A two-level maintenance support system and method for military internet of things

Abstract

The present application belongs to the technical field of equipment maintenance support, in particular to a two-level maintenance support system and method for military Internet of Things. The present application comprises a low-orbit satellite Internet of Things of 5G mobile communication technology system, a satellite measurement and control feeder link, a satellite AMF / SMF / UPF module, a low-power wireless wide area network, a gNB base station, a military information network, a support object terminal, a support terminal, a maintenance resource configuration module, and a power supply module of each device and module. Through the operation of the system, end-to-end human, process, data and Internet of Things network connection can be realized in the field environment of cross-regional joint operations, information collection, transmission and interaction of sensing and response of maintenance requirements can be realized, and optimization response of multiple task demand conflicts can be realized according to the method of sensing and responding to maintenance support tasks of the two-level maintenance support system.

Description

[0001] This invention relates to the field of equipment maintenance and support technology, and in particular to a two-level maintenance and support system and method for military Internet of Things.

[0002] Currently, the Internet of Things (IoT) is experiencing a strong rise. The most priority and core issue in the military application of IoT is how to integrate it into joint operations and their support systems while meeting military needs, thereby effectively enhancing combat capabilities and support efficiency. Demand-driven development is the primary force behind the growth of various new technologies. With the potential applications of IoT in the military field, especially driven by the strong demands of joint operations on the informationized battlefield, the construction of IoT is becoming increasingly urgent. The core of military IoT focuses on factors such as battlefield situational awareness, intelligent analysis and judgment, and action process control, enabling the system to operate effectively in all directions, across all time domains, and across the entire spectrum, thereby comprehensively enhancing the system-of-systems combat capabilities based on information systems. Maintenance support for military IoT aims to achieve precise battlefield perception from sensors to maintenance support resources, that is, to establish a comprehensive IoT system encompassing all elements and processes, including dynamic battlefield perception, data acquisition and transmission, optimized decision-making, support resource allocation, and scheduling.

[0003] With the development of intelligent equipment, it has become possible to build an equipment perception and control network system to dynamically perceive and statistically analyze the equipment's location, mission, damage, maintenance, and scrapping status throughout its entire life cycle. A two-tiered maintenance support system for military IoT needs to be established, encompassing support requirements, spare parts planning and maintenance, and support delivery "from equipment to support points," to optimize the timely, appropriate, and sufficient comprehensive utilization of maintenance support resources.

[0004] For the military Internet of Things (IoT), existing equipment maintenance and support methods and systems face the following problems:

[0005] 1. The existing multi-support point equipment maintenance and support methods mainly rely on manual reporting of maintenance tasks and maintenance resource requirements. The reporting is untimely, inaccurate, involves multiple levels, and is greatly affected by human factors, which seriously restricts the realization of system maintenance efficiency. With the gradual realization of military Internet of Things and IoT information channels, it is necessary to optimize the allocation of maintenance resources with the goal of optimizing overall combat capability and support efficiency.

[0006] 2. For military IoT, especially in field combat environments, existing equipment maintenance and support systems cannot achieve end-to-end network connectivity of people, processes, data, and the Internet of Things (IoT). The links are open-loop, and the perception of edge data at the implementation layer required for equipment maintenance and support is not achieved. Equipment maintenance and support cannot yet achieve the interconnection of everything required for the construction of military IoT.

[0007] 3. The existing equipment maintenance and support data collection and verification are done manually, lacking automatic collection capabilities, resulting in poor timeliness and accuracy. In particular, when the equipment maintenance and support system responds to maintenance task requirements, it cannot accurately locate physical faults and obtain the information required for support in the first instance through self-sensing.

