Flexible and adjustable satellite telemetry acquisition and downloading system and method

Abstract

The invention discloses a flexible and adjustable satellite telemetering quantity acquisition and downloading system and method, and the system comprises a telemetering acquisition unit which is used for periodically acquiring telemetering quantity generated by each module in a load subsystem when a feed link is provided; the acquisition table storage unit is used for storing a telemetering acquisition table uploaded by a ground operation and control system; when the telemetering quantity needs to be downloaded through the measurement and control link, the telemetering acquisition unit is used for screening the telemetering quantity required by the ground operation and control system according to the telemetering acquisition table, and the telemetering quantity is the telemetering quantity required by telemetering downloading of the measurement and control link; the telemetering processing unit is used for receiving the telemetering quantity acquired by the telemetering acquisition unit, storing the telemetering quantity on a satellite to form a telemetering quantity set of a load subsystem, and performing health monitoring on the required telemetering quantity; and the telemetering downloading unit is used for downloading the screened telemetering quantity required by the ground operation and control system to the ground operation and control system. The reliability of in-orbit operation of a satellite system is improved, and fine management of satellite in-orbit control is achieved.

Description

Technical Field

[0001] The present application relates to the field of satellite control technology, and in particular to a flexible and adjustable on-board telemetry acquisition and downlink system and method. Background Art

[0002] The acquisition and processing of onboard payload telemetry has long been a hot research topic in satellite control. Telemetry provides direct feedback on the satellite's operational health. When satellite telemetry anomalies occur, ground-based instructions are typically sent for processing. Therefore, accurate and timely transmission of telemetry is crucial to satellite safety. Furthermore, the telemetry acquisition process in space is susceptible to cosmic ray radiation, which can cause anomalies and, in turn, lead to a loss of control over the satellite's operational status. Therefore, the development of stable, reliable, and flexible telemetry acquisition design technologies is a hot topic in satellite control research.

[0003] Most of the existing on-board telemetry acquisition methods are that each single machine or module collects its own telemetry, which are completely independent of each other. The acquisition of telemetry is controlled by the software loaded in the chip. When different telemetry measurements need to be collected according to different working conditions, different applications need to be recompiled and loaded. This makes on-orbit telemetry acquisition inconvenient to use, and the payload system's telemetry collaborative acquisition capability is weak. It cannot provide timely, variable, and flexible full-system health status feedback parameters for the increasingly developed satellite on-orbit operation health status disposal. At the same time, the existing telemetry acquisition technology does not take into account telemetry anomalies caused by single particle upsets, wild values, etc. in the telemetry on-orbit, which in turn leads to misjudgment of the satellite health status. Summary of the Invention

[0004] In view of this, the present application provides a flexible and adjustable on-board telemetry acquisition and downlink system and method, which considers the acquisition, processing, packaging and downlink of on-board telemetry from a system perspective, and improves the reliability of the satellite system's on-orbit operation through means such as on-orbit adjustable telemetry acquisition, diverse downlink channels and radiation-resistant design, thereby realizing refined management of satellite on-orbit control.

[0005] The present application discloses a flexible and adjustable satellite telemetry acquisition and downlink system, which includes a payload subsystem; the payload subsystem includes a telemetry acquisition unit, an acquisition table storage unit, a telemetry processing unit, a telemetry downlink unit and a module; When there is a feeder link, the telemetry acquisition unit is used to periodically collect the telemetry quantities generated by each module in the payload subsystem and report them to the telemetry processing unit; the acquisition table storage unit is used to store the telemetry acquisition table uploaded by the ground operation and control system; when it is necessary to transmit telemetry quantities through the measurement and control link, the telemetry acquisition unit is used to screen the telemetry quantities required by the ground operation and control system according to the telemetry acquisition table, and the telemetry quantities required for the telemetry downlink of the measurement and control link; the telemetry processing unit is used to receive the telemetry quantities collected by the telemetry acquisition unit, store them on the satellite, form a telemetry quantity set of the payload subsystem, and perform health monitoring on the required telemetry quantities; the telemetry downlink unit is used to package the screened telemetry quantities required by the ground operation and control system in accordance with the required telemetry data packet format and transmit them to the ground operation and control system; When there is no feeder link, the telemetry downlink link between the telemetry downlink unit and the ground operation and control system is used to downlink the telemetry quantities required for satellite health status monitoring to the ground operation and control system. The ground operation and control system uploads the telemetry acquisition table to the acquisition table storage unit in the payload subsystem. Through the telemetry acquisition table, the satellite telemetry is controlled to collect different telemetry quantities from various modules of the payload subsystem; the telemetry information table includes the coordinate information of the telemetry quantities.

