A flexible and adjustable on-board telemetry acquisition and downlink system and method

Abstract

This application discloses a flexible and adjustable on-board telemetry acquisition and downlink system and method. The system includes: a telemetry acquisition unit for periodically acquiring telemetry data generated by various modules in the payload subsystem when a power supply link is available; an acquisition table storage unit for storing telemetry acquisition tables uploaded to the ground control system; a telemetry acquisition unit for filtering telemetry data required by the ground control system based on the telemetry acquisition tables when it is necessary to downlink telemetry data via the telemetry and control link; a telemetry processing unit for receiving the telemetry data acquired by the telemetry acquisition unit, storing it on-board to form a telemetry data set for the payload subsystem, and performing health monitoring on the required telemetry data; and a telemetry downlink unit for downlinking the selected telemetry data required by the ground control system to the ground control system. This application improves the reliability of the satellite system's on-orbit operation and enables refined management of satellite on-orbit control.

Description

Technical Field

[0001] This 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 Technology

[0002] The acquisition and processing of onboard payload telemetry data has always been a hot research area in satellite control. Onboard payload telemetry provides direct feedback on the satellite's operational health status. When anomalies occur in satellite telemetry data, ground-based commands are typically required for processing. Therefore, the accurate and timely transmission of telemetry data is crucial for satellite safety. Simultaneously, the telemetry acquisition process in space is susceptible to cosmic ray radiation, which can cause anomalies in the acquisition process and lead to a loss of control over the satellite's operational status. Therefore, researching stable, reliable, and flexible telemetry acquisition design techniques is a popular research topic in satellite control.

[0003] Existing on-board telemetry acquisition methods mostly involve each unit or module acquiring its own telemetry data independently. These acquisition processes are completely independent of each other, and the acquisition of telemetry data is controlled by software loaded into the chip. When different telemetry data needs to be acquired according to different operating conditions, different application programs need to be recompiled and loaded. This results in inconvenience in using on-orbit telemetry acquisition, weak collaborative acquisition capability of the payload system, and an inability to provide timely, variable, and flexible system-wide health status feedback parameters for the increasingly important on-orbit health status management of satellites. In addition, existing telemetry acquisition technologies do not consider telemetry anomalies caused by single-event upsets, outliers, etc., which can lead to misjudgments of the satellite's health status. Summary of the Invention

[0004] In view of this, this 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. By means of on-orbit adjustable telemetry acquisition, diverse downlink channels and radiation-resistant design, the reliability of satellite system operation in orbit is improved, and refined management of satellite on-orbit control is realized.

[0005] This application discloses 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 modules;

[0006] When a power supply link is available, the telemetry acquisition unit periodically acquires telemetry data generated by various modules in the payload subsystem and reports it to the telemetry processing unit. The acquisition table storage unit stores the telemetry acquisition tables uploaded by the ground control system. When telemetry data needs to be transmitted down the telemetry link, the telemetry acquisition unit filters the telemetry data required by the ground control system based on the telemetry acquisition tables, providing the necessary telemetry data for the telemetry transmission via the telemetry link. The telemetry processing unit receives the telemetry data acquired by the telemetry acquisition unit, stores it on the satellite, forms a telemetry data set for the payload subsystem, and performs health monitoring on the required telemetry data. The telemetry transmission unit packages the filtered telemetry data required by the ground control system according to the required telemetry data packet format and transmits it to the ground control system.

[0007] When a power supply link is unavailable, the telemetry data required for satellite health monitoring is transmitted to the ground control system via the satellite-to-ground telemetry and control link between the telemetry downlink unit and the ground control system. The ground control system then uploads the telemetry data acquisition table to the acquisition table storage unit in the payload subsystem. Using the telemetry data acquisition table, the satellite telemetry acquisition unit is controlled to acquire different telemetry data from various modules of the payload subsystem. The telemetry information table includes the coordinate information of the telemetry data.

[0008] Furthermore, the data acquisition unit is used to store the telemetry data acquisition table in a magnetoresistive non-volatile memory after receiving it from the ground control system, and to ensure the reliability of writing and reading the telemetry data acquisition table by means of software hardening; the software hardening includes reliable loading, redundant parameter storage, and thread monitoring.

[0009] Furthermore, the telemetry processing unit is used to read the telemetry acquisition table from the acquisition table storage unit and request telemetry data from each module in the load subsystem according to the telemetry acquisition strategy specified in the telemetry acquisition table.

