On-demand telemetering method and system for working state of electric push of satellite

Abstract

The invention provides an on-demand telemetering method and system for a satellite electric push working state. The method comprises the following steps: S1, integrating an on-demand telemetering protocol in a satellite control system; s2, enabling the FPGA to analyze an on-demand telemetering instruction sent by the ground and complete acquisition, and using a spaceborne computer to complete packing storage; s3, when the ground control center needs to access the on-demand telemetry data, enabling the spaceborne computer to retrieve and recombine the stored data packet into a telemetry frame, and sending the telemetry frame to the ground through a satellite communication system; and S4, enabling the ground to receive and analyze the telemetry data, and automatically adjusting the sending frequency of the data if abnormity is monitored. According to the on-demand telemetering method, detailed working state data can be provided, a ground control center can carry out deep analysis conveniently, and faults of the electric propulsion system can be diagnosed rapidly and accurately.

Description

Technical Field

[0001] The present invention relates to the field of satellite telemetry, and more particularly, to a method and system for on-demand telemetry of the working state of a satellite electric thruster. Background Art

[0002] Satellite electric propulsion systems, with their excellent energy efficiency and long operating life, have become a key component of modern spacecraft, especially when performing precise orbit adjustments, life extension operations, and deep space exploration missions. These systems typically use ion or Hall effect thrusters, which can provide continuous small thrust, effectively changing the orbit or attitude of the satellite while significantly reducing the amount of propellant carried and the total weight of the satellite.

[0003] Although electric propulsion systems offer significant advantages, their efficient operation depends on precise condition monitoring. Traditional telemetry methods usually involve sending data at preset time intervals. While this method can provide the necessary information, it cannot meet the ground control center's demand for real-time data. In emergency situations, such as system failures or performance degradation, periodic telemetry may not provide critical information in a timely manner, thus affecting the rapid diagnosis and response to the state of the electric propulsion system. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a method and system for on-demand telemetry of the working state of a satellite electric thruster.

[0005] According to a method for on-demand telemetry of the working state of a satellite electric thruster provided by the present invention, it includes:

[0006] Step S1: Integrate an on-demand telemetry protocol into the satellite control system;

[0007] The on-demand telemetry protocol enables the ground control center to request specific telemetry data;

[0008] Step S2: Make the FPGA parse the on-demand telemetry instructions sent from the ground and complete the acquisition, and use the on-board computer to complete packet storage;

[0009] Step S3: When the ground control center needs to access the on-demand telemetry data, make the on-board computer retrieve and reorganize the stored data packets into telemetry frames and send them to the ground through the satellite communication system;

[0010] Step S4: Make the ground receive and analyze the telemetry data. If an anomaly is detected, automatically adjust the data transmission frequency.

[0011] Preferably, the step S2 includes the following sub-steps:

[0012] Step S2.1: In the on-demand telemetry mode, the ground sends an on-demand telemetry instruction, selects the channel numbers corresponding to the electric propulsion working parameters of the telemetry to be on-demand, and classifies them;

[0013] Step S2.2: After the FPGA parses the content of the on-demand telemetry instruction, it uses the communication interface to send the data to the collector;

[0014] Step S2.3: After the telemetry acquisition is completed, the on-board computer packs the telemetry collected through the channels and stores them in the on-board computer-readable memory in the order of channel numbers.

[0015] Preferably, the said step S3 includes:

[0016] When the ground control center needs to access the on-demand telemetry data, it issues a specific instruction to require the on-board computer on the satellite to perform a data downlink operation; the on-board computer retrieves the on-demand telemetry data packets collected and stored within the specified time period from the readable memory; reorganizes the said on-demand telemetry data packets into telemetry frames and sends them back to the ground through the satellite's communication system.