[0008] 4. Currently, there is no established "Situation Identification (SID)" system for equipment support based on support needs and capabilities, using multiple sensors or integrated sensors. This system is not yet capable of providing state awareness of the location, distribution and aggregation sites, movement status, and service life of the supported objects, as well as their integrity rate and maintenance status. This would enable macro-monitoring and management of the two-level maintenance support system for military IoT applications. Summary of the Invention

[0009] The technical problem to be solved by this invention is: To meet the needs of two-level maintenance support for military IoT, how to achieve a method for sensing and responding to maintenance support tasks based on support needs or capabilities as standards and optimization goals, according to the maintenance support capability perception and response methods of the two-level maintenance support system, and to establish an "Equipment Support SID (Situation Identification)" identification system with multiple sensors or integrated sensors corresponding to each maintenance support task. This will enable the unique identification of maintenance objects that meet the requirements of military IoT in special application environments under mobile conditions, and achieve the ability to identify the geographical location of maintenance support objects and exchange maintenance resource demand information to adapt to the needs of field environments.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention provides a two-level maintenance support system for military Internet of Things (IoT), including: a low-orbit satellite IoT based on 5G mobile communication technology (1), a satellite telemetry and control power supply link (2), a satellite AMF / SMF / UPF module (3), a low-power wireless wide area network (4), a gNB base station (5), a military information network (6), a support object terminal (7), a support terminal (8), a maintenance resource configuration module (9), and a power supply module (10) for each device and module. The support object terminal (7) includes a military RFID tag (11), an electronic tag reader (12), a sensor (13), a Beidou positioning module (14), and an edge computing box (15). The support terminal (8) includes a military radio frequency tag (16) and an electronic tag reader (17). The maintenance resource configuration module (9) includes a server (18) and a display terminal module (19). The electronic tag reader (12), sensor (13), and Beidou positioning module (14) are connected to the edge computing box (15) through a communication link. The low-orbit satellite Internet of Things (1) of the 5G mobile communication technology system is connected to the military information network (6) through the gNB base station (5). The low-power wireless wide area network (4) is connected to the military information network (6) and is connected to the electronic tag reader (20).

[0011] Furthermore, the low-power wireless wide area network (4) is an NB-IoT and / or LoRa network.

[0012] Furthermore, the server (18) includes a GIS server, a maintenance and support ledger data server, a military radio frequency tag management server, and a maintenance resource configuration management server.

[0013] Furthermore, the sensor (13) is one or more of the following: pressure sensor, temperature sensor, flow sensor, gas concentration sensor, speed sensor, position sensor, and light intensity sensor.

[0014] Furthermore, the maintenance and support ledger data server includes a maintenance and support spare parts data module, a maintenance and support personnel data module, a maintenance and support equipment data module, and a maintenance and support record data module.

[0015] Furthermore, the military RFID management server includes a maintenance and support spare parts ID data module, a maintenance and support personnel ID data module, a maintenance and support transport equipment ID data module, and a maintenance and support object ID data module.

[0016] Furthermore, the maintenance resource configuration management server includes an information push / notification SDK module, a data acquisition and reception service module, a data storage service module, a user registration service module, a maintenance support spare parts basic information data module, a maintenance support personnel basic information data module, a user permission hierarchical management service module, a maintenance support transport equipment data module, a maintenance support object basic information data module, and an event-triggered workflow maintenance support service module.

[0017] A method for the aforementioned two-level maintenance support system for military IoT includes the following implementation steps:

[0018] Step S1: Establish a topology wiring diagram, which is a normal display of the end-to-end physical link status diagram. It is used for centralized visualization of the end-to-end physical link status of the military IoT two-level maintenance support system. According to the needs of maintenance support tasks and the supply of maintenance resources, establish the correspondence between physical maintenance resources and maintenance task information. Determine the working status of the maintenance resource end according to the data information table and distinguish them with different colors to realize centralized visualization of the end-to-end physical link status.

[0019] Step S2: Establish a maintenance spare parts information table, including RFID information field, maintenance spare parts usage status information field, maintenance spare parts type field, and maintenance spare parts storage information field.

[0020] Step S3: Establish a basic information table for maintenance personnel, including RFID information field, maintenance personnel work status information field, maintenance personnel professional category information field, and maintenance personnel subordinate technical level type information field.

[0021] Step S4: Establish a basic information table for maintenance equipment, including RFID information field, maintenance equipment usage status information field, and maintenance equipment type information field;

[0022] Step S5: Establish a maintenance task requirement information table. The sensor transmits the detected equipment anomaly information to the edge computing box, which then determines the resources required for the maintenance task, including RFID information field, maintenance spare parts type field, maintenance spare parts quantity field, maintenance personnel professional category information segment, maintenance personnel subordinate technical level type information segment, maintenance personnel quantity field, maintenance equipment type information segment, and maintenance equipment quantity information segment.

