CN105182819A - Satellite task planning system and method - Google Patents

Abstract

The invention provides a task planning system and a method, wherein the system comprises a server and a client, the server broadcasts available satellite state synchronization parameters corresponding to observation requirements to the client, the client acquires the observation requirements, generates corresponding task planning results based on the observation requirements and the available satellite state synchronization parameters, and returns the task planning results to the server. In other words, in the satellite mission planning system, the client can independently perform mission planning in the observation requirement proposing stage, and the timeliness is higher.

Description

A system and method for satellite mission planning

technical field

This application relates to the field of communication technology, in particular to a system and method for satellite mission planning.

Background technique

The satellite mission planning system is at the nerve center of remote sensing satellites for earth observation. As shown in Figure 1, the satellite mission planning system is deployed in the service center, and multiple users put forward earth observation requirements in their respective units. The satellite mission planning system automatically converts the user's earth observation requirements into observation plans that can be executed by satellite resources, and quickly Organize and complete the production and customization process of earth observation products, and accurately respond to user needs.

In recent years, as the application of satellites has become wider and wider, the number of satellites in orbit has also increased year by year, and the number of satellite users and the demand for observation tasks have also increased sharply. Not only that, the timeliness requirements of current users for observation target information are also increasing, especially in the application of emergency response to emergencies, the observation task has multiple characteristics of complexity, dynamics, uncertainty and high timeliness, which adds more Difficulty in task planning.

At present, the satellite mission planning problem is a complex combinatorial optimization problem, and centralized planning algorithms are mostly used in practical applications. The centralized planning algorithm must wait for the planning tasks and satellite resources to be determined before the task planning can be carried out. After task planning, if the task or resource changes or needs to be adjusted, the original planning result is no longer applicable and must be recalculated, which leads to poor real-time performance of task planning.

Contents of the invention

The invention provides a satellite task planning system and method, which are used to solve the problem of poor real-time performance of the existing satellite task planning technology.

Its specific technical scheme is as follows:

A satellite mission planning system, the system includes: a server and M clients connected to the server, wherein,

The server broadcasts state synchronization parameters of available satellites;

The client acquires observation requirements, generates corresponding mission planning results based on observation requirements and available satellite state synchronization parameters, and returns the mission planning results to the server.

Optionally, the server receives the available satellite telemetry data, broadcasts the available satellite state synchronization parameters obtained according to the satellite telemetry data to M clients, and provides timing for each of the M clients, In order to unify the time of the satellite mission planning system.

Optionally, the satellite telemetry data is specifically one or a combination of satellite energy data and/or satellite attitude parameters and/or satellite orbit elements and/or satellite storage capacity.

Optionally, the server receives the client's application request for obtaining a token, and issues an obtaining token to the client applying for obtaining a token, and recycles the client's token after receiving the client's release token request.

Optionally, the server obtains the priority of each client when receiving token application requests from N clients applying for the same satellite, and distributes the tokens to clients with high priority.

Optionally, the client, based on the satellite synchronization state data, screens out satellite resources that satisfy the conditions, decomposes the target area based on the coverage area of the target and the width of the satellite resource, and performs a visible time window for the decomposed target area Calculation and mission constraint inspection, screening astronomical events and meteorological conditions according to the results of mission constraint detection, and generating mission planning results based on the filtered results.

A satellite mission planning method, comprising:

The client obtains M observation requirements, and M is a positive integer greater than or equal to 1;

The client receives the available satellite status synchronization parameters broadcast by the server, and the client generates corresponding task planning results based on observation requirements and available satellite status synchronization parameters;

The client feeds back the task planning result to the server, so that the server can get response information based on the task planning result.

Optionally, before the client obtains the available satellite state synchronization parameters corresponding to the observation requirements, it also includes:

receiving satellite telemetry data, and broadcasting available satellite state synchronization parameters obtained according to the satellite telemetry data to M clients, and timing each client in the M clients, so that the satellite mission planning system Unity of time.

Optionally, the satellite telemetry data is specifically one or a combination of satellite energy data and/or satellite attitude parameters and/or satellite orbit elements and/or satellite storage capacity.

