Beam switching method and system for reducing power consumption of multiple coverage constellation satellites

Abstract

The invention discloses a beam switching method and system for reducing the power consumption of satellites in a multi-coverage constellation. The method comprises the following steps: determining the real-time total power consumption of each satellite in the multi-coverage constellation; determining the real-time storage battery discharge depth of each satellite in the multi-coverage constellation; constructing a power consumption balance model by taking the discharge depth difference quantity of the storage batteries of the satellites in the minimum multi-coverage constellation as a criterion; based on the power consumption equalization model, solving to obtain beam set information of each satellite in the multi-coverage constellation after power consumption equalization; and sending the solved beam set information of the satellites in the multi-coverage constellation after power consumption equalization to the corresponding satellites, and setting corresponding beams in the beam set information after power consumption equalization as service beams by the satellites to complete power consumption equalization of the satellites in the multi-coverage constellation. The method can significantly improve the resource utilization rate of the constellation system.

Description

Technical Field

[0001] The present invention belongs to the technical field of low-orbit communication satellites, and in particular, relates to a beam switching method and system for reducing power consumption of multiple coverage constellation satellites. Background Art

[0002] Low-orbit satellites usually refer to satellites with an orbit altitude of less than 2000km. Compared with the coverage area formed by a single satellite, the constellation formed by multiple satellites significantly enhances the coverage performance of the system and improves the availability and flexibility of the system in terms of information acquisition and distribution.

[0003] The low-orbit global communication satellite constellation can provide broadband communication services to the world. Broadband communication services generally require random beams and business beams. Among them, the random beam realizes the transmission and reception of user access information, and performs polling scanning within the beam coverage area; the business beam provides users with services such as online maintenance, paging and response, and data communication transmission, and has two working modes: staring and beam hopping. In the staring working mode, a specific beam can continuously point to the longitude and latitude of the user; in the beam hopping working mode, the satellite's coverable area is divided into several cells, and multiple beams on the satellite can be relayed to continuously cover the longitude and latitude of the user.

[0004] If a user can be accessed by multiple satellites at the same time, it is considered that the constellation can achieve multiple coverage in the user's area. In the case of multiple coverage, the redundant characteristics of multiple coverage can be used to optimize system performance. The detailed analysis of satellite power requirements is an important part of the overall satellite design. The power requirements of the satellite directly determine the scale of the satellite solar panels and batteries, and affect the selection of thermal control components. The power of the satellite depends on the satellite's business model and the design of the payload module.

[0005] For the satellite's business model, under the premise of maintaining a certain system communication capacity, there are two beam switching methods for satellites equipped with multiple beams. Method one is to let each satellite open fewer beams in multiple coverage areas; method two is to let a few satellites open more beams in multiple coverage areas. Both methods can maintain the system communication capacity. However, for a specific satellite in a specific orbit, it may be preparing to enter the earth's shadow at this time, and can only be powered by batteries, or enter an area that requires more business needs, resulting in increased on-board power consumption. Various situations will cause the power consumption of a single satellite to change sharply in a short period of time or increase the consumption of the battery, which is not conducive to the design and operation of the satellite system. Existing technologies rarely design satellite power balancing strategies through constellation-level task scheduling. Summary of the invention

[0006] The technology of the present invention solves the problem: Overcoming the shortcomings of the prior art, providing a beam switching method and system for reducing the power consumption of multiple coverage constellation satellites, aiming to reduce the power consumption of multiple coverage constellation satellites.

[0007] In order to solve the above technical problems, the present invention discloses a beam switching method for reducing power consumption of a multiple coverage constellation satellite, comprising:

[0008] Determine the real-time total power consumption of each satellite in a multiple coverage constellation;

[0009] Determining a real-time battery discharge depth of each satellite in the multiple coverage constellation based on the determined real-time total power consumption of each satellite in the multiple coverage constellation;

[0010] According to the determined real-time battery discharge depth of each satellite in the multiple coverage constellation, a power consumption balancing model is constructed with minimizing the difference of battery discharge depth of each satellite in the multiple coverage constellation as a criterion;

[0011] Based on the power consumption balance model, the beam set information of each satellite in the multi-coverage constellation after power consumption balance is obtained;

[0012] The obtained beam set information of each satellite in the multiple coverage constellation after power consumption equalization is sent to the corresponding satellite. The satellite sets the corresponding beam in the beam set information after power consumption equalization as the service beam, thereby completing the power consumption equalization of each satellite in the multiple coverage constellation.