[0017] Preferably, the said step S4 includes the following sub-steps:

[0018] Step S4.1: Establish a data processing and analysis center on the ground, receive the telemetry data from the satellite, and further analyze the working state of the electric propulsion and provide decision support;

[0019] Step S4.2: When an abnormal signal is detected, automatically increase the data transmission frequency or send more detailed diagnostic information, so that the ground control center can evaluate the situation and take actions.

[0020] Preferably, the electric propulsion working parameters include the working state of the thruster, the fuel level, and the system temperature;

[0021] The categories of telemetry information include:

[0022] - The operating state of the electric propulsion system;

[0023] - The state of the uplink channel;

[0024] - The state of the downlink channel;

[0025] - The state of the electric thruster;

[0026] - The state of the pipeline system;

[0027] - The state of the safety mode;

[0028] - The state of task execution.

[0029] Preferably, if the category of the telemetry information is: electric propulsion system operation status, uplink channel status, downlink channel status or task execution status, the telemetry data is processed into status telemetry data after performing a digital CRC check according to the category of the telemetry information;

[0030] If the category of the telemetry information is: electric thruster status, pipeline system status, or safety mode status, the generated status telemetry data is 0 or 1.

[0031] Preferably, the step S2.2 includes:

[0032] After receiving the on-demand telemetry instruction, the integrated electronics switches to the on-demand telemetry mode, and the FPGA executes the parallel processing command to enable the collector to start multi-channel data acquisition; the acquisition order is consistent with the channel number order, and the address information of the high-speed acquisition channel is the address information corresponding to the channel number of the on-demand telemetry.

[0033] Preferably, the step S2.3 includes:

[0034] When the telemetry data acquisition process is completed, the onboard computer organizes and packages the telemetry data collected through the high-speed acquisition channel according to the specific format of the telemetry data packet, and stores it based on the channel number and sequence to which it belongs.

[0035] Preferably, if the real-time operating data of the electric propulsion system component exceeds the corresponding threshold range, the operating status of the component is marked as a fault state, and the status telemetry data is marked as 1; if the real-time operating data of each component is within the corresponding threshold range, the operating status of the electric propulsion system component is marked as a normal state, and the status telemetry is marked as 0.

[0036] According to the present invention, a satellite electric propulsion working state on-demand telemetry system is provided, comprising:

[0037] Module M1: Integration of on-demand telemetry protocols in satellite control systems;

[0038] The on-demand telemetry protocol enables a ground control center to request specific telemetry data;

[0039] Module M2: enables the FPGA to parse and collect on-demand telemetry commands sent from the ground, and uses the onboard computer to package and store them.

[0040] Module M3: When the ground control center needs to access on-demand telemetry data, it enables the onboard computer to retrieve and reassemble the stored data packets into telemetry frames and send them to the ground via the satellite communication system;

[0041] Module M4: enables the ground to receive and analyze telemetry data, and automatically adjusts the data transmission frequency if any abnormality is detected.

[0042] Preferably, the module M2 includes the following sub - modules:

[0043] Module M2.1: In the on - demand telemetry mode, the ground sends an on - demand telemetry instruction to select the channel numbers corresponding to the electric propulsion working parameters of the telemetry to be on - demanded and classify them;

[0044] Module M2.2: After the FPGA parses the content of the on - demand telemetry instruction, it uses the communication interface to send the data to the collector;

[0045] Module M2.3: After the telemetry acquisition is completed, the on - board computer packs the telemetry collected through the channel and stores it in the on - board computer - readable memory in the order of the channel numbers.

[0046] Preferably, the module M3 includes:

[0047] When the ground control center needs to access the on - demand telemetry data, it issues a specific instruction to require the on - board computer on the satellite to perform a data downlink operation; the on - board computer retrieves the on - demand telemetry data packets collected and stored within the specified time period from the readable memory; reorganizes the on - demand telemetry data packets into telemetry frames and sends them back to the ground through the satellite's communication system.

