CN117729121A - A collaborative simulation system based on optical fiber ad hoc network - Google Patents

Abstract

The invention relates to a collaborative simulation system based on an optical fiber ad hoc network, belongs to the field of aircraft simulation, and solves the problem that an address allocation error is easy to generate in a networking mode of the existing simulation system, so that the simulation system operates data errors in a real-time data interaction process. The system comprises N simulation nodes communicated through optical fibers, wherein the simulation nodes consist of simulation computers and optical fiber reflecting plate cards; the simulation computer includes: the task planning module is used for analyzing and planning the simulation task; the calculation and control module is used for calculating the simulation model and generating decision information according to a calculation result; the data management module is used for generating external interaction data of the simulation node; the networking communication module is used for realizing optical fiber ad hoc network and providing a real-time data interaction channel for the simulation system; the optical fiber reflecting board card is connected with the reflecting memory hub. Frequent setting and maintenance of the fiber address are avoided in the simulation process, and real-time data interaction of the simulation system is guaranteed.

Description

A collaborative simulation system based on optical fiber ad hoc network

Technical field

The invention relates to the field of aircraft simulation, and in particular to a collaborative simulation system based on optical fiber ad hoc network.

Background technique

Aircraft clusters have the advantages of flexible organization, low cost, and high resilience. They are widely used in many fields, including air traffic management, search and rescue, tactical operations, logistics and transportation, etc. When aircraft clusters perform these tasks, multiple aircraft interact with each other. Collaborative work is necessary. The advantages of multiple aircraft working together are: it can improve the efficiency and speed of mission execution, increase the flexibility of execution methods to adapt to different mission requirements, avoid mutual interference and collision to improve the safety and efficiency of air traffic, and can cover a larger area area to perform a wider range of tasks, etc. The actual aircraft collaborative control system mainly includes functions such as pre-launch collaborative mission planning, collaborative detection and anti-interference, online situation awareness, online collaborative decision-making and planning, collaborative guidance control, networking communications, intelligent computing, and collaborative effectiveness evaluation. Before the aircraft control system is applied, the collaborative simulation system can be used to verify the performance of the constructed aircraft collaborative control system. Compared with the experimental simulation method, the collaborative simulation system can replace key equipment such as data links and satellites in the actual system, and is low-cost and Easy to implement. The optical fiber reflective memory network is formed by connecting several optical fiber reflective boards through optical fiber and other transmission media. It has the advantages of high-speed transmission, high bandwidth, low delay, strong anti-interference ability, suitable for long-distance transmission, energy saving and environmental protection. It is very suitable for applications that require a large number of An aircraft collaborative simulation system with data interaction and high real-time requirements.

In order to ensure the interaction and real-time sharing of large amounts of data during the operation of the collaborative simulation system, it is first necessary to plan the address of the optical fiber reflective board in each simulation node. At present, two methods are usually used for address planning of optical fiber reflective boards. One is manual address allocation, that is, pre-allocating a placeholder address for each optical fiber reflective board. However, the disadvantage of this method is that when the optical fiber reflective board is used in the network, When the quantity is large, or the structure and data structure of the semi-physical simulation system are changeable, manual address allocation can easily lead to operational errors, resulting in irreversible errors; the second is automatic address allocation, that is, according to each optical fiber reflector The order in which the cards are added to the network enables each fiber optic reflective board to seize the address in turn. However, this method still has the following problems: Since the startup interval of each fiber optic reflective board is extremely short, there are situations where different fiber optic reflective boards are powered on at the same time. Electrical fiber optic reflective boards may seize the same address, which may still cause errors in subsequent data operations.

In short, due to the low feasibility and small scope of application of the existing optical fiber reflective board address planning methods, especially in the face of collaborative simulation systems with large-scale and distributed simulation nodes, the above methods are not advisable. Therefore, it is urgent to explore an optical fiber self-organizing network method that can adapt to the requirements of collaborative simulation systems.

Contents of the invention

In view of the above analysis, embodiments of the present invention aim to provide a collaborative simulation system based on optical fiber self-organizing network to solve the problem that the existing simulation system's networking method is prone to address allocation errors, resulting in the simulation system's real-time data interaction process. The problem of incorrect operation data.