[0013] In the above-mentioned beam switching method for reducing power consumption of satellites in a multiple coverage constellation, determining the real-time total power consumption of each satellite in the multiple coverage constellation includes:

[0014] Determine the real-time total multi-beam power consumption of each satellite in a multiple coverage constellation;

[0015] Determine the real-time total power consumption of other power consuming devices other than multi-beam payloads on each satellite in the multiple coverage constellation;

[0016] The real-time total power consumption of each satellite in the multiple coverage constellation is determined according to the determined real-time total power consumption of multiple beams of each satellite in the multiple coverage constellation and the real-time total power consumption of other power consuming devices of each satellite in the multiple coverage constellation except the multi-beam load.

[0017] In the above-mentioned beam switching method for reducing power consumption of satellites in a multiple coverage constellation, the real-time total power consumption of multiple beams of each satellite in the multiple coverage constellation is determined by the following formula:

[0018]

[0019] Among them, X i represents the real-time total power consumption of multi-beam of the i-th satellite in the multiple coverage constellation, N i,beam represents the number of beams of the i-th satellite in the multiple coverage constellation, represents the mth beam of the ith satellite in the multiple coverage constellation, represents the mth beam of the ith satellite in the multiple coverage constellation Real-time business volume, represents the mth beam of the i-th satellite in the multiple coverage constellation Real-time business volume The real-time power consumption generated, i=1,2,...,N S , N S Represents the total number of satellites in the multiple coverage constellation.

[0020] In the above-mentioned beam switching method for reducing power consumption of satellites in a multiple coverage constellation, the real-time total power consumption of power-consuming devices of each satellite in the multiple coverage constellation is determined by the following formula:

[0021]

[0022] Among them, Y i represents the real-time total power consumption of other power-consuming devices of the i-th satellite in the multiple coverage constellation except the multi-beam load, Ni,device represents the number of other power-consuming devices on the i-th satellite in the multiple coverage constellation except for the multi-beam payload, represents the nth other power-consuming device of the i-th satellite in the multiple coverage constellation represents the nth other power-consuming device of the i-th satellite in the multiple coverage constellation Real-time power consumption.

[0023] In the above-mentioned beam switching method for reducing power consumption of satellites in a multiple coverage constellation, the real-time total power consumption of each satellite in the multiple coverage constellation is determined by the following formula:

[0024]

[0025] Among them, P i represents the real-time total power consumption of the i-th satellite in the multiple coverage constellation.

[0026] In the above beam switching method for reducing power consumption of satellites in a multiple coverage constellation, the real-time battery discharge depth of each satellite in the multiple coverage constellation is determined by the following formula:

[0027]

[0028] Among them, DOD i PSA represents the real-time battery discharge depth of the i-th satellite in the multiple coverage constellation. i Represents the real-time charging power of the solar panels of the i-th satellite in the multiple coverage constellation.

[0029] In the above-mentioned beam switching method for reducing power consumption of multiple coverage constellation satellites, the power consumption balancing model is expressed as follows:

[0030] minmax|DOD i -DOD j |

[0031] Where j = 1, 2, ..., N S , i≠j.