[0048] Preferably, the module M4 includes the following sub - modules:

[0049] Module M4.1: Establish a data processing and analysis center on the ground to receive the telemetry data from the satellite and further analyze the electric propulsion working status and provide decision support;

[0050] Module M4.2: When an abnormal signal is detected, automatically increase the data transmission frequency or send more detailed diagnostic information so that the ground control center can evaluate the situation and take actions.

[0051] Preferably, the electric propulsion working parameters include thruster working status, fuel level, and system temperature;

[0052] The categories of telemetry information include:

[0053] - Electric propulsion system operating status;

[0054] - Uplink channel status;

[0055] - Downlink channel status;

[0056] - Electric thruster status;

[0057] - Pipeline system status;

[0058] - Safe mode status;

[0059] - Mission execution status.

[0060] Preferably, if the category of the telemetry information is: electric propulsion system operation status, uplink channel status, downlink channel status or task execution status, the telemetry data is processed into status telemetry data after performing a digital CRC check according to the category of the telemetry information;

[0061] If the category of the telemetry information is: electric thruster status, pipeline system status, or safety mode status, the generated status telemetry data is 0 or 1.

[0062] Preferably, the module M2.2 includes:

[0063] After receiving the on-demand telemetry instruction, the integrated electronics switches to the on-demand telemetry mode, and the FPGA executes the parallel processing command to enable the collector to start multi-channel data acquisition; the acquisition order is consistent with the channel number order, and the address information of the high-speed acquisition channel is the address information corresponding to the channel number of the on-demand telemetry.

[0064] Preferably, the module M2.3 includes:

[0065] When the telemetry data acquisition process is completed, the onboard computer organizes and packages the telemetry data collected through the high-speed acquisition channel according to the specific format of the telemetry data packet, and stores it based on the channel number and sequence to which it belongs.

[0066] Preferably, if the real-time operating data of the electric propulsion system component exceeds the corresponding threshold range, the operating status of the component is marked as a fault state, and the status telemetry data is marked as 1; if the real-time operating data of each component is within the corresponding threshold range, the operating status of the electric propulsion system component is marked as a normal state, and the status telemetry is marked as 0.

[0067] Compared with the prior art, the present invention has the following beneficial effects:

[0068] 1. The method provided by the present invention enables the ground control center to flexibly initiate on-demand requests and obtain relevant data according to the different stages and specific needs of the satellite electric propulsion system, thereby improving the flexibility and adaptability of operations.

[0069] 2. The on-demand telemetry method provided by the present invention can provide detailed operating status data, which helps the ground control center to conduct in-depth analysis and quickly and accurately diagnose faults in the electric propulsion system.

[0070] Other beneficial effects of the present invention will be explained through the introduction of specific technical features and technical solutions in the specific implementation methods. Those skilled in the art should be able to understand the beneficial technical effects brought about by the introduction of these technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0072] Figure 1 It is a schematic diagram of the telemetry acquisition operation in the embodiment of the present invention.

[0073] Figure 2 It is a schematic diagram of the method implementation process in the embodiment of the present invention. Detailed implementation manners

[0074] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0075] Referring to Figure 1 and Figure 2 As shown, the purpose of the present invention is to provide a on-demand telemetry method for the working state of an electric thruster, which can realize real-time monitoring and management of the operating state of the satellite electric propulsion system and achieve accurate acquisition of the working state of the satellite electric propulsion system. The specific steps are as follows:

[0076] Step S1: Integrate the on-demand telemetry protocol in the satellite control system to allow the ground control center to send telemetry requests;

[0077] Step S2: In the on-demand telemetry mode, the ground sends an on-demand telemetry instruction to select the channel number corresponding to the telemetry of the electric thruster working parameters to be on-demand and classify them;

[0078] Step S3: After the FPGA analyzes the content of the on-demand telemetry instruction, it uses the communication interface to send the data to the collector.