[0023] Step S6: Establish the objective equation. Based on the maintenance task requirements, the collection of fault and status information, and the working methods of manual, periodic, timed, and event-based maintenance, establish the objective equation that maximizes the assurance level under limited resources.

[0024] (1)

[0025] in, , For the first Class resources in the Consumption coefficient in maintenance and support tasks As a resource matching efficiency factor, For equivalent resource usage, The cost threshold for each maintenance and support task. The total cost threshold, To ensure the reliability of various maintenance and support tasks, For maintenance and support tasks;

[0026] Step S7: Calculate the cost-effectiveness ratio based on the ratio of the maintenance support task cost threshold to the maintenance support task support level. Cost-effectiveness ratio;

[0027] Step S8: Sort the maintenance and support tasks in descending order according to their cost-effectiveness ratio. Sort in descending order, denoted as . , The task set is arranged in descending order;

[0028] Step S9: Assign values ​​according to the descending order of the task set. The various maintenance and support tasks in the system are assigned values ​​starting from item 1;

[0029] Step S10: Determine the termination condition for total resource supply, and determine the total resource demand. If... ,but , ;otherwise , ;

[0030] Step S11, determine the termination condition for a single task, when Stop output when Otherwise, return to step S9;

[0031] Step S12, encode the task set, and then... Transform into A binary string, as a group of individuals, has a gene code of 1 indicating that the corresponding maintenance and support task has been responded to, and a gene code of 0 indicating that the corresponding maintenance and support task has not been responded to.

[0032] Step S13: Generate an initial population and determine the population size. pop_size Within the range of values ​​for the independent variable, an initial population is generated using uniformly random numbers. popIndividuals in the initial population that do not meet the total cost threshold constraint are modified. The total cost threshold required for each chromosome is calculated. For each chromosome that exceeds the total cost threshold, the bits with a value of 1 are set to 0 starting from the last bit. The cost threshold required for the maintenance and support task is subtracted from the total cost threshold until the constraint is met.

[0033] Step S14, calculate the fitness of the individual:

[0034] (2)

[0035] Step S15: Assign selection probabilities by matching the fitness value of each individual with... Comparing the obtained fitness values, individuals with fitness values ​​greater than 1 have a selection probability of 1, while the maximum fitness value of an individual in this generation is less than 1. The obtained fitness value is used The obtained solution replaces the individual and is assigned a selection probability of 1. The remaining individuals are assigned selection probabilities according to their fitness values.

[0036] Step S16: Select the appropriate operator, perform calculations on the individuals in the population, determine the constraints, and delete individuals that do not meet the resource constraints.

[0037] Step S17: Add individuals to meet resource constraints and maintain the initial population size for the offspring population.

[0038] Step S18: Determine the termination condition; if the optimal solution is not identical for 20 consecutive generations, or... ,make ,in For algebra, If the maximum number of generations is reached, proceed to step S14; otherwise, stop the calculation and use the individual with the highest fitness in a certain generation as the final solution.

[0039] Further, in step S161, the applicable operator is selected as the selection operator, and the selection operation is performed on the individuals in the population according to the selection probability.

[0040] Further, in step S162, the applicable operator is selected as the crossover operator, and crossover operation is performed on the individuals in the population according to the crossover probability.

[0041] Further, in step S163, the applicable operator is selected as the mutation operator, and the mutation operation is performed on the individuals in the population according to the mutation probability.

[0042] Further, in step S164, the applicable operator is selected as the modification operator, and the infeasible sub-individuals are modified according to the decoding rules.

[0043] Furthermore, in step S16, the applicable operator is a combination of 2 to 4 of the above operators;

[0044] Compared with the prior art, the present invention has the following significant advantages:

[0045] 1. This invention provides a method for military Internet of Things that optimizes the response to maintenance and support tasks by maximizing the availability (combat readiness rate) and using a two-level maintenance and support system. This method can achieve optimized response when there are conflicting demands for multiple tasks.

[0046] 2. This invention realizes a two-level maintenance support system "from equipment to support point", which can complete the end-to-end network connection of people, processes, data and materials in the field combat environment.