On the one hand, embodiments of the present invention provide a collaborative simulation system based on an optical fiber self-organizing network, including N simulation nodes connected through optical fibers. Each simulation node is composed of a simulation computer and an optical fiber reflection plate installed therein. card composition;

The simulation computer includes: a task planning module, used to analyze and plan the simulation task; a calculation and control module, used to solve the model of the simulation task and generate decision information based on the solution results; a data management module, used to Generate external interaction data of simulation nodes; and a networking communication module, which is used to implement optical fiber self-organizing network and provide a real-time data interaction channel for the simulation system to complete the communication of interactive data between simulation nodes;

The optical fiber reflective board is connected to a reflective memory hub. The reflective memory hub serves as a data relay system for receiving interactive data from simulation nodes and forwarding it to other simulation nodes.

Further, the simulation computer also includes an information collection unit for collecting the attributes of each simulation node and transmitting them to the task planning module. The attributes of the simulation node include the type and number of executable tasks and the maximum number of concurrencies. The task planning module is based on The attributes of each simulation node are assigned corresponding tasks.

Specifically, the collaborative simulation system has two control modes, namely: centralized control and distributed control;

In the centralized control mode, one simulation node serves as the management node, and the remaining N-1 simulation nodes serve as computing nodes. The management and control nodes are used to fuse and analyze the information of multiple computing nodes, and generate based on the analysis results. Global decision-making information is distributed to each computing node;

In the distributed control mode, N simulation nodes independently control the simulation process and generate decision information according to their own model solution status.

Specifically, the networking communication module adopts the following self-organizing network method, including:

Set the length l _i of the interactive data required by each optical fiber reflective board; the interactive data required by the optical fiber reflective board is the interactive data of the simulation node where it is located;

Set different delayed start times _Ti for each optical fiber reflective board card;

After the start-up time of optical fiber reflective board card i reaches its delayed start-up time T _i , perform the following operations:

In the area where the first address of the optical fiber address is A, find its own placeholder address _Ai , and write its occupancy mark _ai ; based on the placeholder address _Ai of the optical fiber reflection board card i, obtain its placeholder serial number _Zi ; based on The occupancy sequence number Z _i of the optical fiber reflection board card i obtains its own data operation address B _i and writes its data operation flag b _i ; the data operation flag _bi is determined by It is composed of l _i , l _i is the interactive data length of optical fiber reflection board card i,/> Represents the first address of the storage address _of the interactive data di required by the optical fiber reflective board card i;

All optical fiber reflective boards complete the above operations and complete the optical fiber self-organizing network;

Detect the change in the data length of any optical fiber reflective board, clear the data operation flags of all optical fiber reflective boards, and write the updated data operation flags in the data operation addresses of each optical fiber reflective board according to the original occupancy sequence. Update ad hoc network.

Specifically, the delay start time is set differently for each optical fiber reflective board card, including:

Step S101: Set a GUID for each optical fiber reflective board card. The GUID of any optical fiber reflective board card is different from the GUID of other optical fiber reflective board cards;

Step S102: Use the GUID of each optical fiber reflective board card as a random number seed to generate a different random positive integer R _i for each optical fiber reflective board card; the random positive integer R _i of any optical fiber reflective board card i satisfy:

1≤R _i ≤10N;

Among them, i=1, 2,...,N, N is the number of optical fiber reflection boards;

Step S103: Based on the random positive integer R _i of each optical fiber reflective plate card, set the delayed start time Ti ₌ t ₀ ×R _i of each optical fiber reflective plate card.

Specifically, the optical fiber reflective board card i looks for its own occupancy address A _i and writes its occupancy mark a _i , including:

Step S201: Sequentially read the data a ₁ to a _N′ stored in the occupied areas A ₁ to A N _′ with addresses starting with _A , and combine the data a _X at any address A Compare the signs to determine whether the place is occupied;

Step S202: When an unoccupied address A _i is found, write the occupation flag a _i of the optical fiber reflection plate card i here;

The occupancy flag a _i of the optical fiber reflective board card i consists of data a ¹ and the GUID of the optical fiber reflective board card i. The data a ¹ is 4 bytes, and a ¹ in the occupancy flags of all optical fiber reflective board cards is the same. .

Specifically, based on the occupancy address A _i of the optical fiber reflective board card i, the occupancy sequence number _Zi is obtained, including:

Step S301: Calculate the offset p _i of the placeholder address A _i of the optical fiber reflective plate card i relative to the first address A;

Step S302: Based on the offset p _i , set the occupancy number _Zi of the optical fiber reflection plate card i:

Z _i =0x1＜＜p _i ,

That is, 0x1 is shifted to the left by p _i bits.