[0032] In the above-mentioned beam switching method for reducing power consumption of satellites in a multiple coverage constellation, based on the power consumption balance model, the beam set information of each satellite in the multiple coverage constellation after power consumption balance is obtained, including:

[0033] Determining the average depth of discharge (DOD) of satellite batteries for multiple coverage constellations average :

[0034]

[0035] The real-time battery discharge depth of each satellite in the multi-coverage constellation is traversed in a loop to obtain the real-time battery discharge depth difference |DOD i -DOD j |sequence, and sort them in descending order, and get the satellite battery sorting array as {(i1,j1),(i2,j2),(i3,j3)...}; where the total number of elements in the satellite battery sorting array is N P ;

[0036] Take the first 1 / 4 elements in the satellite battery sorting array to obtain the satellite number set C involved in the beam adjustment. S , set C S The total number of elements in is N CS ;

[0037] Determine the set C S Depth of discharge and DOD of satellite batteries average Difference:

[0038] ΔDOD p =DOD p -DOD average

[0039] Where, ΔDOD p Represents the set C S Real-time battery discharge depth DOD of satellite number p p With DOD average The difference; p = 1, ..., N CS ;

[0040] like Then the priority is to reduce the number of beams opened by the corresponding satellite; if Then priority is given to increasing the number of beams opened by the corresponding satellite.

[0041] In the above-mentioned beam switching method for reducing power consumption of multiple coverage constellation satellites,

[0042] Accordingly, the present invention also discloses a beam switching system for reducing power consumption of a multiple coverage constellation satellite, comprising:

[0043] A first determination module is used to determine the real-time total power consumption of each satellite in the multiple coverage constellation;

[0044] A second determination module is used to determine the real-time battery discharge depth of each satellite in the multiple coverage constellation according to the determined real-time total power consumption of each satellite in the multiple coverage constellation;

[0045] A model building module is used to build a power consumption balancing model according to the determined real-time battery discharge depth of each satellite in the multiple coverage constellation and taking minimizing the difference in battery discharge depth of each satellite in the multiple coverage constellation as a criterion;

[0046] A solution module is used to solve the beam set information of each satellite in the multiple coverage constellation after power consumption balance based on the power consumption balance model;

[0047] The balancing module is used to send the beam set information of each satellite in the multiple coverage constellation after power consumption balancing to the corresponding satellite. The satellite sets the corresponding beam in the beam set information after power consumption balancing as the service beam, thereby completing the power consumption balancing of each satellite in the multiple coverage constellation.

[0048] The present invention has the following advantages:

[0049] The present invention discloses a beam switching method and system for reducing the power consumption of satellites in multiple coverage constellations. The beam switching strategy of the satellite is dynamically adjusted without affecting the service capacity to prevent the power demand or consumption of a single satellite from changing sharply in a short period of time. The method can significantly improve the resource utilization of the constellation system, achieve satellite power balance, and reduce the power consumption of satellites in multiple coverage constellations. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a flowchart of the steps of a beam switching method for reducing power consumption of a multiple coverage constellation satellite in an embodiment of the present invention;

[0051] Figure 2 This is a schematic diagram of the discharge depth of a satellite battery of a certain satellite before and after equalization in an embodiment of the present invention;

[0052] Figure 3 The present invention is a block diagram of a beam switching system for reducing power consumption of a multiple coverage constellation satellite in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0054] Reference Figure 1 In this embodiment, a beam switching method for reducing power consumption of a multiple coverage constellation satellite includes:

[0055] Step 1: Determine the real-time total power consumption of each satellite in the multiple coverage constellation.

[0056] In this embodiment, the process of determining the real-time total power consumption of each satellite in the multiple coverage constellation is as follows:

[0057] Determine the total real-time multi-beam power consumption for each satellite in the multiple coverage constellation:

[0058]

[0059] Among them, X i represents the real-time total power consumption of multi-beam of the i-th satellite in the multiple coverage constellation, N i,beam represents the number of beams of the i-th satellite in the multiple coverage constellation, represents the mth beam of the ith satellite in the multiple coverage constellation, represents the mth beam of the ith satellite in the multiple coverage constellation Real-time business volume, represents the mth beam of the i-th satellite in the multiple coverage constellation Real-time business volume The real-time power consumption generated, i=1,2,...,N S , N S Represents the total number of satellites in the multiple coverage constellation.