[0047] 3. This invention constructs an "Equipment Maintenance and Support SID (Situation Identification)" identification system based on multiple sensors or integrated sensors, with support requirements and support capabilities as the standard and guide. It can realize status perception according to the support capabilities of a two-level maintenance and support system.

[0048] 4. This invention uses military radio frequency tags to uniquely identify maintenance and support spare parts, maintenance and support personnel, maintenance and support transport equipment, and maintenance and support objects in the maintenance and support system. By combining GIS and Beidou systems to identify the geographical location of the maintenance objects, it can achieve accurate and rapid location and visualization of fault detection and maintenance and support. Attached Figure Description

[0049] Figure 1 Connection diagram of a two-level maintenance support system for military IoT

[0050] Figure 2 Connection diagram of each module of the maintenance and support object

[0051] Figure 3 Maintenance resource configuration module connection diagram

[0052] Figure 4 Flowchart of a two-tier maintenance support method for military IoT Detailed Implementation

[0053] The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0054] According to one embodiment of the present invention, in combination Figure 1 , 2 The present invention provides a two-level maintenance support system for military Internet of Things (IoT), comprising: a low-orbit satellite IoT system based on multiple 5G mobile communication technologies (1), a satellite telemetry and control power supply link (2), a satellite AMF / SMF / UPF module (3), a low-power wireless wide area network (4), a gNB base station (5), a military information network (6), a support target terminal (7), a support terminal (8), a maintenance resource configuration module (9), and a power supply module (10) for each device and module. The support target terminal (7) includes a military RFID tag (11), an electronic tag reader (12), a sensor (13), a Beidou positioning module (14), and an edge computing box. The military IoT support terminal (8) includes a military RFID tag (16) and an electronic tag reader (17). The maintenance resource configuration module (9) includes a server (18) and a display terminal module (19). The electronic tag reader (12), sensor (13), and Beidou positioning module (14) are connected to the edge computing box (15) via a communication link. The low-orbit satellite IoT (1) of the 5G mobile communication technology system is connected to the military information network (6) via a gNB base station (5). The low-power wireless wide area network (4) is connected to the military information network (6) and is connected to an electronic tag reader (20).

[0055] The support terminal (8) uses an electronic tag reader (20) to detect the RFID tags of the maintenance support spare parts in stock, the maintenance support equipment on standby, and the maintenance support personnel on standby, and transmits the information to the maintenance resource configuration module (9). It also identifies the types and quantities of maintenance support spare parts, maintenance support equipment, and maintenance support personnel required for the maintenance tasks that can be responded to by the two-level maintenance support, generates a maintenance support code, and transmits it to the maintenance resource configuration module (9). The support target terminal (7) includes a military RFID tag (11), an electronic tag reader (12), a sensor (13), a Beidou positioning module (14), and an edge computing box (15). The electronic tag reader (12), sensor (13), and Beidou positioning module (14) are connected to the edge computing box (15) via a communication link. The sensor (13) transmits the detected signal to the edge computing box (15), which determines whether the fault threshold has been reached, determines the type and quantity of maintenance support spare parts, maintenance support equipment, and maintenance support personnel, and generates a maintenance support code. This code is consistent with the encoding method of the maintenance support code generated by the maintenance resource configuration module (9). The edge computing box (15) reads the location information of the Beidou positioning module (14) and writes the location information and support code into the military radio frequency tag (11) through the electronic tag reader (12). The communication module built into the edge computing box (15) is compatible with LoRa, NB-IoT, Sat LoRa, and Sat NB-IoT, and supports simultaneous access to satellite and ground networks. When both satellite and ground access conditions exist, the ground network is selected first. It is then linked to the military information network (6) and transmitted to the maintenance resource configuration module (9). When the maintenance support codes match, the two-level maintenance support system will respond to the maintenance support task; otherwise, it will not respond.

[0056] According to one embodiment of the present invention, combined with Figure 3 This utility model discloses a two-level maintenance support system for military Internet of Things applications. The server (18) includes a GIS server, a maintenance support ledger data server, a military RFID tag management server, and a maintenance resource allocation management server.