Specifically, based on the occupancy sequence number Zi of the optical fiber reflective board card _i , obtain its own data operation address Bi _, and write its data operation flag _bi , including:

Step S401: Based on the occupancy sequence number Zi of the optical fiber reflective board card _i , determine the data operation address B _i of the optical fiber reflective board card i as: the first address B is offset by Z _i × 8 bits;

Step S402: Obtain the data operation flag b _i of the optical fiber reflective board card i, including: setting the length l _i of the interactive data of the optical fiber reflective board card i, and calculating the first address of the interactive data storage address of the optical fiber reflective board card i. Among them/> Calculated according to the following formula:

Indicates that for optical fiber reflective board 1, that is, the optical fiber reflective board with the smallest occupancy number, the data operation flag is the first address D of the area D where the interactive data of the optical fiber reflective board is stored; and for other optical fiber reflective board cards i (i=2, 3,...,N), the /> in their data operation flags For fiber optic reflective plate card k/> The sum of l _k and l k, the optical fiber reflective board card k is obtained in the following way: sort the occupancy numbers of all optical fiber reflective board cards in ascending order, and find the previous occupancy of the optical fiber reflective board card i occupancy number Z _i The bit sequence number Z _k corresponds to the optical fiber reflection board card k.

Specifically, the length l _i of the interactive data of the optical fiber reflective board card i is set to the length _{l_d i of} the interactive data di required by the optical fiber reflective board card, or is set to:

l _i =l_d _i +l′_d _i ×20%

Among them, l′_d _i represents the length of valid data in data _di .

Specifically, it is detected that the data length of any optical fiber reflective board changes, clear the data operation flags of all optical fiber reflective boards, and write updated data in the data operation address of each optical fiber reflective board according to the original occupancy order. Operation flags to update the ad hoc network, including:

Step S501: Set the redistribution flag c, the initial value is c ₀ ; all optical fiber reflective board cards can read the redistribution flag c, and the storage address is C;

Step S502: When the data operation length l _j of any optical fiber reflective card j in the optical fiber reflective memory network changes, change the initial redistribution flag c ₀ to c ₁ ;

Step S503: When the optical fiber reflective board card reads that the reassignment flag is c ₁ , it clears the data operation flags of all optical fiber reflective board cards, and writes the updated data operation address in the data operation address of each optical fiber reflective board card according to the original occupation sequence. The data operation flag updates the ad hoc network and restores the reassignment flag c ₁ to its initial value c ₀ .

Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

1. The collaborative simulation system of the present invention uses a network communication module to provide a channel for real-time data interaction during the simulation process, ensuring the correctness of data operations and improving the reliability of system simulation results;

2. The optical fiber self-organizing network method of the present invention can automatically and conflict-freely allocate addresses to each optical fiber reflective board based on the length of the interactive data of each simulated node. At the same time, when the length of the node interactive data changes, based on the update The data updates the self-organizing network, eliminating the need for cumbersome setting and maintenance of fiber addresses, ensuring real-time data interaction of the simulation system during the simulation process;

3. By storing various types of data on the optical fiber reflective board in different intervals, the data can be managed in segments, simplifying the compilation process, avoiding data confusion, and making it easier to share data within the network;

4. Compared with the method of manually pre-allocating addresses for optical fiber reflective boards, the self-organizing network method of the present invention enables the optical fiber reflective boards in the optical fiber network to have the ability to independently determine addresses, avoiding human errors;

5. Compared with the existing automatic address allocation method, this method sets different delayed start times for each optical fiber reflective board, which avoids the situation where optical fiber reflective boards that are powered on at the same time occupy the same address and cause data conflicts.

In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combination solutions. Additional features and advantages of the invention will be set forth in the description which follows, and in part, some advantages will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and obtained by the disclosure particularly pointed out in the description and drawings.

Description of the drawings

The drawings are only for the purpose of illustrating specific embodiments and are not considered to be limitations of the present invention. Throughout the drawings, the same reference symbols represent the same components;

Figure 1 is a schematic diagram of the cooperative simulation system based on optical fiber ad hoc network according to the present invention;

Figure 2 is a flow chart of the optical fiber self-organizing network method of the present invention;

Figure 3 is a schematic diagram of the composition and storage address of data operation flags.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

A specific embodiment of the present invention discloses a collaborative simulation system based on optical fiber self-organizing network. As shown in Figure 1, it includes N simulation nodes connected through optical fiber. Each simulation node is composed of a simulation computer and an installation device. It consists of fiber optic reflective boards;

The simulation computer includes: a task planning module, used to analyze and plan the simulation task; a calculation and control module, used to solve the model of the simulation task and generate decision information based on the solution results; a data management module, used to Generate external interaction data of simulation nodes; and a networking communication module, which is used to implement optical fiber self-organizing network and provide a real-time data interaction channel for the simulation system to complete the communication of interactive data between simulation nodes;

The optical fiber reflective board is connected to a reflective memory hub. The reflective memory hub serves as a data relay system for receiving interactive data from simulation nodes and forwarding it to other simulation nodes.