[0010] Each module in the payload subsystem is used to ensure the stability, reliability, and effectiveness of the reported telemetry data after receiving a telemetry request through software radiation-resistant processing methods. The software radiation-resistant processing methods include interface triple redundancy and data verification.

[0011] The ground control system is used to receive telemetry data transmitted from the payload subsystem and to autonomously monitor the required telemetry data, including onboard temperature, voltage, and rotation mechanisms.

[0012] Furthermore, the telemetry acquisition strategy is used to instruct the telemetry processing unit to acquire specified telemetry data from specified modules.

[0013] This application also discloses a flexible and adjustable on-board telemetry acquisition and downlink method, applicable to the aforementioned flexible and adjustable on-board telemetry acquisition and downlink system, comprising:

[0014] By employing a centralized, filterable, and on-demand system-level telemetry processing technology for onboard telemetry, and based on software hardening, the system monitors the satellite's on-orbit operational health status through the required telemetry measurements. The required telemetry measurements include onboard temperature, voltage, and rotating mechanisms. Software hardening includes reliable loading, redundant parameter storage, and thread monitoring.

[0015] When a power supply link is available, the telemetry acquisition unit periodically acquires 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 tables uploaded by the ground control system. When telemetry data needs to be transmitted down the telemetry link, the telemetry acquisition unit filters the telemetry data required by the ground control system based on the telemetry acquisition tables, providing the telemetry data required for telemetry transmission via the telemetry link. The telemetry processing unit receives the telemetry data acquired by the telemetry acquisition unit, stores it on the satellite, forms the telemetry data set of the payload subsystem, and performs health monitoring on the required telemetry data. The telemetry transmission unit packages the selected telemetry data required by the ground control system according to the required telemetry data packet format and transmits it to the ground control system.

[0016] When a power supply link is unavailable, the telemetry data required for satellite health monitoring is transmitted to the ground control system via the satellite-to-ground telemetry and control link between the telemetry downlink unit and the ground control system. The ground control system then uploads the telemetry data acquisition table to the acquisition table storage unit in the payload subsystem. Using the telemetry data acquisition table, the satellite telemetry acquisition unit is controlled to acquire different telemetry data from various modules of the payload subsystem. The telemetry information table includes the coordinate information of the telemetry data.

[0017] Furthermore, the ground control system uploads telemetry data acquisition tables to the data acquisition table storage unit in the payload subsystem. After receiving the telemetry data acquisition tables uploaded from the ground, the data acquisition table storage unit stores the data acquisition tables in a magnetoresistive non-volatile memory and uses software hardening to ensure the reliability of writing and reading the telemetry data acquisition tables.

[0018] Furthermore, the telemetry processing unit reads the telemetry acquisition table from the acquisition table storage unit and requests telemetry data from each module in the load subsystem according to the telemetry acquisition strategy specified in the telemetry acquisition table.

[0019] Furthermore, after receiving telemetry requests, each module in the payload subsystem ensures the stability, reliability, and effectiveness of the reported telemetry through software radiation-resistant processing methods; these software radiation-resistant processing methods include interface triple redundancy and data verification.

[0020] Furthermore, the telemetry acquisition unit performs satellite-to-ground protocol conversion on the telemetry data received from each module of 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.

[0021] Furthermore, the ground control system receives telemetry data transmitted from the payload subsystem and autonomously monitors the required telemetry data.

[0022] Due to the adoption of the above technical solutions, this application has the following advantages: Actual on-orbit operation tests have demonstrated that the on-demand telemetry acquisition and control method for the on-board payload subsystem, considering the system perspective, achieves refined control of satellite system payload telemetry acquisition. The designed telemetry acquisition method based on telemetry acquisition tables is of great significance for improving the establishment of an integrated satellite-ground autonomous constellation health management mechanism during satellite operation. Simultaneously, the hardware of the on-board telemetry acquisition and downlink system, including the telemetry acquisition unit, acquisition table storage unit, telemetry processing unit, and telemetry downlink unit, all employ radiation-resistant devices. The software running on these devices utilizes radiation-resistant measures such as reliable loading, redundant parameter storage, and thread monitoring, ensuring the stability of the system's on-orbit operation and strongly supporting the long-term operation of the constellation in an autonomous and stable state. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a block diagram of a flexible and adjustable on-board telemetry acquisition and downlink system according to an embodiment of this application.