[0057] According to one embodiment of the present invention, in combination Figure 4 The present invention provides a two-level maintenance support method for military Internet of Things (IoT) applications, comprising the following steps:

[0058] Step S1: Establish a topology wiring diagram, which is a normal end-to-end physical link status diagram. It is used for centralized visualization of the end-to-end physical link status of the military IoT two-level maintenance support system. According to the needs of maintenance support tasks and the supply of maintenance resources, establish the correspondence between physical maintenance resources and maintenance task information. Determine the working status of the maintenance resource end according to the data information table. When the status is normal, the link is displayed in green, and when the status is abnormal, the link is displayed in red.

[0059] Step S2: 64-bit RFID information field, 1-bit maintenance spare parts usage status information field, 4-bit maintenance spare parts type field, and 4-bit maintenance spare parts storage information field.

[0060] Step S3: Establish a basic information table for maintenance personnel, including: a 64-bit RFID information field, a 1-bit maintenance personnel work status information field, a 4-bit maintenance personnel professional category information field, and a 4-bit maintenance personnel subordinate technical level type information field.

[0061] Step S4: Establish a basic information table for the maintenance equipment, including: a 64-bit RFID information field, a 1-bit maintenance equipment usage status information field, and a 4-bit maintenance equipment type information field.

[0062] Step S5: Establish a maintenance task requirement information table. The sensor transmits the detected equipment anomaly information to the edge computing box. The edge computing box determines the resources required for the maintenance task, including a 64-bit RFID information field, a 4-bit maintenance spare parts type field, a 4-bit maintenance spare parts quantity field, a 4-bit maintenance personnel professional category information field, a 4-bit technical level type information field under the maintenance personnel, a 4-bit maintenance personnel quantity field, a 4-bit maintenance equipment type information field, and a 4-bit maintenance equipment quantity information field.

[0063] Step S6: Establish the objective equation. Based on maintenance task requirements, fault and status information collection, and the work methods of manual, periodic, timed, and event-based operations, establish the objective equation that maximizes the availability (combat readiness rate) under limited support resources.

[0064] (3)

[0065] in, , The cost threshold for each maintenance and support task. The total cost threshold, To ensure the reliability of various maintenance and support tasks, For maintenance and support tasks;

[0066] Step S7: Calculate the cost-effectiveness ratio by calculating the ratio of the maintenance support task cost threshold to the maintenance support task support level. ;

[0067] Step S8: Sort the maintenance and support tasks in descending order according to their cost-effectiveness ratio. Sort in descending order, denoted as . , The task set is arranged in descending order;

[0068] Step S9: Assign values ​​according to the descending order of the task set. The various maintenance and support tasks in the system are assigned values ​​starting from item 1;

[0069] Step S10: Determine the termination condition for the total resource amount. If ,but , ;otherwise , ;

[0070] Step S11, determine the termination condition for a single task, when Stop output when Otherwise, return to step S9;

[0071] Step S12, encode the task set, and Transform into A binary string, as a group of individuals, a gene code of 1 indicates that the corresponding task is selected, and a gene code of 0 indicates that the corresponding task is not selected;

[0072] Step S13: Generate an initial population and determine the population size. pop_size To generate an initial population of 60, uniform random numbers are used to generate the initial population within the range of values ​​for the independent variable. pop Individuals in the initial population that do not meet the total cost threshold constraint are modified. The total cost threshold required for each chromosome is calculated. For each chromosome that exceeds the total cost threshold, the bits with a value of 1 are set to 0 starting from the last bit. The cost threshold required for the maintenance and support task is subtracted from the total cost threshold until the constraint is met.

[0073] Step S14, calculate the fitness of the individual:

[0074] (4)

[0075] Step S15: Assign selection probabilities by matching the fitness value of each individual with... Comparing the obtained fitness values, individuals with fitness values ​​greater than 1 have a selection probability of 1, while the maximum fitness value of an individual in this generation is less than 1. The obtained fitness value is used The obtained solution replaces the individual and is assigned a selection probability of 1. The remaining individuals are assigned selection probabilities according to their fitness values.

[0076] Step S16: Select the appropriate operators as the selection operator, crossover operator, and mutation operator;

[0077] Step S161: Select the appropriate operator as the selection operator with a selection probability of 0.9, and perform the selection operation on the population;

[0078] Step S162: Select the appropriate operator as the crossover operator with a crossover probability of 0.8, and perform the crossover operation on the individuals in the population.