Further, the simulation computer also includes an information collection unit for collecting the attributes of each simulation node and transmitting them to the task planning module. The attributes of the simulation node include the type and number of executable tasks and the maximum number of concurrencies. The task planning module is based on The attributes of each simulation node are assigned corresponding tasks.

Specifically, the collaborative simulation system has two control modes, namely: centralized control and distributed control;

In the centralized control mode, one simulation node serves as the management and control node, and the remaining N-1 simulation nodes serve as computing nodes. The management and control node has the ability to make unified decisions and centralized command, and is used to control multiple systems during the simulation process. Monitor the information of computing nodes, conduct multi-source information fusion and analysis, and quickly generate global decision-making information that can achieve the best results based on the analysis results, and send it to each computing node as external interactive data; each computing node is based on the optical fiber network Global decision-making information is obtained, and its calculation and control modules perform corresponding simulation tasks based on the global decision-making information; the advantage of the centralized control mode is that it can uniformly plan and centrally manage the aircraft cluster, which improves the decision-making efficiency of the system.

In the distributed control mode, N simulation nodes execute tasks in parallel. Each simulation node has the ability to make independent decisions and control. Its respective calculation and control modules can independently control the simulation based on the solution results of its own model. process and generate decision information; for example, in this control mode, the external interaction data of the simulation node includes: the node serial number, the solution result of the model, and the decision information generated by the node, etc.; in the distributed control mode, the external interaction data of some nodes Failure will not affect the operation of the entire system, so the system has strong robustness, anti-interference capabilities, and high flexibility.

During implementation, first connect the optical fiber reflection board of each simulation node to the optical fiber reflection memory hub (HUB) through optical fiber. The HUB serves as the interface and relay for interactive data of each simulation node; then, determine the operation of the simulation system based on the simulation tasks and needs. mode and the number of participating nodes. Among them, the operating mode of the simulation system can be set to centralized control mode, distributed control mode, or a combination of centralized control and distributed control; the data acquisition unit collects the attributes of each simulation node , the properties include the simulation mode of the simulation node (semi-physical simulation or mathematical simulation), the type and number of executable tasks, the maximum number of concurrencies, etc.; the task planning module parses its own executable tasks from the simulation tasks based on the properties of its own simulation node. The subtasks to be executed, and the load status of the node is comprehensively considered, and the executable subtasks are assigned to the simulation node; the calculation and control module starts to execute the simulation task and solves the simulation model; the task information and model involved above The data generated during the solution process all constitute the status information of the simulation node, and the data management module obtains the external interaction data of the simulation node from the status information; exemplarily, the external interaction data is usually the task information of the simulation node, the model's Position, speed and attitude information, environmental situation information or decision-making information, etc.; the network communication module completes an optical fiber self-organizing network based on the length of external interaction data; based on this optical fiber network, the simulation system completes data interaction.

Before data interaction between simulation nodes, it is necessary to specify the storage address for the data that each fiber reflective board card needs to interact with in advance, and write the data to this address. Table 1 shows the data that each fiber optic reflective board card needs to interact with. (that is, the interactive data of each simulation node), the storage address of the data and the length of the data. Since the existing method of manually specifying addresses has problems such as heavy workload and easy error, the present invention proposes an optical fiber self-organizing network method. The purpose is to enable the network to automatically and conflict-free based on the length of interactive data of each optical fiber reflection board. In addition, the self-organizing network method can automatically find the storage address for the interactive data and write the interactive data into it for subsequent data interaction. In addition, this self-organizing network method can automatically provide the optical fiber reflective board with a new storage address when the interactive data of the optical fiber reflective board changes. The card's data storage address is reassigned to avoid conflicts in interactive data between adjacent optical fiber reflection boards.