[0060] Determine the real-time total power consumption of other power consuming devices other than multi-beam payloads for each satellite in the multi-coverage constellation:

[0061]

[0062] Among them, Y i represents the real-time total power consumption of other power-consuming devices of the i-th satellite in the multiple coverage constellation except the multi-beam load, Ni,device represents the number of other power-consuming devices on the i-th satellite in the multiple coverage constellation except for the multi-beam payload, represents the nth other power-consuming device of the i-th satellite in the multiple coverage constellation represents the nth other power-consuming device of the i-th satellite in the multiple coverage constellation Real-time power consumption.

[0063] According to X i and Y i , determine the real-time total power consumption of each satellite in the multi-coverage constellation:

[0064]

[0065] Among them, P i represents the real-time total power consumption of the i-th satellite in the multiple coverage constellation.

[0066] Step 2: Determine the real-time battery discharge depth of each satellite in the multiple coverage constellation according to the determined real-time total power consumption of each satellite in the multiple coverage constellation.

[0067] In this embodiment, the real-time battery discharge depth of each satellite in the multiple coverage constellation can be determined by the following formula:

[0068]

[0069] Among them, DOD i PSA represents the real-time battery discharge depth of the i-th satellite in the multiple coverage constellation. i Represents the real-time charging power of the solar panels of the i-th satellite in the multiple coverage constellation.

[0070] Step 3: According to the determined real-time battery discharge depth of each satellite in the multiple coverage constellation, a power consumption balancing model is constructed with minimizing the difference in battery discharge depth of each satellite in the multiple coverage constellation as a criterion.

[0071] In this embodiment, the power consumption balancing model is expressed as follows:

[0072] minmax|DOD i -DOD j |

[0073] Where j = 1, 2, ..., N S , i≠j.

[0074] Step 4: Based on the power consumption balance model, obtain the beam set information of each satellite in the multiple coverage constellation after power consumption balance.

[0075] In this embodiment, first, the average discharge depth DOD of the satellite batteries of the multiple coverage constellations is determined. average :

[0076]

[0077] Then, the real-time battery discharge depth of each satellite in the multiple coverage constellation is traversed in a loop to obtain the real-time battery discharge depth difference |DOD i-DOD j |sequence, and sort them in descending order, and the satellite battery sorting array is obtained as {(i1,j1),(i2,j2),(i3,j3)...}. Among them, the total number of elements in the satellite battery sorting array is N P ,

[0078] Furthermore, the first 1 / 4 elements in the satellite battery sorting array are taken to obtain the satellite number set C involved in the beam adjustment. S , set C S The total number of elements in is N CS .

[0079] Furthermore, we determine the set C S Depth of discharge and DOD of satellite batteries average Difference:

[0080] ΔDOD p =DOD p -DOD average

[0081] Where, ΔDOD p Represents the set C S Real-time battery discharge depth DOD of satellite number p p With DOD average The difference; p = 1, ..., N CS .

[0082] like Then the priority is to reduce the number of beams opened by the corresponding satellite; if Then priority is given to increasing the number of beams opened by the corresponding satellite.

[0083] Step 5: Send the obtained beam set information of each satellite in the multiple coverage constellation after power consumption equalization to the corresponding satellite. The satellite sets the corresponding beam in the beam set information after power consumption equalization as the service beam, thereby completing the power consumption equalization of each satellite in the multiple coverage constellation.

[0084] From then on, the energy balance of the entire constellation is completed. Figure 2 As shown, the solid line is the discharge depth curve of a satellite battery before balancing, and the dotted line is the discharge depth curve of a satellite battery after balancing. The rising curve indicates that the real-time total power consumption of the satellite is greater than the real-time charging power of the satellite solar wing, and the falling curve indicates that the real-time total power consumption of the satellite is less than the real-time charging power of the satellite solar wing. Figure 2 It can be seen from the figure that after the capacity of multiple coverage constellations is balanced, the maximum discharge depth of the satellite can be reduced by an average of 5% to 8% compared with before the balance.