[0025] Figure 2 This is a flowchart illustrating a flexible and adjustable on-board telemetry acquisition and downlink method according to an embodiment of this application. Detailed Implementation

[0026] The present application will be further described in conjunction with the accompanying drawings and embodiments. The described embodiments are only some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of the present application.

[0027] This application aims to address the problem of low flexibility in acquiring telemetry data from onboard payload subsystems using traditional methods. Satellite systems typically monitor their operational status by obtaining onboard telemetry data from ground control units. Traditional methods for acquiring onboard payload subsystem telemetry data generally employ fixed acquisition methods or inflexible methods involving modified programs. Consequently, ground control units cannot obtain timely information on the operational status of the payload subsystems, and onboard payload control units cannot receive timely telemetry data feedback from various modules. This hinders the implementation of an integrated onboard health management and response mechanism for the constellation system.

[0028] This application also addresses the space radiation resistance problem in payload telemetry acquisition. Traditional payload telemetry acquisition typically uses simple microcontrollers to collect, package, and download telemetry data. There is limited consideration given to handling space radiation resistance issues in both hardware and software design. When space radiation problems such as single-event upsets occur, recovery can only be achieved by restarting the system. Severe space radiation problems can paralyze the telemetry acquisition system, leading to a loss of control over the payload system's status. See [link to relevant documentation] Figure 1 This 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 modules;

[0029] When a power supply link is available, the telemetry acquisition unit periodically acquires telemetry data generated by various modules in the payload subsystem and reports it to the telemetry processing unit. The acquisition table storage unit stores the telemetry acquisition tables uploaded by the ground control system. When telemetry data needs to be transmitted down the telemetry link, the telemetry acquisition unit filters the telemetry data required by the ground control system based on the telemetry acquisition tables, providing the necessary telemetry data for the telemetry transmission via the telemetry link. The telemetry processing unit receives the telemetry data acquired by the telemetry acquisition unit, stores it on the satellite, forms a telemetry data set for the payload subsystem, and performs health monitoring on the required telemetry data. The telemetry transmission unit packages the filtered telemetry data required by the ground control system according to the required telemetry data packet format and transmits it to the ground control system.

[0030] When a power supply link is unavailable, the telemetry data required for satellite health monitoring is transmitted to the ground control system via the satellite-to-ground telemetry and control link between the telemetry downlink unit and the ground control system. The ground control system then uploads the telemetry data acquisition table to the acquisition table storage unit in the payload subsystem. Using the telemetry data acquisition table, the satellite telemetry acquisition unit is controlled to acquire different telemetry data from various modules of the payload subsystem. The telemetry information table includes the coordinate information of the telemetry data.

[0031] The above-mentioned technical solution of this application overcomes the technical problem of low telemetry and control link rate, which prevents flexible transmission of required telemetry data.

[0032] The hardware of this application, including the telemetry acquisition unit, acquisition table storage unit, telemetry processing unit, and telemetry downlink unit, adopts radiation-resistant devices. The software running on it employs reliable loading, redundant parameter storage, and thread monitoring to ensure that the acquisition of telemetry data from each module, the storage and retrieval of telemetry acquisition tables, and the downlink of telemetry data are stable and reliable under space radiation conditions, unaffected by abnormal events such as space single-event upsets, thus ensuring the accuracy, reliability, and stability of the control of the payload subsystem.

[0033] Optionally, the data acquisition unit is used to store the telemetry data acquisition table in a magnetoresistive non-volatile memory after receiving the telemetry data acquisition table from the ground operation and control system, and to ensure the reliability of writing and reading the telemetry data acquisition table by means of software hardening; the software hardening includes reliable loading, redundant parameter storage, and thread monitoring.

[0034] Optionally, the telemetry processing unit is used to read the telemetry acquisition table from the acquisition table storage unit and request telemetry data from each module in the load subsystem according to the telemetry acquisition strategy specified in the telemetry acquisition table.

[0035] Each module in the payload subsystem is used to ensure the stability, reliability, and effectiveness of the reported telemetry data after receiving a telemetry request through software radiation-resistant processing methods. The software radiation-resistant processing methods include interface triple redundancy and data verification.

[0036] The ground control system is used to receive telemetry data transmitted from the payload subsystem and to autonomously monitor the required telemetry data, including onboard temperature, voltage, and rotation mechanisms.