Table 1 Interaction data, storage address and data length of each optical fiber reflective board

Store content Storage address (first address D) Data length Interaction data d ₁ of board 1 Address D ₁ l_d ₁ Interaction data d ₂ of board 2 Address D ₂ l_d ₂ ... ... ... Interaction data d _N of board N Address D _N l_d _N

Specifically, the fiber self-organizing network method, as shown in Figure 2, includes:

Set different delayed start times T _i for each optical fiber reflective board in the optical fiber reflective memory network; where i=1, 2,...,N, N is the number of simulation nodes, that is, the number of optical fiber reflective boards ;

After the start-up time of optical fiber reflective board card i reaches its delayed start-up time T _i , perform the following operations:

In the area where the first address of the optical fiber address is A, find its own placeholder address _Ai , and write its occupancy mark _ai ; based on the placeholder address _Ai of the optical fiber reflection board card i, obtain its placeholder serial number _Zi ; based on The occupancy sequence number Z _i of the optical fiber reflection board card i obtains its own data operation address B _i and writes its data operation flag b _i ; the data operation flag _bi is determined by It is composed of l _i , l _i is set according to the length of the interactive data of fiber reflection board card i,/> Indicates the first address of the interactive data storage address of the optical fiber reflective board card i;

All optical fiber reflective boards complete the above operations and complete the optical fiber self-organizing network;

And when it is detected that the data length of any optical fiber reflective board changes, that is, the length of the interactive data of any simulation node changes, clear the data operation flags of all optical fiber reflective boards, and follow the original occupancy order. Write the updated data operation flag in the data operation address of the optical fiber reflection board card to update the ad hoc network. Specific operations include:

Step S501: Set the redistribution flag c, the initial value is c ₀ ; all optical fiber reflective board cards can read the redistribution flag c, and the storage address is C;

For example, the initial value c ₀ of the reassignment flag can be set to a number in which N consecutive bits are all 1. For example, if the number of optical fiber reflection boards connected is 8, then c ₀ =0xFF can be set. The number of accesses is 10, then c ₀ =0x3FF;

Step S502: When the data operation length l _j of any optical fiber reflective card j in the optical fiber reflective memory network changes, change the initial redistribution flag c ₀ to c ₁ ;

For example, when the data operation length of any optical fiber reflective board changes, it means that the data content to be transmitted by the optical fiber reflective board changes. If the optical fiber reflective board is still stored according to the storage address specified by the original data operation flag for transmission, The data may conflict with the data of other optical fiber reflective boards. At this time, you can actively change the redistribution flag to c ₁ = 0x1;

Step S503: When the optical fiber reflective board card reads that the reassignment flag is c ₁ , it clears the data operation flags of all optical fiber reflective board cards, and writes the updated data operation address in the data operation address of each optical fiber reflective board card according to the original occupancy sequence number. The data operation flag updates the ad hoc network and restores the reassignment flag c ₁ to its initial value c ₀ .

Specifically, set different delayed start times for each optical fiber reflective board in the optical fiber reflective memory network. The operation is as follows:

Step S101: Set a GUID for each optical fiber reflective board card as a unique identifier to distinguish each optical fiber reflective board card. The GUID of any optical fiber reflective board card is different from the GUID of other optical fiber reflective board cards; specifically, Each GUID is 16 bytes;

Step S102: Use the GUID of each optical fiber reflective board card as a random number seed to generate a different random positive integer _Ri for each optical fiber reflective board card; the random positive integer Ri of any optical fiber reflective board card _i satisfies :

1≤R _i ≤10N,

Among them, i=1, 2,...,N, N is the number of optical fiber reflective boards that can be accommodated in the network;

Step S103: Based on the random positive integer R _i of each optical fiber reflective board card, set the delayed start time _Ti =t ₀ ×R _i of each optical fiber reflective board card;

Specifically, the random number seed is selected as the lower 32 bits of the GUID of the optical fiber reflective board. Preferably, t ₀ can be taken as 10ms. The delayed start time set according to the above steps satisfies: 1), the delay of any two optical fiber reflective boards The interval between start-up times is not less than 10ms; 2) The delayed start-up time of the optical fiber reflection board is _Ti ∈ [10, 1000]ms.

Specifically, after the start-up time of the optical fiber reflective board card i reaches its delayed start-up time T _i , it searches for its own occupancy address A _i and writes its occupancy flag a _i , including:

Step S201: Sequentially read the data a ₁ to a _N′ stored in the occupied areas A ₁ to A N _′ with addresses starting with _A , and combine the data a _X at any address A Compare the signs to determine whether the place is occupied;

Specifically, as shown in Table 2, the occupancy flag of the optical fiber reflective board card is composed of data a ¹ and the GUID of the optical fiber reflective board card. The data a ¹ is 4 bytes. The occupancy flag of all optical fiber reflective board cards is a ¹ are the same; for example, a ¹ can be set to 0x03070307;

Furthermore _, when judging whether the ^address _{at A} The last 16 bytes, that is, the GUID, can determine the identity information of the optical fiber reflective board card occupying that address;

Step S202: When an unoccupied address A _i is found, write the occupation flag a _i of the optical fiber reflection plate card i here;

In other words, the first empty address searched according to step S201 is used as the placeholder address of the optical fiber reflective board card i, and its occupancy flag is written here, which is composed of a ¹ and the GUID of the optical fiber reflective board card i.