[0006] Furthermore, the collection table storage unit is used to store the telemetry collection table in a magnetoresistive non-volatile memory after receiving the telemetry collection table registered on the ground operation control system, and adopt software reinforcement to ensure the reliability of writing and reading the telemetry collection table; software reinforcement includes reliable loading, parameter redundant storage, and thread monitoring.

[0007] Furthermore, the telemetry processing unit is used to read the telemetry collection table from the collection table storage unit and request telemetry quantities from each module in the load subsystem according to the telemetry collection strategy specified in the telemetry collection table; After receiving a telemetry request, each module in the payload subsystem uses software radiation-resistant processing to ensure the stability, reliability, and effectiveness of the reported telemetry. This software radiation-resistant processing includes interface triple-module redundancy and data verification. The ground operation and control system is used to receive telemetry data transmitted from the payload subsystem and autonomously monitor the required telemetry data; the required telemetry data include on-board temperature, voltage, and rotation mechanism.

[0008] Furthermore, the telemetry collection strategy is used to instruct the telemetry processing unit to collect specified telemetry quantities from specified modules.

[0009] The present application also discloses a flexible and adjustable onboard telemetry acquisition and downlink method, which is applicable to the flexible and adjustable onboard telemetry acquisition and downlink system described above, and includes: Through centralized, filterable, and on-demand collection of onboard telemetry, system-level telemetry processing technology, based on software hardening, the satellite's on-orbit health status is monitored using required telemetry, including onboard temperature, voltage, and rotational mechanisms. Software hardening includes reliable loading, redundant parameter storage, and thread monitoring. When the feeder link is available, the telemetry acquisition unit periodically collects the telemetry measurements generated by each module in the payload subsystem and reports them to the telemetry processing unit; the acquisition table storage unit stores the telemetry acquisition table registered by the ground operation and control system; when it is necessary to transmit telemetry measurements through the measurement and control link, the telemetry acquisition unit selects the telemetry measurements required by the ground operation and control system according to the telemetry acquisition table, and uses the telemetry measurements required for the telemetry transmission of the measurement and control link; the telemetry processing unit receives the telemetry measurements collected by the telemetry acquisition unit, stores them on the satellite, forms a telemetry measurement set of the payload subsystem, and performs health monitoring on the required telemetry measurements; the telemetry transmission unit packages the telemetry measurements required by the ground operation and control system obtained by the screening according to the required telemetry data packet format and transmits them to the ground operation and control system; When there is no feeder link, the telemetry data required for satellite health status monitoring is transmitted to the ground operation and control system through the satellite-to-ground measurement and control link between the telemetry downlink unit and the ground operation and control system. The telemetry collection table is uploaded to the collection table storage unit in the payload subsystem through the ground operation and control system. Through the telemetry collection table, the satellite telemetry collection unit is controlled to collect different telemetry data from various modules of the payload subsystem; the telemetry information table includes the coordinate information of the telemetry data.

[0010] Furthermore, the ground operation and control system uploads the telemetry collection table to the collection table storage unit in the payload subsystem. After receiving the telemetry collection table uploaded from the ground, the collection table storage unit stores the collection table in a magnetoresistive non-volatile memory and uses software reinforcement to ensure the reliability of writing and reading the telemetry collection table.

[0011] Furthermore, the telemetry processing unit reads the telemetry collection table from the collection table storage unit, and requests telemetry quantities from each module in the load subsystem according to the telemetry collection strategy specified in the telemetry collection table.

[0012] Furthermore, after receiving the telemetry request, each module in the payload subsystem uses software anti-radiation processing means to ensure the stability, reliability and effectiveness of the reported telemetry; the software anti-radiation processing means include interface triple-mode redundancy and data verification.