[0079] Step S4: After the telemetry acquisition is completed, the on-board computer will packetize the telemetry collected through the channel and store it in the on-board computer-readable memory in the order of the channel numbers;

[0080] Step S5: When the ground control center needs to access the on-demand telemetry data, it will issue a specific instruction to require the on-board computer on the satellite to perform the data downlink operation. The on-board computer will retrieve the on-demand telemetry data packets collected and stored within the specified time period from the readable memory. These data packets will be reorganized into telemetry frames and sent back to the ground through the satellite's communication system;

[0081] Step S6: Establish a data processing and analysis center on the ground to receive the telemetry data from the satellite and further analyze the working state of the electric thruster and provide decision support;

[0082] Step S7: When an abnormal signal is detected, automatically increase the data transmission frequency or send more detailed diagnostic information so that the ground control center can quickly assess the situation and take actions.

[0083] A on-demand telemetry protocol designed by the present invention allows the ground control center to request specific telemetry data as needed; the operating parameters of the electric propulsion to be collected are the working status of the thruster, fuel level, system temperature, etc.

[0084] The telemetry information channel numbers are as follows: 1#: Operating status of the electric propulsion system; 2#: Status of the uplink channel; 3#: Status of the downlink channel; 4#: Status of the electric thruster; 5#: Status of the pipeline system; 6#: Status of the safety mode; 7#: Status of the mission execution.

[0085] If the categories of the telemetry information are 1#, 2#, 3# and 7#, the telemetry data will be processed into status telemetry data after digital CRC check according to the categories of the telemetry information.

[0086] If the categories of the telemetry information are 4#, 5# and 6#, the generated status telemetry data is 0 or 1;

[0087] After receiving the on-demand telemetry instruction, the integrated electronics switches to the on-demand telemetry mode, the FPGA executes the parallel processing command, and the collector starts multi-channel data acquisition. The acquisition sequence is consistent with the channel number sequence, and the address information of the high-speed acquisition channel is the address information corresponding to the channel number of the on-demand telemetry.

[0088] When the telemetry data acquisition process ends, the on-board computer will organize and encapsulate the telemetry data collected through the high-speed acquisition channel according to the specific format of the telemetry data packet. Then, these data will be stored according to their respective channel numbers and sequences. This process ensures the orderliness and traceability of the telemetry data, facilitating subsequent data retrieval and analysis.

[0089] If the real-time operating data of the electric propulsion system components exceeds the corresponding threshold range, the operating status of the components will be marked as a fault status, and the status telemetry data will be marked as 0; if the real-time operating data of each component is within the corresponding threshold range, the operating status of the electric propulsion system components will be marked as a normal status, and the status telemetry will be marked as 1.

[0090] The method provided by the present invention enables the ground control center to flexibly initiate on-demand requests and obtain relevant data according to different stages and specific requirements of the satellite electric propulsion system, thereby improving the flexibility and adaptability of operations.

[0091] The above is the basic embodiment of the present invention. The technical solution of the present invention will be further described below through a preferred embodiment.

[0092] Embodiment 1

[0093] Refer to Figure 1 and Figure 2 As shown, a on-demand telemetry method for the working state of an electric thruster includes:

[0094] Step S1: Integrate the on-demand telemetry protocol in the satellite control system to allow the ground control center to send telemetry requests;

[0095] Step S2: In the on-demand telemetry mode, the ground sends on-demand telemetry instructions to select the channel numbers of the telemetry corresponding to the electric thruster working parameters to be on-demand and classify them;

[0096] Step S3: After the FPGA analyzes the content of the on-demand telemetry instruction, it uses the communication interface to send the data to the collector.

[0097] Step S4: After the telemetry acquisition is completed, the on-board computer will packetize the telemetry acquired through the channel and store it in the on-board computer-readable memory in the order of channel numbers;

[0098] Step S5: When the ground control center needs to access the on-demand telemetry data, it will issue a specific instruction to require the on-board computer on the satellite to perform the data downlink operation. The on-board computer will retrieve the on-demand telemetry data packets collected and stored within the specified time period from the readable memory. These data packets will be reorganized into telemetry frames and sent back to the ground through the satellite's communication system;

[0099] Step S6: Establish a data processing and analysis center on the ground to receive the telemetry data from the satellite and further analyze the working state of the electric thruster and provide decision support;

[0100] Step S7: When an abnormal signal is detected, automatically increase the data transmission frequency or send more detailed diagnostic information so that the ground control center can quickly evaluate the situation and take actions.