Table 2 The composition and storage address of the occupancy flag

Specifically, based on the occupancy address A _i of the optical fiber reflection board card i, its occupancy sequence number Z _i is obtained, including:

Step S301: Calculate the offset p _i of the placeholder address A _i of the optical fiber reflective plate card i relative to the first address A;

Step S302: Based on the offset p _i , set the occupancy number _Zi of the optical fiber reflection plate card i:

Z _i =0x1＜＜p _i ,

That is, 0x1 is shifted to the left by p _i bits.

Further, based on the occupancy sequence number Zi of the optical fiber reflective board card _i , obtain its own data operation address B _i and write its data operation flag b _i , including:

Step S401: Based on the occupancy sequence number _Zi of the optical fiber reflective board card i, determine the data operation address B _i of the optical fiber reflective board card i; specifically, the data operation address B _i of the optical fiber reflective board card i is: offset of the first address B Z _i ×8 bits;

Step S402: Write the data operation flag bi of the optical fiber reflection board card _i at the data operation address _Bi ;

Specifically, as shown in Table 3, the data operation flag b _i is composed of It is composed of l _i , l _i is the length of the set interactive data of optical fiber reflection board card i,/> Indicates the first address of the interactive data storage address of the optical fiber reflective board card i;

in, Calculated according to the following rules:

Indicates that for optical fiber reflective board 1, that is, the optical fiber reflective board with the smallest occupancy number, the data operation flag is the first address D of the area D where the interactive data of the optical fiber reflective board is stored; and for other optical fiber reflective board cards i (i=2, 3,...,N), the /> in their data operation flags For fiber optic reflective plate card k/> The sum of l _k and l k, the optical fiber reflective board card k is obtained according to the following method: sort the occupancy serial numbers of all optical fiber reflective board cards in ascending order, and find the previous occupancy of the optical fiber reflective board card i occupancy serial number Z _i Bit sequence number Z _k , which corresponds to the optical fiber reflective plate card k;

When setting the length l _i of the interactive data of the optical fiber reflective board card _i , follow the following rules: set l _i to the length l_d _i of the data di required for the optical fiber reflective board card to interact, or preferably, set l _i It is the length l_d _i that is greater than the data _di required for interaction with the optical fiber reflective board, specifically:

Among them, l'_d _i represents the length of the valid data in the data d _i , that is, a certain margin is reserved as a backup when setting the data length _li of the optical fiber reflection board card. The data operation flags and storage addresses of each optical fiber reflection board are shown in Figure 3.

Table 3 Composition and storage address of data operation flags

Wait for all fiber optic reflective boards to complete the above 1) Find the placeholder address in area A and write the placeholder flag a _i , 2) Obtain its placeholder serial number Z _i based on the placeholder address, and 3) Find the data operation flag in area B After entering the address and writing the data operation flag b _i , the optical fiber self-organizing network is completed.

When implemented, the reading operation is: when the optical fiber reflective board card i reads the data of the optical fiber reflective board card j, it obtains its placeholder address according to the GUID of the optical fiber reflection board card j, and then obtains its placeholder serial number Z _j and data operation flag Address B _j , read its data operation flag b _j , you can know the storage space D _j of interactive data d _j of optical fiber reflection board j, just read the interactive data here; the writing operation is: reflection When board i writes data to the optical fiber address, it obtains its placeholder address, placeholder serial number Z _i and the address B _i of the data operation flag in sequence according to its own GUID, and reads the data operation flag b _j at B _i , that is It can be known that the storage address D _i of the interactive data _{di of} the optical fiber reflective plate card i is simply written here.