Optionally, after receiving the available satellite state synchronization parameters obtained according to the satellite telemetry data, the method further includes:

Based on the available satellite synchronization status data, select satellite resources that meet the conditions, decompose the target area based on the coverage area of the target and the width of the satellite resource, and perform visible time window calculation and task constraint check on the decomposed target area, according to the task The results of constraint detection are screened for astronomical events and meteorological conditions, and mission planning results are generated based on the screened results.

In the present invention, the server, the client, and multiple clients obtain the observation requirements, and the server will broadcast the available satellite state synchronization parameters to M clients, and the client generates corresponding tasks based on the observation requirements and the available satellite state synchronization parameters As a result of the planning, each client will process its own requirements independently and return the mission planning results to the server. That is to say, in the embodiment of the present invention, the satellite mission planning system can perform mission planning at the stage of proposing observation requirements, which is more time-sensitive.

In addition, in the embodiment of the present invention, incremental processing can be performed based on existing available satellite state synchronization parameters and mission planning results when a new requirement is raised, so as to meet the requirement of mission arrival at any time.

Description of drawings

Fig. 1 is a schematic diagram of a satellite mission planning system in the prior art;

Fig. 2 is a schematic diagram of a satellite mission planning system in an embodiment of the present invention;

Fig. 3 is a schematic diagram of the processing flow of the client in the embodiment of the present invention;

Fig. 4 is a flowchart of a satellite mission planning method in an embodiment of the present invention.

Detailed ways

In order to solve the system and method of satellite mission planning in the prior art, the system includes: a server and a client, the server will broadcast available satellite state synchronization parameters, the client obtains observation requirements, and generates corresponding data based on observation requirements and available satellite state synchronization parameters The mission planning results are returned to the server. That is to say, in the embodiment of the present invention, the satellite mission planning system can perform mission planning at the stage of proposing observation requirements, which is more time-sensitive.

The technical solutions of the present invention will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific technical features in the embodiments are only descriptions of the technical solutions of the present invention, rather than limitations. , the embodiments of the present invention and specific technical features in the embodiments may be combined with each other.

As shown in Figure 2, it is a schematic structural diagram of a satellite mission planning system in the embodiment of the present invention, the system includes a server 201 and M clients 202, each client 202 can communicate with the server 201, and the client 202 can The service center (satellite mission planning system) arranged in FIG. 1 can also be arranged in the user unit (satellite use request department), and the arrangement location of the client 202 is not limited in the embodiment of the present invention.

The satellite mission planning system can receive the observation requirements of various users, and the client 202 in the satellite mission planning system will obtain the observation requirements. Of course, one client 202 can obtain the observation requirements or multiple clients 202 can obtain the observation requirements. , and then the server 201 also broadcasts the status synchronization parameters of all available satellites to the M client 202.

The client 202 will generate corresponding mission planning results based on the received observation requirements and available satellite status synchronization parameters, and return the mission planning results to the server 201 .

After the server 201 receives the mission planning result, the server 201 will request satellite resources based on the mission planning result, obtain response information returned based on the mission observation result, and finally return the response information to the corresponding client.

In the above-mentioned embodiment, the client 202 in the satellite mission planning system can obtain the observation requirements, and then the client 202 can perform independent calculation and processing to obtain the satellite mission planning results, so that the satellite mission planning system can make the observation requirements It can carry out satellite mission planning, thereby improving the timeliness of the satellite mission planning system.

Specifically, in the embodiment of the present invention, the server 201 will broadcast the available satellite state synchronization parameters, that is, the server 201 will provide the available satellite state synchronization parameters to the client 202, and the specific implementation method is: the server 201 receives satellite telemetry data , the satellite telemetry data may be one or a combination of satellite energy data and/or satellite attitude parameters and/or satellite orbit elements and/or satellite storage capacity. The satellite energy data here can be battery power, the satellite attitude parameters can be roll angle, pitch angle, yaw angle, etc., and the satellite storage capacity can be the number of files and available storage capacity.

After the server 201 obtains the satellite telemetry data, the server 201 broadcasts the satellite telemetry data to the client 202, so that the client 202 obtains a satellite mission planning result based on available satellite state synchronization parameters.

Further, in order to ensure that the time in the entire satellite planning system is unified and synchronized, the server 201 will provide time service for each client 202, thus ensuring the time synchronization between each client 202 in the satellite planning system and the server 201.

