 or 4, characterized in that: The expression for the supplementary calculation of the aviation material demand for associated replacement is as follows: ,in To trigger the probability of associated replacement of aviation material i, is the current process of replacing maintenance work cards specified in the aircraft maintenance manual, and y is the total number of processes of aircraft material installation maintenance work cards specified in the aircraft maintenance manual; For process The demand quantity of AVIC Materials' installed parts; The expected life span of the associated replacement aviation materials.

6. A civil aviation material inventory support and control system that implements the civil aviation material inventory support and control method of claim 1, characterized in that: It includes a routine work demand calculation module, a non-routine work measurement module and a superimposed fleet-scale aviation material demand calculation module. The routine work demand calculation module is used to calculate the aviation material demand based on calendar time, usage time and usage cycle of routine maintenance work in the future time period T and comprehensively calculate the required quantity of aviation material i. The non-routine work measurement module is used to divide the corresponding parts of the aviation materials into two categories: those belonging to the MEL list and those not belonging to the MEL list in the time period T, and perform non-routine work demand calculation and supplement the calculation of the related replacement aviation materials demand, and comprehensively calculate the aviation materials demand for non-routine work The superimposed fleet size aviation material demand calculation module is in the superimposed fleet size Based on this, the required quantity of aviation materials is calculated according to the following expression: .

7. An electronic device, characterized in that: The method comprises at least one processor, at least one memory and a data bus; wherein: the processor and the memory communicate with each other via the data bus; the memory stores program instructions executed by the processor, and the processor calls the program instructions to execute the steps of the method according to any one of claims 1 to 5.

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