[0085] In summary, the present invention discloses a beam switching method for reducing the power consumption of satellites in a multiple coverage constellation, constructs a power consumption balance model based on the real-time battery discharge depth of each satellite in the multiple coverage constellation, and solves to obtain the beam set information of each satellite in the multiple coverage constellation after power consumption balance, thereby realizing power consumption balance of each satellite in the multiple coverage constellation. The method of the present invention can significantly improve the resource utilization rate of the constellation system.

[0086] Based on the above embodiments, the present invention also discloses a beam switching system for reducing power consumption of multiple coverage constellation satellites, such as Figure 3 As shown, the system includes:

[0087] The first determination module is used to determine the real-time total power consumption of each satellite in the multiple coverage constellation.

[0088] The second determination module is used to determine the real-time battery discharge depth of each satellite in the multiple coverage constellation according to the determined real-time total power consumption of each satellite in the multiple coverage constellation.

[0089] The model building module is used to build a power consumption balancing model according to the determined real-time battery discharge depth of each satellite in the multiple coverage constellation and taking minimizing the difference in battery discharge depth of each satellite in the multiple coverage constellation as a criterion.

[0090] The solution module is used to solve the beam set information of each satellite in the multiple coverage constellation after power consumption is balanced based on the power consumption balance model.

[0091] The balancing module is used to send the beam set information of each satellite in the multiple coverage constellation after power consumption balancing to the corresponding satellite. The satellite sets the corresponding beam in the beam set information after power consumption balancing as the service beam, thereby completing the power consumption balancing of each satellite in the multiple coverage constellation.

[0092] As for the system embodiment, since it corresponds to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment part.

[0093] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0094] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A beam switching method for reducing power consumption of multiple coverage constellation satellites, characterized in that: include: Determine the real-time total power consumption of each satellite in a multiple coverage constellation; Determining a real-time battery discharge depth of each satellite in the multiple coverage constellation based on the determined real-time total power consumption of each satellite in the multiple coverage constellation; According to the determined real-time battery discharge depth of each satellite in the multiple coverage constellation, a power consumption balancing model is constructed with minimizing the difference of battery discharge depth of each satellite in the multiple coverage constellation as a criterion; Based on the power consumption balance model, the beam set information of each satellite in the multi-coverage constellation after power consumption balance is obtained; The obtained beam set information of each satellite in the multiple coverage constellation after power consumption equalization is sent to the corresponding satellite. The satellite sets the corresponding beam in the beam set information after power consumption equalization as the service beam, thereby completing the power consumption equalization of each satellite in the multiple coverage constellation.

2. The beam switching method for reducing power consumption of multiple coverage constellation satellites according to claim 1, characterized in that: Determine the real-time total power consumption of each satellite in a multi-coverage constellation, including: Determine the real-time total multi-beam power consumption of each satellite in a multiple coverage constellation; Determine the real-time total power consumption of other power consuming devices other than multi-beam payloads on each satellite in the multiple coverage constellation; The real-time total power consumption of each satellite in the multiple coverage constellation is determined according to the determined real-time total power consumption of multiple beams of each satellite in the multiple coverage constellation and the real-time total power consumption of other power consuming devices of each satellite in the multiple coverage constellation except the multi-beam load.

3. The beam switching method for reducing power consumption of multiple coverage constellation satellites according to claim 2, characterized in that: The real-time total power consumption of multi-beams for each satellite in the multi-coverage constellation is determined by the following formula: Among them, X i represents the real-time total power consumption of multi-beam of the i-th satellite in the multiple coverage constellation, N i,beam represents the number of beams of the i-th satellite in the multiple coverage constellation, represents the mth beam of the ith satellite in the multiple coverage constellation, represents the mth beam of the ith satellite in the multiple coverage constellation Real-time business volume, represents the mth beam of the i-th satellite in the multiple coverage constellation Real-time business volume The real-time power consumption generated, i=1,2,...,N S , N S Represents the total number of satellites in the multiple coverage constellation.