[0037] Optionally, the telemetry acquisition strategy is used to instruct the telemetry processing unit to acquire specified telemetry data from a specified module.

[0038] See Figure 2 This application also provides an embodiment of a flexible and adjustable on-board telemetry acquisition and downlink method, applicable to the flexible and adjustable on-board telemetry acquisition and downlink system described in the above embodiments, comprising:

[0039] By employing a centralized, filterable, and on-demand system-level telemetry processing technology for onboard telemetry, and based on software hardening, the system monitors the satellite's on-orbit operational health status through the required telemetry measurements. The required telemetry measurements include onboard temperature, voltage, and rotating mechanisms. Software hardening includes reliable loading, redundant parameter storage, and thread monitoring.

[0040] When a power supply link is available, the telemetry acquisition unit periodically acquires 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 tables uploaded by the ground control system. When telemetry data needs to be transmitted down the telemetry link, the telemetry acquisition unit filters the telemetry data required by the ground control system based on the telemetry acquisition tables, providing the telemetry data required for telemetry transmission via the telemetry link. The telemetry processing unit receives the telemetry data acquired by the telemetry acquisition unit, stores it on the satellite, forms the telemetry data set of the payload subsystem, and performs health monitoring on the required telemetry data. The telemetry transmission unit packages the selected telemetry data required by the ground control system according to the required telemetry data packet format and transmits it to the ground control system.

[0041] When a power supply link is unavailable, the telemetry data required for satellite health monitoring is transmitted to the ground control system via the satellite-to-ground telemetry and control link between the telemetry downlink unit and the ground control system. The ground control system then uploads the telemetry data acquisition table to the acquisition table storage unit in the payload subsystem. Using the telemetry data acquisition table, the satellite telemetry acquisition unit is controlled to acquire different telemetry data from various modules of the payload subsystem. The telemetry information table includes the coordinate information of the telemetry data.

[0042] Optionally, the ground control system uploads telemetry data acquisition tables to the data acquisition table storage unit in the payload subsystem. After receiving the telemetry data acquisition tables uploaded from the ground, the data acquisition table storage unit stores the data acquisition tables in a magnetoresistive non-volatile memory and uses software hardening to ensure the reliability of writing and reading the telemetry data acquisition tables.

[0043] Optionally, the telemetry processing unit reads the telemetry acquisition table from the acquisition table storage unit and requests telemetry data from each module in the load subsystem according to the telemetry acquisition strategy specified in the telemetry acquisition table.

[0044] Optionally, 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 data; the software radiation-resistant processing includes interface triple redundancy and data verification.

[0045] Optionally, the telemetry acquisition unit performs satellite-to-ground protocol conversion on the telemetry data received from each module of the payload subsystem; the telemetry downlink unit transmits the telemetry data of the payload subsystem after protocol conversion from satellite to ground control system.

[0046] Optionally, the ground control system receives telemetry data transmitted from the payload subsystem and autonomously monitors the required telemetry data.

[0047] The on-board telemetry acquisition and downlink system designed in this application has been applied in multiple medium-Earth orbit and low-Earth orbit satellite systems and has achieved good results, ensuring the long-term autonomous and stable operation of the constellation.

[0048] In a certain low-Earth orbit satellite system, the designed on-board telemetry acquisition and downlink system can extract and package a subset of all telemetry data (8192 bytes) without altering any of the system's operating software, on demand. The software hardening measures employed autonomously eliminate outliers in the telemetry data generated by the system, and the reliable storage methods ensure the stability of important table entries, such as the acquisition tables, even with the system continuously powered on. This low-Earth orbit constellation is the first large-scale constellation system to implement autonomous health management for on-board payloads. The designed on-board telemetry acquisition and downlink mechanism guarantees the flexibility, reliability, and effectiveness of the entire system's telemetry acquisition, storage, processing, and downlink, laying a solid foundation for the stable operation of the constellation.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them. Although this application has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this application. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this application should be covered within the protection scope of the claims of this application.