[0101] In this embodiment, the FPGA in Step S3, as a key hardware component, is responsible for real-time analysis of the content of the received on-demand telemetry instruction. After the analysis is completed, the FPGA converts the instruction into a telemetry data acquisition request through a reliable communication interface, such as serial communication or space data link, and sends it to the telemetry data collector.

[0102] In this embodiment, the memory in step S4 may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM). It should be noted that the memory of the method described in the present invention is intended to include but not limited to these and any other suitable types of memory.

[0103] In step S5 of this embodiment, when the ground control center needs to access the on-demand telemetry data, it will issue a specific instruction, requiring the on-board computer on the satellite to perform the data downlink operation. The on-board computer will, according to the instruction, retrieve the on-demand telemetry data packets collected and stored within the specified time period from the memory, and reorganize these data packets into telemetry frames, and send them back to the ground through the communication system of the satellite.

[0104] In step S6 of this embodiment, the data processing and analysis center established on the ground is responsible for receiving the telemetry data from the satellite. The center uses advanced data processing technologies to deeply analyze the telemetry data to evaluate the working state of the electric propulsion and provide scientific support for decision-making.

[0105] In the system design of step S7 of this embodiment, an automatic monitoring mechanism for abnormal signals is also included. Once an abnormal signal is detected, the system will automatically increase the data transmission frequency or send more detailed diagnostic information. This enables the ground control center to quickly evaluate the situation and take necessary actions in a timely manner to ensure the continuity and safety of the satellite mission.

[0106] The on-demand telemetry method provided by the present invention can provide detailed working state data, which helps the ground control center to conduct in-depth analysis and quickly and accurately diagnose the faults of the electric propulsion system.

[0107] The present invention also provides an on-demand telemetry system for the working state of a satellite electric thruster. The on-demand telemetry system for the working state of the satellite electric thruster can be implemented by executing the process steps of the on-demand telemetry method for the working state of the satellite electric thruster. That is, those skilled in the art can understand the on-demand telemetry method for the working state of the satellite electric thruster as a preferred implementation manner of the on-demand telemetry system for the working state of the satellite electric thruster.

[0108] Specifically, an on-demand telemetry system for the working state of a satellite electric thruster includes:

[0109] Module M1: Integrate an on-demand telemetry protocol in the satellite control system;

[0110] The on-demand telemetry protocol enables the ground control center to request specific telemetry data;

[0111] Module M2: Enable the FPGA to parse the on-demand telemetry instructions sent from the ground and complete the acquisition, and use the on-board computer to complete packet storage;

[0112] Module M3: When the ground control center needs to access the on-demand telemetry data, enable the on-board computer to retrieve and reorganize the stored data packets into telemetry frames and send them to the ground through the satellite communication system;

[0113] Module M4: Enable the ground to receive and analyze the telemetry data. If an anomaly is detected, automatically adjust the data transmission frequency.

[0114] The module M2 includes the following sub-modules:

[0115] Module M2.1: In the on-demand telemetry mode, send on-demand telemetry instructions from the ground, select the channel numbers corresponding to the telemetry of the electric thruster working parameters to be on-demand and classify them;

[0116] Module M2.2: Enable the FPGA to parse the content of the on-demand telemetry instructions and send the data to the collector using a communication interface;

[0117] Module M2.3: After the telemetry acquisition is completed, enable the on-board computer to packetize the telemetry collected through the channels and store them in the on-board computer-readable memory in the order of channel numbers.