Further, in the embodiment of the present invention, when there are no less than two clients working at the same time, the requirements they handle all need to use the same satellite to perform tasks, which is likely to cause resource conflicts such as energy and time, so through The way of token enables multiple clients to time-share the same satellite.

Specifically, the server 201 needs to send a token acquisition request to the corresponding client 202, and the token is used to inform the client 202 that there is a corresponding satellite resource. Specifically, when the client 202 needs to execute task planning, the client 202 will actively apply for a token from the server 201. If there is only one client 202 that applies for a token, the server 201 will directly request the token from the client. 202 issues a token, so that the client 202 can obtain the token. After the client 202 obtains the token, the client 202 can generate a corresponding task planning result for the corresponding satellite resources.

Of course, if multiple clients 202 apply for the same token to the server 201 at the same time, the server 201 will determine the priorities of the multiple clients 202, if the priority of a certain client 202 is higher, the server 201 will A token will be issued to the client 202, while other clients 202 will be in a waiting state. After the client 202 receives the token, the client 202 will notify the server 201 to issue a release token, and the server 201 will Recycle the client's token.

If multiple clients 202 have the same priority, the server 201 will issue a token to the client 202 with priority in time, that is, which client 202 applies first, and the server 201 will issue a token to that client 102. Tokens are issued, and the client 202 that receives the tokens can generate mission planning results for corresponding satellite resources. Then the client 202 notifies the server 201 to issue the release token, so that the client 202 can feed back the task planning result to the server 201 and recycle the token of the client 202 .

It should be noted here that the client 202 that has not applied for the token can choose to wait for the subsequent release of the token, or choose tokens from other satellite resources, which can improve the efficiency of the entire system.

Further, after obtaining the token, the client 202 will calculate the mission planning based on the satellite resources and available satellite status synchronization parameters given by the server 201. It should be noted here that the mission planning calculation of each client 202 is The process of independent processing, the specific processing process is as follows:

As shown in Figure 3, it is a schematic diagram of distributed task planning by the client 202. After the client 202 obtains the available satellite state synchronization parameters, the client 202 will perform preprocessing based on the available satellite state synchronization parameters. The preprocessing process includes: Task constraint detection, region object splitting. Among them, the task constraint inspection is specifically to screen out satellite resources that meet the observation sensor type, observation resolution, and time resolution; regional target splitting is based on the coverage area of the target and the size of the sensor width, and decomposes the target area , forming a sub-region that can be covered by a single view or a single strip photo of the spaceborne sensor.

After preprocessing, the client 202 will perform distributed task planning, which includes: access calculation and state deduction. Among them, the access calculation is to calculate the sub-satellite trajectory, the target visible time window, and the data transmission time window based on the satellite model. State deduction is based on available satellite state synchronization parameters and satellite models, deduces the energy, attitude, and storage status of satellites before and after performing observation and data transmission tasks, and screens out the available time windows.

After completing the distributed task planning, the client 202 will perform dynamic adjustment, which is to carry out multi-user collaboration according to the tasks already arranged by the satellite resources, to perform adjustments such as merging, replacing, and moving time windows, and to further screen the time windows , to avoid the influence of astronomical events such as solar eclipse and lunar eclipse and the influence of weather conditions such as cloud cover, and finally confirm the imaging parameters and attitude parameters, and finally the client 202 submits the task planning result, that is, after the task planning result is formed, it will be The task planning result is fed back to the server 201, so that the server 201 can obtain corresponding response information based on the task planning result, and finally the server 201 feeds back the response information to the corresponding user.

What needs to be emphasized here is that the execution process of each client 202 is independent of each other, so as to ensure that the user's observation requirements can be planned at the stage of proposal, and the timeliness is stronger, while the traditional method needs to wait for all observation requirements to be proposed Mission planning can only be performed after the satellite mission planning system in the embodiment of the present invention is more time-sensitive.

In addition, in the embodiment of the present invention, incremental processing can be performed based on existing available satellite state synchronization parameters and mission planning results when a new requirement is raised, so as to meet the requirement of mission arrival at any time.