Claims

1. A flexible and adjustable on-board telemetry acquisition and downlink system, characterized in that, It includes a load subsystem; the load subsystem includes a telemetry acquisition unit, an acquisition table storage unit, a telemetry processing unit, a telemetry downlink unit, and modules; When a power supply link is available, the telemetry acquisition unit periodically acquires telemetry data generated by various modules in the payload subsystem and reports it to the telemetry processing unit. The acquisition table storage unit stores the telemetry acquisition tables uploaded by the ground control system. When telemetry data needs to be transmitted down the telemetry link, the telemetry acquisition unit filters the telemetry data required by the ground control system based on the telemetry acquisition tables, providing the necessary telemetry data for the telemetry transmission via the telemetry link. The telemetry processing unit receives the telemetry data acquired by the telemetry acquisition unit, stores it on the satellite, forms a telemetry data set for the payload subsystem, and performs health monitoring on the required telemetry data. The telemetry transmission unit packages the filtered telemetry data required by the ground control system according to the required telemetry data packet format and transmits it to the ground control system. When a power supply link is unavailable, the telemetry data required for satellite health monitoring is transmitted to the ground control system via the satellite-to-ground telemetry and control link between the telemetry downlink unit and the ground control system. The ground control system then uploads the telemetry data acquisition table to the acquisition table storage unit in the payload subsystem. Using the telemetry data acquisition table, the satellite telemetry acquisition unit is controlled to acquire different telemetry data from various modules of the payload subsystem. The telemetry information table includes the coordinate information of the telemetry data. The data acquisition unit is used to store the telemetry data acquisition data in a magnetoresistive non-volatile memory after receiving it from the ground control system. Software hardening is used to ensure the reliability of writing and reading the telemetry data acquisition data. The software hardening includes reliable loading, redundant parameter storage, and thread monitoring. The telemetry processing unit is used to read the telemetry acquisition table from the acquisition table storage unit and request telemetry data from each module in the load subsystem according to the telemetry acquisition strategy specified in the telemetry acquisition table. Each module in the payload subsystem is used to ensure the stability, reliability, and effectiveness of the reported telemetry data after receiving a telemetry request through software radiation-resistant processing methods. The software radiation-resistant processing methods include interface triple redundancy and data verification. The ground control system is used to receive telemetry data transmitted from the payload subsystem and to autonomously monitor the required telemetry data, including onboard temperature, voltage, and rotation mechanisms.

2. The flexible and adjustable on-board telemetry acquisition and downlink system according to claim 1, characterized in that, The telemetry acquisition strategy is used to instruct the telemetry processing unit to acquire specified telemetry data from a specified module.

3. A flexible and adjustable on-board telemetry acquisition and downlink method, applicable to the flexible and adjustable on-board telemetry acquisition and downlink system described in claim 1 or 2, characterized in that, include: By employing a centralized, filterable, and on-demand system-level telemetry processing technology for onboard telemetry, and based on software hardening, the system monitors the satellite's on-orbit operational health status through the required telemetry measurements. The required telemetry measurements include onboard temperature, voltage, and rotating mechanisms. Software hardening includes reliable loading, redundant parameter storage, and thread monitoring. When a power supply link is available, the telemetry acquisition unit periodically acquires 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 tables uploaded by the ground control system; when telemetry data needs to be transmitted down the telemetry link, the telemetry acquisition unit filters the telemetry data required by the ground control system according to the telemetry acquisition table, and transmits the telemetry data required for the telemetry transmission of the telemetry link; the telemetry processing unit receives the telemetry data acquired by the telemetry acquisition unit, stores it on the satellite, forms the telemetry data set of the payload subsystem, and performs health monitoring on the required telemetry data; The telemetry downlink unit packages the selected telemetry data required by the ground operation and control system according to the required telemetry data packet format and downlinks it to the ground operation and control system. When a power supply link is unavailable, the telemetry data required for satellite health monitoring is transmitted to the ground control system via the satellite-to-ground telemetry and control link between the telemetry downlink unit and the ground control system. The ground control system then uploads the telemetry data acquisition table to the acquisition table storage unit in the payload subsystem. Using the telemetry data acquisition table, the satellite telemetry acquisition unit is controlled to acquire different telemetry data from various modules of the payload subsystem. The telemetry information table includes the coordinate information of the telemetry data.

4. The flexible and adjustable on-board telemetry acquisition and downlink method according to claim 3, characterized in that, The telemetry acquisition unit performs satellite-to-ground protocol conversion on the telemetry data received from each module in the payload subsystem; The telemetry downlink unit transmits the telemetry data from the payload subsystem, which has undergone protocol conversion, from the satellite to the ground control system.

5. The flexible and adjustable on-board telemetry acquisition and downlink method according to claim 4, characterized in that, The ground control system receives telemetry data transmitted from the payload subsystem and autonomously monitors the required telemetry data.

Images