[0118] The module M3 includes:

[0119] When the ground control center needs to access the on-demand telemetry data, issue a specific instruction to require the on-board computer on the satellite to perform a data downlink operation; the on-board computer retrieves the on-demand telemetry data packets collected and stored within a specified time period from the readable memory; reorganize the on-demand telemetry data packets into telemetry frames and send them back to the ground through the communication system of the satellite.

[0120] The module M4 includes the following sub-modules:

[0121] Module M4.1: Establish a data processing and analysis center on the ground, receive telemetry data from satellites, and further analyze the working status of the electric thruster and provide decision support;

[0122] Module M4.2: When an abnormal signal is detected, automatically increase the data transmission frequency or send more detailed diagnostic information, enabling the ground control center to evaluate the situation and take actions.

[0123] The working parameters of the electric thruster include the working status of the thruster, fuel level, and system temperature;

[0124] The categories of telemetry information include:

[0125] - Operating status of the electric thruster system;

[0126] - Status of the uplink channel;

[0127] - Status of the downlink channel;

[0128] - Status of the electric thruster;

[0129] - Status of the pipeline system;

[0130] - Status of the safety mode;

[0131] - Status of mission execution.

[0132] If the category of the telemetry information is the operating status of the electric thruster system, the status of the uplink channel, the status of the downlink channel, or the status of mission execution, then after performing digital CRC verification according to the category of the telemetry information, the telemetry data is processed into status telemetry data;

[0133] If the category of the telemetry information is the status of the electric thruster, the status of the pipeline system, or the status of the safety mode, the generated status telemetry data is 0 or 1.

[0134] The said module M2.2 includes:

[0135] After the integrated electronics receives the on-demand telemetry instruction, it switches to the on-demand telemetry mode, the FPGA executes the parallel processing command, and the collector starts multi-channel data acquisition; the acquisition sequence is consistent with the channel number sequence, and the address information of the high-speed acquisition channel is the address information corresponding to the channel number of the on-demand telemetry.

[0136] The said module M2.3 includes:

[0137] When the telemetry data acquisition process ends, the on-board computer organizes and encapsulates the telemetry data collected through the high-speed acquisition channel according to the specific format of the telemetry data packet, and stores it based on the channel number and sequence to which it belongs.

[0138] If the real-time operation data of the electric propulsion system components exceeds the corresponding threshold range, the operation status of the components is marked as a fault status, and the status telemetry data is marked as 1; if the real-time operation data of each component is within the corresponding threshold range, the operation status of the electric propulsion system components is marked as a normal status, and the status telemetry is marked as 0.

[0139] Those skilled in the art know that in addition to implementing the system and its various devices, modules, and units provided by the present invention in the form of pure computer-readable program code, the method steps can be logically programmed to enable the system and its various devices, modules, and units provided by the present invention to be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers to achieve the same functions. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for implementing various functions can also be regarded as the structures within the hardware component; the devices, modules, and units for implementing various functions can also be regarded as either software modules for implementing the method or structures within the hardware component.

[0140] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

Claims

1. A method for on-demand telemetry of the working state of a satellite electric thruster, characterized in that, Including: Step S1: Integrate the on-demand telemetry protocol into the satellite control system; The on-demand telemetry protocol enables the ground control center to request specific telemetry data; Step S2: Enable the FPGA to parse the on-demand telemetry instructions sent from the ground and complete the acquisition, and use the on-board computer to complete packet storage; Step S3: When the ground control center needs to access the on-demand telemetry data, enable the on-board computer to retrieve and reorganize the stored data packets into telemetry frames and send them to the ground through the satellite communication system; Step S4: Enable the ground to receive and analyze the telemetry data. If an anomaly is detected, automatically adjust the data transmission frequency.