4. The beam switching method for reducing power consumption of multiple coverage constellation satellites according to claim 3, characterized in that: The real-time total power consumption of power-consuming devices of each satellite in the multi-coverage constellation is determined by the following formula: Among them, Y i represents the real-time total power consumption of other power-consuming devices of the i-th satellite in the multiple coverage constellation except the multi-beam load, Ni,device represents the number of other power-consuming devices on the i-th satellite in the multiple coverage constellation except for the multi-beam payload, represents the nth other power-consuming device of the i-th satellite in the multiple coverage constellation represents the nth other power-consuming device of the i-th satellite in the multiple coverage constellation Real-time power consumption.

5. The beam switching method for reducing power consumption of multiple coverage constellation satellites according to claim 4, characterized in that: The real-time total power consumption of each satellite in the multi-coverage constellation is determined by the following formula: Among them, P i represents the real-time total power consumption of the i-th satellite in the multiple coverage constellation.

6. The beam switching method for reducing power consumption of multiple coverage constellation satellites according to claim 5, characterized in that: The real-time battery discharge depth of each satellite in the multiple coverage constellation is determined by the following formula: Among them, DOD i PSA represents the real-time battery discharge depth of the i-th satellite in the multiple coverage constellation. i Represents the real-time charging power of the solar panels of the i-th satellite in the multiple coverage constellation.

7. The beam switching method for reducing power consumption of multiple coverage constellation satellites according to claim 6, characterized in that: The power consumption balancing model is expressed as follows: minmax|DOD i -DOD j | Where j = 1, 2, ..., N S , i≠j.

8. The beam switching method for reducing power consumption of multiple coverage constellation satellites according to claim 7, characterized in that: Based on the power consumption balance model, the beam set information of each satellite in the multi-coverage constellation after power consumption balance is obtained, including: Determining the average depth of discharge (DOD) of satellite batteries for multiple coverage constellations average : The real-time battery discharge depth of each satellite in the multi-coverage constellation is traversed in a loop to obtain the real-time battery discharge depth difference |DOD i -DOD j |sequence, and sort them in descending order, and get the satellite battery sorting array as {(i1,j1),(i2,j2),(i3,j3)...}; where the total number of elements in the satellite battery sorting array is N P ; Take the first 1 / 4 elements in the satellite battery sorting array to obtain the satellite number set C involved in the beam adjustment. S , set C S The total number of elements in is N CS ; Determine the set C S Depth of discharge and DOD of satellite batteries average Difference: ΔDOD p =DOD p -DOD average Where ΔDOD p Represents the set C S Real-time battery discharge depth DOD of satellite number p p With DOD average The difference; p = 1, ..., N CS ; like Then the priority is to reduce the number of beams opened by the corresponding satellite; if Then priority is given to increasing the number of beams opened by the corresponding satellite.

9. The beam switching method for reducing power consumption of multiple coverage constellation satellites according to claim 8, characterized in that:

10. A beam switching system for reducing power consumption of multiple coverage constellation satellites, characterized in that: include: A first determination module is used to determine the real-time total power consumption of each satellite in the multiple coverage constellation; A second determination module is used to determine the real-time battery discharge depth of each satellite in the multiple coverage constellation according to the determined real-time total power consumption of each satellite in the multiple coverage constellation; A model building module is used to build a power consumption balancing model according to the determined real-time battery discharge depth of each satellite in the multiple coverage constellation and taking minimizing the difference in battery discharge depth of each satellite in the multiple coverage constellation as a criterion; A solution module is used to solve the beam set information of each satellite in the multiple coverage constellation after power consumption balance based on the power consumption balance model; The balancing module is used to send the beam set information of each satellite in the multiple coverage constellation after power consumption balancing to the corresponding satellite. The satellite sets the corresponding beam in the beam set information after power consumption balancing as the service beam, thereby completing the power consumption balancing of each satellite in the multiple coverage constellation.

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