[0013] Furthermore, the telemetry acquisition unit converts the received telemetry data of each module in the payload subsystem into a satellite-to-ground protocol; the telemetry downlink unit transmits the protocol-converted telemetry data of the payload subsystem from the satellite to the ground operation and control system.

[0014] Furthermore, the ground operation and control system receives the telemetry data transmitted by the payload subsystem and autonomously monitors the required telemetry data.

[0015] Due to the adoption of the above technical solution, this application has the following advantages: Through actual on-orbit operation tests, it has been proved that the on-demand telemetry acquisition control method of the on-board payload subsystem of this application from a system perspective has achieved refined control of the satellite system payload telemetry acquisition. The designed telemetry acquisition method based on the telemetry acquisition table is of great significance for improving the establishment of an integrated satellite-ground autonomous constellation health management mechanism with the ground during satellite on-orbit operation. At the same time, the telemetry acquisition unit, acquisition table storage unit, telemetry processing unit, telemetry downlink unit and other hardware of the on-board telemetry acquisition and downlink system all use radiation-resistant devices. The software running on them uses radiation-resistant measures such as reliable loading, redundant parameter storage, and thread monitoring, which ensures the stability of the system's on-orbit operation and strongly supports the long-term operation of the constellation in an autonomous and stable state. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 This is a block diagram of a flexible and adjustable satellite telemetry acquisition and downlink system according to an embodiment of the present application; Figure 2 This is a flow chart of a flexible and adjustable onboard telemetry acquisition and downlink method according to an embodiment of the present application. DETAILED DESCRIPTION

[0017] The present application is further described with reference to the accompanying drawings and embodiments. The embodiments described are only a part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0018] This application first needs to solve the problem of low flexibility in the traditional method of collecting telemetry of onboard payload subsystems. Satellite systems generally monitor the operating status of satellites by obtaining onboard telemetry through the ground system control unit. Traditional methods of collecting onboard payload subsystem telemetry generally adopt fixed collection methods or collection methods that are not very flexible and require program modification. Therefore, the ground system control unit cannot timely obtain the operating status of the payload subsystem, and the onboard payload control unit cannot timely obtain the telemetry data fed back by each module, resulting in the inability to implement the onboard disposal mechanism for the health management of the constellation system integrated with the ground and the satellite.

[0019] Secondly, this application aims to solve the problem of space radiation resistance of payload telemetry acquisition. Traditional payload telemetry acquisition generally uses simple single-chip microcomputers to collect, package, and download the system's telemetry. From the perspective of hardware and software design, there is little consideration of the treatment measures for space radiation resistance. When space radiation problems such as single event upsets occur, they can only be recovered by restarting the system. Severe space radiation problems will cause the telemetry acquisition system to be paralyzed, and then lead to loss of control over the monitoring of the payload system status. Figure 1 , the present application provides an embodiment of a flexible and adjustable on-board telemetry acquisition and downlink system, which includes a payload subsystem; the payload subsystem includes a telemetry acquisition unit, an acquisition table storage unit, a telemetry processing unit, a telemetry downlink unit and a module; When there is a feeder link, the telemetry acquisition unit is used to periodically collect the telemetry quantities generated by each module in the payload subsystem and report them to the telemetry processing unit; the acquisition table storage unit is used to store the telemetry acquisition table uploaded by the ground operation and control system; when it is necessary to transmit telemetry quantities through the measurement and control link, the telemetry acquisition unit is used to screen the telemetry quantities required by the ground operation and control system according to the telemetry acquisition table, and the telemetry quantities required for the telemetry downlink of the measurement and control link; the telemetry processing unit is used to receive the telemetry quantities collected by the telemetry acquisition unit, store them on the satellite, form a telemetry quantity set of the payload subsystem, and perform health monitoring on the required telemetry quantities; the telemetry downlink unit is used to package the screened telemetry quantities required by the ground operation and control system in accordance with the required telemetry data packet format and transmit them to the ground operation and control system; When there is no feeder link, the telemetry downlink link between the telemetry downlink unit and the ground operation and control system is used to downlink the telemetry quantities required for satellite health status monitoring to the ground operation and control system. The ground operation and control system uploads the telemetry acquisition table to the acquisition table storage unit in the payload subsystem. Through the telemetry acquisition table, the satellite telemetry is controlled to collect different telemetry quantities from various modules of the payload subsystem; the telemetry information table includes the coordinate information of the telemetry quantities.