[0079] Step S163: Select the appropriate operator as the mutation operator with a mutation probability of 0.5, and perform mutation operation on the individuals in the population.

[0080] Step S17: Add new individuals that meet the resource constraints to maintain the size of the initial population in the offspring population.

[0081] Step S18: Determine the termination condition; if the optimal solution is not identical for 100 consecutive generations, or... ,make Proceed to step S14 if necessary, otherwise proceed to step S19, stop the calculation, and obtain the result. This is the final solution.

[0082] The above embodiments are provided merely for the purpose of describing the present invention and are not intended to limit the scope of the invention. All equivalent substitutions and modifications made without departing from the spirit and principles of the invention should be covered within the scope of the invention.

Claims

1. A two-level maintenance support method for military Internet of Things, characterized in that, Includes the following steps: Step S1: Establish a topology wiring diagram, which is a normal display of the end-to-end physical link status diagram. It is used for centralized visualization of the end-to-end physical link status of the military IoT two-level maintenance support system. According to the needs of maintenance support tasks and the supply of maintenance resources, establish the correspondence between physical maintenance resources and maintenance task information. Determine the working status of the maintenance resource end according to the data information table and distinguish them with different colors to realize centralized visualization of the end-to-end physical link status. Step S2: Establish a maintenance spare parts information table, including RFID information field, maintenance spare parts usage status information field, maintenance spare parts type field, and maintenance spare parts storage information field. Step S3: Establish a basic information table for maintenance personnel, including RFID information field, maintenance personnel work status information field, maintenance personnel professional category information field, and maintenance personnel subordinate technical level type information field. Step S4: Establish a basic information table for maintenance equipment, including RFID information field, maintenance equipment usage status information field, and maintenance equipment type information field; Step S5: Establish a maintenance task requirement information table. The sensor transmits the detected equipment anomaly information to the edge computing box, which then determines the resources required for the maintenance task, including RFID information field, maintenance spare parts type field, maintenance spare parts quantity field, maintenance personnel professional category information segment, maintenance personnel subordinate technical level type information segment, maintenance personnel quantity field, maintenance equipment type information segment, and maintenance equipment quantity information segment. Step S6: Establish the objective equation. Based on the maintenance task requirements, the collection of fault and status information, and the working methods of manual, periodic, timed, and event-based maintenance, establish the objective equation that maximizes the assurance level under limited resources. （1） in, , For the first Class resources in the Consumption coefficient in maintenance and support tasks As a resource matching efficiency factor, For equivalent resource usage, The cost threshold for each maintenance and support task. The total cost threshold, To ensure the reliability of various maintenance and support tasks, For maintenance and support tasks; Step S7, calculating the cost-effectiveness ratio according to the ratio of the maintenance support task support degree and the maintenance support task cost threshold is the cost-effectiveness ratio; Step S8, arranging the maintenance support tasks in descending order of cost-effectiveness ratio, denoted as , is the task set arranged in descending order.​ Step S9, assign each maintenance support task in the descending task set order, starting from the first one in the list in Table 1. in descending order of the task set order. Step S10: Determine the termination condition for total resource quantity, and determine the total resource demand. If... ,but , ;otherwise , ; Step S11, determine the termination condition for a single task, when Stop output when Otherwise, return to step S9; Step S12, encode the task set, and Transform into A binary string, as a group of individuals, has a gene code of 1 indicating that the corresponding maintenance and support task has been responded to, and a gene code of 0 indicating that the corresponding maintenance and support task has not been responded to. Step S13: Generate an initial population and determine the population size. pop_size Within the range of values ​​for the independent variable, an initial population is generated using uniformly random numbers. pop Individuals in the initial population that do not meet the total cost threshold constraint are modified. The total cost threshold required for each chromosome is calculated. For each chromosome that exceeds the total cost threshold, the bits with a value of 1 are set to 0 starting from the last bit. The cost threshold required for the maintenance and support task is subtracted from the total cost threshold until the constraint is met. Step S14, calculate the fitness of the individual: （2） Step S15: Assign selection probabilities by matching the fitness value of each individual with... Comparing the obtained fitness values, individuals with fitness values ​​greater than 1 have a selection probability of 1, while the maximum fitness value of an individual in this generation is less than 1. The obtained fitness value is used The obtained solution replaces the individual and is assigned a selection probability of 1. The remaining individuals are assigned selection probabilities according to their fitness values. Step S16: Select the appropriate operator, perform calculations on the individuals in the population, determine the constraints, and delete individuals that do not meet the resource constraints. Step S17: Add individuals to meet resource constraints and maintain the initial population size for the offspring population. Step S18: Determine the termination condition; if the optimal solution is not identical for 20 consecutive generations, or... ,make ,in For algebra, If the maximum number of generations is reached, proceed to step S14; otherwise, stop the calculation and use the individual with the highest fitness in a certain generation as the final solution.