Compared with the existing technology, the collaborative simulation system based on the optical fiber self-organizing network provided by this embodiment has at least one of the following beneficial effects: 1. The collaborative simulation system of the present invention adopts a network communication module to provide simulation Real-time data interaction in the process provides a channel, ensuring the correctness of data operations and improving the reliability of system simulation results; 2. The optical fiber self-organizing network method of the present invention can be based on the length of the interactive data of each simulation node. Each optical fiber reflective board automatically assigns an address without conflict. At the same time, when the length of node interaction data changes, the self-organizing network is updated based on the updated data, eliminating the need for cumbersome setting and maintenance of optical fiber addresses, ensuring that the simulation system is in good condition. Real-time data interaction during the simulation process; 3. By storing various data of the optical fiber reflection board in different intervals, the data can be managed in segments, which simplifies the compilation program, avoids data confusion, and makes it easier to implement within the network Data sharing; 4. Compared with the method of manually pre-allocating addresses for optical fiber reflective boards, the self-organizing network method of the present invention enables the optical fiber reflective boards in the optical fiber network to have the ability to independently determine addresses, avoiding human errors; 5. Compared with the existing automatic address allocation method, this method sets different delayed start times for each optical fiber reflective board, which avoids the situation where optical fiber reflective boards that are powered on at the same time occupy the same address and cause data conflicts.

Those skilled in the art can understand that all or part of the process of implementing the method of the above embodiments can be completed by instructing relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. Wherein, the computer-readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory, etc.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention. All substitutions are within the scope of the present invention.

Claims (10)