[0020] The above technical solution of the present application breaks through the technical difficulty that the measurement and control link rate is low and cannot flexibly transmit the required telemetry data.

[0021] The telemetry acquisition unit, acquisition table storage unit, telemetry processing unit, telemetry downlink unit and other hardware of the present application adopt radiation-resistant devices, and the software running on them adopts reliable loading, parameter redundant storage, thread monitoring and other means to ensure that the acquisition of telemetry measurements of each module, the storage and reading of telemetry acquisition tables, and the downlink of telemetry measurements are stable and reliable under the radiation conditions of outer space, and are not affected by abnormal events such as single particle flips in space, thereby ensuring the accuracy, reliability and stability of the control of the payload subsystem.

[0022] Optionally, the collection table storage unit is used to store the telemetry collection table in a magnetoresistive non-volatile memory after receiving the telemetry collection table registered on the ground operation control system, and use software reinforcement to ensure the reliability of writing and reading the telemetry collection table; software reinforcement includes reliable loading, redundant parameter storage, and thread monitoring.

[0023] Optionally, the telemetry processing unit is configured to read the telemetry collection table from the collection table storage unit and request telemetry quantities from each module in the load subsystem according to the telemetry collection strategy specified in the telemetry collection table; After receiving a telemetry request, each module in the payload subsystem uses software radiation-resistant processing to ensure the stability, reliability, and effectiveness of the reported telemetry. This software radiation-resistant processing includes interface triple-module redundancy and data verification. The ground operation and control system is used to receive telemetry data transmitted from the payload subsystem and autonomously monitor the required telemetry data; the required telemetry data include on-board temperature, voltage, and rotation mechanism.

[0024] Optionally, the telemetry collection strategy is used to instruct the telemetry processing unit to collect specified telemetry quantities from a specified module.

[0025] See also Figure 2 The present application also provides an embodiment of a flexible and adjustable on-board telemetry acquisition and downlink method, which is applicable to the flexible and adjustable on-board telemetry acquisition and downlink system described in the above embodiment, and includes: Through centralized, filterable, and on-demand collection of onboard telemetry, system-level telemetry processing technology, based on software hardening, the satellite's on-orbit health status is monitored using required telemetry, including onboard temperature, voltage, and rotational mechanisms. Software hardening includes reliable loading, redundant parameter storage, and thread monitoring. When the feeder link is available, the telemetry acquisition unit periodically collects the telemetry measurements generated by each module in the payload subsystem and reports them to the telemetry processing unit; the acquisition table storage unit stores the telemetry acquisition table registered by the ground operation and control system; when it is necessary to transmit telemetry measurements through the measurement and control link, the telemetry acquisition unit selects the telemetry measurements required by the ground operation and control system according to the telemetry acquisition table, and uses the telemetry measurements required for the telemetry transmission of the measurement and control link; the telemetry processing unit receives the telemetry measurements collected by the telemetry acquisition unit, stores them on the satellite, forms a telemetry measurement set of the payload subsystem, and performs health monitoring on the required telemetry measurements; the telemetry transmission unit packages the telemetry measurements required by the ground operation and control system obtained by the screening according to the required telemetry data packet format and transmits them to the ground operation and control system; When there is no feeder link, the telemetry data required for satellite health status monitoring is transmitted to the ground operation and control system through the satellite-to-ground measurement and control link between the telemetry downlink unit and the ground operation and control system. The telemetry collection table is uploaded to the collection table storage unit in the payload subsystem through the ground operation and control system. Through the telemetry collection table, the satellite telemetry collection unit is controlled to collect different telemetry data from various modules of the payload subsystem; the telemetry information table includes the coordinate information of the telemetry data.