2. The two-level maintenance support method for military IoT as described in claim 1, characterized in that, In step S16, an applicable operator is selected as the selection operator, and the selection operation is performed on the individuals in the population according to the selection probability.

3. The two-level maintenance support method for military IoT as described in claim 1, characterized in that, In step S16, the appropriate operator is selected as the crossover operator, and crossover operations are performed on individuals in the population according to the crossover probability.

4. The two-level maintenance support method for military IoT as described in claim 1, characterized in that, In step S16, the appropriate operator is selected as the mutation operator, and the mutation operation is performed on the individuals in the population according to the mutation probability.

5. The two-level maintenance support method for military IoT as described in claim 1, characterized in that, In step S16, an applicable operator is selected as the modification operator, and the infeasible sub-individuals are modified according to the decoding rules.

6. The two-level maintenance support method for military IoT according to claim 1, characterized in that, In step S16, the applicable operator is a combination of 2 to 4 operators among the selection operator, crossover operator, mutation operator, and modification operator.

7. A two-level maintenance support system for military IoT, used to execute the two-level maintenance support method for military IoT as described in any one of claims 1-6, characterized in that, The system includes: a low-orbit satellite IoT based on 5G mobile communication technology, a satellite telemetry and control power supply link, satellite AMF / SMF / UPF modules, a low-power wireless wide area network, a gNB base station, a military information network, support terminals, support terminals, and a maintenance resource configuration module, as well as power supply modules for each device and module. The support terminals include military RFID tags, electronic tag readers, sensors, BeiDou positioning modules, and edge computing boxes. The military IoT support terminals include military RFID tags and electronic tag readers. The maintenance resource configuration module includes a server and a display terminal module. The electronic tag readers, sensors, and BeiDou positioning modules are connected to the edge computing box via a communication link. The low-orbit satellite IoT based on 5G mobile communication technology is connected to the military information network via a gNB base station. The low-power wireless wide area network is connected to the military information network and is also connected to an electronic tag reader.

8. A two-level maintenance support system for military IoT as described in claim 7, characterized in that... The low-power wireless wide area network mentioned is NB-IoT and / or LoRa network.

9. A two-level maintenance support system for military IoT as described in claim 7, characterized in that... The server includes a GIS server, a maintenance and support ledger data server, a military RFID tag management server, and a maintenance resource allocation management server.

10. A two-level maintenance support system for military IoT as described in claim 7, characterized in that... The sensor is one or more of the following: pressure sensor, temperature sensor, flow sensor, gas concentration sensor, speed sensor, position sensor, and light intensity sensor.

11. A two-level maintenance support system for military IoT as described in claim 9, characterized in that... The maintenance and support ledger data server includes a maintenance and support spare parts data module, a maintenance and support personnel data module, and a maintenance and support record data module.

12. A two-level maintenance support system for military IoT as described in claim 9, characterized in that... The military RFID management server includes a maintenance and support spare parts ID data module, a maintenance and support personnel ID data module, a maintenance and support transport equipment ID data module, and a maintenance and support object ID data module.

13. A two-level maintenance support system for military IoT as described in claim 9, characterized in that... The maintenance resource configuration management server includes an information push / notification SDK module, a data acquisition and reception service module, a data storage service module, a user registration service module, a maintenance support spare parts basic information data module, a maintenance support personnel basic information data module, a user permission hierarchical management service module, a maintenance support transport equipment data module, a maintenance support object basic information data module, and an event-triggered workflow maintenance support service module.

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