1. A collaborative simulation system based on optical fiber self-organizing network, characterized by including N simulation nodes connected through optical fiber, wherein each simulation node is composed of a simulation computer and an optical fiber reflective board installed therein; The simulation computer includes: a task planning module, used to analyze and plan simulation tasks; a calculation and control module, used to solve the simulation model and generate decision-making information based on the solution results; a data management module, used to generate simulation The external interaction data of the nodes; and the network communication module, which is used to realize the optical fiber self-organizing network and provide a real-time data interaction channel for the simulation system to complete the communication of interactive data between the simulation nodes; The optical fiber reflective board is connected to a reflective memory hub. The reflective memory hub serves as a data relay system for receiving interactive data from simulation nodes and forwarding it to other simulation nodes. 2. The collaborative simulation system based on optical fiber ad hoc network according to claim 1, characterized in that the simulation computer also includes an information collection unit for collecting attributes of each simulation node and transmitting them to the task planning module. The attributes of the nodes include the type and number of executable tasks and the maximum number of concurrencies. The task planning module allocates corresponding tasks to each simulation node based on its attributes. 3. The collaborative simulation system based on optical fiber ad hoc network according to claim 2, characterized in that the collaborative simulation system has two control modes, namely: centralized control and distributed control; In the centralized control mode, one simulation node serves as the management node, and the remaining N-1 simulation nodes serve as computing nodes. The management and control nodes are used to fuse and analyze the information of multiple computing nodes, and generate based on the analysis results. Global decision-making information is distributed to each computing node; In the distributed control mode, the calculation and control modules of N simulation nodes independently control the simulation process and generate decision information according to their own model solution status. 4. The cooperative simulation system based on optical fiber ad hoc network according to any one of claims 1 to 3, characterized in that the network communication module adopts the following ad hoc network method, including: Set the length l _i of the interactive data required by each optical fiber reflective board; the interactive data required by the optical fiber reflective board is the interactive data of the simulation node where it is located; Set different delayed start times _Ti for each optical fiber reflective board card; After the start-up time of optical fiber reflective board card i reaches its delayed start-up time T _i , perform the following operations: In the area where the first address of the optical fiber address is A, find its own placeholder address _Ai , and write its occupancy mark _ai ; based on the placeholder address _Ai of the optical fiber reflection board card i, obtain its placeholder serial number _Zi ; based on The occupancy sequence number Z _i of the optical fiber reflection board card i obtains its own data operation address B _i and writes its data operation flag b _i ; the data operation flag _bi is determined by It is composed of l _i , l _i is the interactive data length of optical fiber reflection board card i,/> Represents the first address of the storage address _of the interactive data di required by the optical fiber reflective board card i; All optical fiber reflective boards complete the above operations and complete the optical fiber self-organizing network; Detect the change in the data length of any optical fiber reflective board, clear the data operation flags of all optical fiber reflective boards, and write the updated data operation flags in the data operation addresses of each optical fiber reflective board according to the original occupancy sequence. Update ad hoc network. 5. The cooperative simulation system based on optical fiber self-organizing network according to claim 4, characterized in that the delay start time is set differently for each optical fiber reflection board, including: Step S101: Set a GUID for each optical fiber reflective board card. The GUID of any optical fiber reflective board card is different from the GUID of other optical fiber reflective board cards; Step S102: Use the GUID of each optical fiber reflective board card as a random number seed to generate a different random positive integer R _i for each optical fiber reflective board card; the random positive integer R _i of any optical fiber reflective board card i satisfy: 1≤R _i ≤10N; Among them, i=1,2,...,N, N is the number of optical fiber reflective boards; Step S103: Based on the random positive integer R _i of each optical fiber reflective plate card, set the delayed start time Ti ₌ t ₀ ×R _i of each optical fiber reflective plate card. 6. The collaborative simulation system based on optical fiber ad hoc network according to claim 5, characterized in that the optical fiber reflective board card i looks for its own occupancy address A _i and writes its occupancy mark a _i , including: Step S201: Sequentially read the data a ₁ to a _N′ stored in the occupied areas A ₁ to A N _′ with addresses starting with _A , and combine the data a _X at any address A Compare the signs to determine whether the place is occupied; Step S202: When an unoccupied address A _i is found, write the occupation flag a _i of the optical fiber reflection plate card i here; The occupancy flag a _i of the optical fiber reflective board card i consists of data a ¹ and the GUID of the optical fiber reflective board card i. The data a ¹ is 4 bytes, and a ¹ in the occupancy flags of all optical fiber reflective board cards is the same. . 7. The cooperative simulation system based on optical fiber self-organizing network according to claim 6, characterized in that, based on the placeholder address _Ai of the fiber reflection board i, obtaining its placeholder serial number _Zi includes: Step S301: Calculate the offset p _i of the placeholder address A _i of the optical fiber reflective plate card i relative to the first address A; Step S302: Based on the offset p _i , set the occupancy number _Zi of the optical fiber reflection plate card i: Z _i =0x1<<p _i , That is, 0x1 is shifted to the left by p _i bits. 8. The collaborative simulation system based on optical fiber self-organizing network according to claim 7, characterized in that, based on the occupancy serial number _Zi of the optical fiber reflective board i, obtain its own data operation address Bi, _and write it Data operation flags _bi , including: Step S401: Based on the occupancy sequence number Zi of the optical fiber reflective board card _i , determine the data operation address B _i of the optical fiber reflective board card i as: the first address B is offset by Z _i × 8 bits; Step S402: Obtain the data operation flag b _i of the optical fiber reflective board card i, including: setting the length l _i of the interactive data of the optical fiber reflective board card i, and calculating the first address of the interactive data storage address of the optical fiber reflective board card i. Among them/> Calculated according to the following formula: Indicates that for optical fiber reflective board 1, that is, the optical fiber reflective board with the smallest occupancy number, the data operation flag is the first address D of the area D where the interactive data of the optical fiber reflective board card is stored; and for other optical fiber reflective board cards i (i=2,3,...,N), the /> in its data operation flag For fiber optic reflective plate card k/> The sum of l _k and l k, the optical fiber reflective board card k is obtained in the following way: sort the occupancy numbers of all optical fiber reflective board cards in ascending order, and find the previous occupancy of the optical fiber reflective board card i occupancy number Z _i The bit sequence number Z _k corresponds to the optical fiber reflective plate card l. 9. The cooperative simulation system based on the optical fiber self-organizing network according to claim 4, characterized in that the length l _i of the interactive data of the optical fiber reflective board i is set to the required interactive data d _i of the optical fiber reflective board The length l_d _i , or set to: l _i =l_d _i +l′_d _i ×20% Among them, l′_d _i represents the length of valid data in data _di . 10. The cooperative simulation system based on the optical fiber self-organizing network according to claim 4, characterized in that when the data length of any optical fiber reflective board is detected to change, the data operation flags of all optical fiber reflective boards are cleared, and the data operation flags are cleared according to the original In the order of occupancy, write the updated data operation flag in the data operation address of each optical fiber reflection board card to update the ad hoc network, including: Step S501: Set the redistribution flag c, the initial value is c ₀ ; all optical fiber reflective board cards can read the redistribution flag c, and the storage address is C; Step S502: When the data operation length l _j of any optical fiber reflective card j in the optical fiber reflective memory network changes, change the initial redistribution flag c ₀ to c ₁ ; Step S503: When the optical fiber reflective board card reads that the reassignment flag is c ₁ , it clears the data operation flags of all optical fiber reflective board cards, and writes the updated data operation address in the data operation address of each optical fiber reflective board card according to the original occupation sequence. The data operation flag updates the ad hoc network and restores the reassignment flag c ₁ to its initial value c ₀ .