[0026] Optionally, the ground operation and control system uploads the telemetry collection table to the collection table storage unit in the payload subsystem. After receiving the telemetry collection table uploaded from the ground, the collection table storage unit stores the collection table in a magnetoresistive non-volatile memory and uses software reinforcement to ensure the reliability of writing and reading the telemetry collection table.

[0027] Optionally, the telemetry processing unit reads the telemetry collection table from the collection table storage unit, and requests telemetry quantities from each module in the load subsystem according to the telemetry collection strategy specified in the telemetry collection table.

[0028] Optionally, after receiving the telemetry request, each module in the payload subsystem uses software anti-radiation processing means to ensure the stability, reliability and effectiveness of the reported telemetry; the software anti-radiation processing means include interface triple-module redundancy and data verification.

[0029] Optionally, the telemetry acquisition unit performs satellite-to-ground protocol conversion on the received telemetry data of each module in the payload subsystem; the telemetry downlink unit transmits the protocol-converted telemetry data of the payload subsystem from the satellite to the ground operation and control system.

[0030] Optionally, the ground operation and control system receives telemetry data transmitted from the payload subsystem and autonomously monitors the required telemetry data.

[0031] The onboard telemetry acquisition and downlink system designed in this application has been applied in multiple medium-orbit and low-orbit satellite systems and achieved good results, ensuring the long-term autonomous and stable operation of the constellation.

[0032] In a certain low-orbit satellite system, the designed onboard telemetry acquisition and downlink system can extract and download a subset of all the 8192 bytes of telemetry generated by the system on demand, without changing any of the system's running software. Software hardening measures are implemented to autonomously remove outliers in the system's telemetry. Reliable storage methods ensure stable access to important items such as the acquisition table, even when the system is constantly powered on. This low-orbit constellation is the first large-scale constellation system to implement autonomous onboard payload health management. The designed onboard telemetry acquisition and downlink mechanism ensures the flexibility, reliability, and effectiveness of the entire system's telemetry acquisition, storage, processing, and downlink, laying a solid foundation for the constellation's stable operation.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A flexible and adjustable satellite telemetry acquisition and downlink system, characterized by: It includes a load subsystem; the load subsystem includes a telemetry acquisition unit, an acquisition table storage unit, a telemetry processing unit, a telemetry download unit and a module; When there is a feeder link, the telemetry acquisition unit is used to periodically collect the telemetry quantities generated by each module in the payload subsystem and report them to the telemetry processing unit; the acquisition table storage unit is used to store the telemetry acquisition table uploaded by the ground operation and control system; when it is necessary to transmit telemetry quantities through the measurement and control link, the telemetry acquisition unit is used to screen the telemetry quantities required by the ground operation and control system according to the telemetry acquisition table, and the telemetry quantities required for the telemetry downlink of the measurement and control link; the telemetry processing unit is used to receive the telemetry quantities collected by the telemetry acquisition unit, store them on the satellite, form a telemetry quantity set of the payload subsystem, and perform health monitoring on the required telemetry quantities; the telemetry downlink unit is used to package the screened telemetry quantities required by the ground operation and control system in accordance with the required telemetry data packet format and transmit them to the ground operation and control system; When there is no feeder link, the telemetry downlink link between the telemetry downlink unit and the ground operation and control system is used to downlink the telemetry quantities required for satellite health status monitoring to the ground operation and control system. The ground operation and control system uploads the telemetry acquisition table to the acquisition table storage unit in the payload subsystem. Through the telemetry acquisition table, the satellite telemetry is controlled to collect different telemetry quantities from various modules of the payload subsystem; the telemetry information table includes the coordinate information of the telemetry quantities.

2. The flexible and adjustable satellite telemetry acquisition and downlink system according to claim 1 is characterized in that: The collection table storage unit is used to store the telemetry collection table in a magnetoresistive non-volatile memory after receiving the telemetry collection table from the ground operation and control system, and adopts software reinforcement to ensure the reliability of writing and reading the telemetry collection table; software reinforcement includes reliable loading, redundant parameter storage, and thread monitoring.