In addition, corresponding to a satellite mission planning system in the embodiment of the present invention, the embodiment of the present invention also provides a method for satellite mission planning, as shown in FIG. 4 is a process flow of a satellite mission planning method in the embodiment of the present invention Figure, the method includes:

S401, the client acquires M observation requirements;

M is a positive integer greater than or equal to 1.

S402, the client receives the available satellite state synchronization parameters broadcast by the server; the client generates corresponding task planning results based on the observation requirements and the available satellite state synchronization parameters.

S403, the client feeds back the task planning result to the server, so that the server obtains response information based on the task planning result.

Further, in the embodiment of the present invention, before the client obtains the available satellite state synchronization parameters corresponding to the observation requirements, it also includes:

receiving satellite telemetry data, and broadcasting the available satellite state synchronization parameters obtained according to the satellite telemetry data to the clients, and providing time service for each of the M clients, so that the time of the satellite mission planning system is unified .

Further, in the embodiment of the present invention, the satellite telemetry data is specifically one or a combination of satellite energy data and/or satellite attitude parameters and/or satellite orbit elements and/or satellite storage capacity.

Further, in the embodiment of the present invention, after receiving the available satellite state synchronization parameters obtained according to the satellite telemetry data, it also includes:

Based on the available satellite synchronization status data, select satellite resources that meet the conditions, decompose the target area based on the coverage area of the target and the width of the satellite resource, and perform visible time window calculation and task constraint check on the decomposed target area, according to the task The results of constraint detection are screened for astronomical events and meteorological conditions, and mission planning results are generated based on the screened results.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those of ordinary skill in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. A satellite mission planning system, characterized in that the system includes: a server and M clients connected to the server, wherein, The server broadcasts available satellite state synchronization parameters; The client acquires observation requirements, generates corresponding mission planning results based on observation requirements and available satellite state synchronization parameters, and returns the mission planning results to the server. 2. The system according to claim 1, wherein the server receives the available satellite telemetry data, and broadcasts the available satellite state synchronization parameters obtained according to the satellite telemetry data to the client, and for the M clients Time service for each client in the terminal, so that the time of the satellite mission planning system is unified. 3. The system according to claim 1, wherein the satellite telemetry data is specifically one or a combination of satellite energy data and/or satellite attitude parameters and/or satellite orbit elements and/or satellite storage capacity . 4. The system according to claim 1, wherein the server receives an application request from a client to apply for a token, and issues a token to the client who applies for a token, and upon receiving the client's release order After a token request, the client's token is reclaimed. 5. The system according to claim 4, wherein the server obtains the priority of each client in the N clients when receiving N clients applying for the use token application request of the same satellite. level, the token will be issued to the high-priority client. 6. The system according to claim 1, wherein the client, based on the satellite synchronization state data, screens out satellite resources that meet the conditions, and performs a target area coverage with the target coverage area and the width of the satellite resource. Decomposition, the calculation of the visible time window and the inspection of task constraints are performed on the decomposed target area, and the astronomical events and meteorological conditions are screened according to the results of the task constraint detection, and the task planning results are generated based on the screened results. 7. A satellite mission planning method, characterized in that, comprising: The client obtains M observation requirements, and M is a positive integer greater than or equal to 1; The client receives the available satellite status synchronization parameters broadcast by the server, and the client generates corresponding mission planning results based on observation requirements and available satellite status synchronization parameters; The client feeds back the task planning result to the server, so that the server can get response information based on the task planning result. 8. The method according to claim 7, further comprising: before the client obtains the available satellite state synchronization parameters corresponding to the observation requirements: The available satellite state synchronization parameters broadcasted by the server are received, and the timing is given to each of the M clients, so that the time of the satellite mission planning system is unified. 9. The method according to claim 7, wherein the satellite telemetry data is specifically one or a combination of satellite energy data and/or satellite attitude parameters and/or satellite orbit elements and/or satellite storage capacity . 10. The method according to claim 7, further comprising: after receiving the available satellite state synchronization parameters obtained according to satellite telemetry data: Based on satellite synchronization status data, select satellite resources that meet the conditions, decompose the target area based on the coverage area of the target and the width of the satellite resource, and perform visible time window calculation and task constraint check on the decomposed target area. According to the task constraints The detected results are screened for astronomical events and meteorological conditions, and mission planning results are generated based on the screened results.