3. The flexible and adjustable satellite telemetry acquisition and downlink system according to claim 1 is characterized in that: The telemetry processing unit is used to read the telemetry collection table from the collection table storage unit and request telemetry data from each module in the load subsystem according to the telemetry collection strategy specified in the telemetry collection table; After receiving a telemetry request, each module in the payload subsystem uses software radiation-resistant processing to ensure the stability, reliability, and effectiveness of the reported telemetry. This software radiation-resistant processing includes interface triple-module redundancy and data verification. The ground operation and control system is used to receive telemetry data transmitted from the payload subsystem and autonomously monitor the required telemetry data; the required telemetry data include on-board temperature, voltage, and rotation mechanism.

4. The flexible and adjustable satellite telemetry acquisition and downlink system according to claim 3 is characterized in that: The telemetry collection strategy is used to instruct the telemetry processing unit to collect specified telemetry quantities from specified modules.

5. A flexible and adjustable satellite telemetry acquisition and downlink method, applicable to the flexible and adjustable satellite telemetry acquisition and downlink system according to any one of claims 1 to 4, characterized in that: include: Through centralized, filterable, and on-demand collection of onboard telemetry, system-level telemetry processing technology, based on software hardening, the satellite's on-orbit health status is monitored using required telemetry, including onboard temperature, voltage, and rotational mechanisms. Software hardening includes reliable loading, redundant parameter storage, and thread monitoring. When the feeder link is available, the telemetry acquisition unit periodically collects the telemetry data generated by each module in the payload subsystem and reports it to the telemetry processing unit. The acquisition table storage unit stores the telemetry acquisition table registered by the ground operation and control system. When telemetry data needs to be transmitted via the measurement and control link, the telemetry acquisition unit selects the telemetry data required by the ground operation and control system based on the telemetry acquisition table, and uses this data as the telemetry data required for the telemetry transmission of the measurement and control link. The telemetry processing unit receives the telemetry data collected by the telemetry acquisition unit, stores them onboard, forms a telemetry data set for the payload subsystem, and performs health monitoring on the required telemetry data. The telemetry downlink unit packages the screened telemetry data required by the ground operation and control system in the required telemetry data packet format and downlinks it to the ground operation and control system; When there is no feeder link, the telemetry data required for satellite health status monitoring is transmitted to the ground operation and control system through the satellite-to-ground measurement and control link between the telemetry downlink unit and the ground operation and control system. The telemetry collection table is uploaded to the collection table storage unit in the payload subsystem through the ground operation and control system. Through the telemetry collection table, the satellite telemetry collection unit is controlled to collect different telemetry data from various modules of the payload subsystem; the telemetry information table includes the coordinate information of the telemetry data.

6. The flexible and adjustable satellite telemetry acquisition and downlink method according to claim 5, characterized in that: The ground operation and control system uploads the telemetry collection table to the collection table storage unit in the payload subsystem. After receiving the telemetry collection table uploaded by the ground, the collection table storage unit stores the collection table in a magnetoresistive non-volatile memory and uses software reinforcement to ensure the reliability of writing and reading the telemetry collection table.

7. The flexible and adjustable satellite telemetry acquisition and downlink method according to claim 5, characterized in that: The telemetry processing unit reads the telemetry collection table from the collection table storage unit and requests telemetry data from each module in the load subsystem according to the telemetry collection strategy specified in the telemetry collection table.

8. The flexible and adjustable satellite telemetry acquisition and downlink method according to claim 7, characterized in that: After receiving the telemetry request, each module in the payload subsystem uses software anti-radiation processing measures to ensure the stability, reliability and effectiveness of the reported telemetry; the software anti-radiation processing measures include interface triple-mode redundancy and data verification.

9. The flexible and adjustable satellite telemetry acquisition and downlink method according to claim 8, characterized in that: The telemetry acquisition unit converts the received telemetry data of each module in the payload subsystem into satellite-to-ground protocol; The telemetry downlink unit transmits the telemetry data of the payload subsystem that has undergone protocol conversion from the satellite to the ground operation and control system.

10. The flexible and adjustable satellite telemetry acquisition and downlink method according to claim 9, characterized in that: The ground operation and control system receives the telemetry data transmitted by the payload subsystem and autonomously monitors the required telemetry data.

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