2. The on-demand telemetry method for the working state of a satellite electric thruster according to claim 1, characterized in that The said Step S2 includes the following sub-steps: Step S2.1: In the on-demand telemetry mode, the ground sends on-demand telemetry instructions, selects the channel numbers corresponding to the electric propulsion working parameters of the telemetry to be on-demand and classifies them; Step S2.2: Enable the FPGA to parse the content of the on-demand telemetry instructions and then send the data to the collector through the communication interface; Step S2.3: After the telemetry acquisition is completed, enable the on-board computer to packetize the telemetry acquired through the channels and store them in the on-board computer-readable memory in the order of channel numbers.

3. The on-demand telemetry method for the working state of a satellite electric thruster according to claim 1, characterized in that, The said Step S3 includes: When the ground control center needs to access the on-demand telemetry data, issue a specific instruction to require the on-board computer on the satellite to perform the data downlink operation; the on-board computer retrieves the on-demand telemetry data packets collected and stored within the specified time period from the readable memory; reorganize the said on-demand telemetry data packets into telemetry frames and send them back to the ground through the satellite's communication system.

4. The on-demand telemetry method for the working state of a satellite electric thruster according to claim 1, wherein The said Step S4 includes the following sub-steps: Step S4.1: Establish a data processing and analysis center on the ground, receive the telemetry data from the satellite, and further analyze the electric propulsion working status and provide decision support; Step S4.2: When an anomaly signal is detected, automatically increase the data transmission frequency or send more detailed diagnostic information to enable the ground control center to evaluate the situation and take actions.

5. The on-demand telemetry method for the satellite electric propulsion working state according to claim 2, characterized in that The electric propulsion working parameters include the thruster working status, fuel level, and system temperature; The categories of telemetry information include: - Electric propulsion system operating status; - Uplink channel status; - Downlink channel status; - Electric thruster status; - Pipeline system status; - Safe mode status; - Mission execution status.

6. The on-demand telemetry method for the satellite electric propulsion working state according to claim 5, wherein If the category of the telemetry information is: electric propulsion system operating status, uplink channel status, downlink channel status, or mission execution status, then after performing digital CRC verification according to the category of the telemetry information, process the telemetry data into status telemetry data; If the category of the telemetry information is: electric thruster status, pipeline system status, or safe mode status, the generated status telemetry data is 0 or 1.

7. The on-demand telemetry method for the satellite electric propulsion working state according to claim 5, characterized in that The said Step S2.2 includes: After the integrated electronics receives the on-demand telemetry instructions, switch to the on-demand telemetry mode, the FPGA executes parallel processing commands, and enable the collector to start multi-channel data acquisition; the acquisition sequence is consistent with the channel number sequence, and the address information of the high-speed acquisition channel is the address information corresponding to the channel number of the on-demand telemetry.

8. The on-demand telemetry method for the satellite electric propulsion working state according to claim 2, wherein The said Step S2.3 includes: When the telemetry data acquisition process ends, the on-board computer organizes and encapsulates the telemetry data collected through the high-speed acquisition channel according to the specific format of the telemetry data packet, and stores it based on the channel number and sequence to which it belongs.

9. The on-demand telemetry method for the working state of a satellite electric thruster according to claim 5, wherein If the real-time operation data of the electric propulsion system components exceeds the corresponding threshold range, the operation status of the components is marked as a fault status, and the status telemetry data is marked as 1; if the real-time operation data of each component is within the corresponding threshold range, the operation status of the electric propulsion system components is marked as a normal status, and the status telemetry is marked as 0.

10. A on-demand telemetry system for the working state of a satellite electric thruster, characterized in that, Including: Module M1: Integrate the on-demand telemetry protocol in the satellite control system; The on-demand telemetry protocol enables the ground control center to request specific telemetry data; Module M2: Enable the FPGA to parse the on-demand telemetry instructions sent from the ground and complete the acquisition, and use the on-board computer to complete packet assembly and storage; Module M3: When the ground control center needs to access the on-demand telemetry data, enable the on-board computer to retrieve and reorganize the stored data packets into telemetry frames and send them to the ground through the satellite communication system; Module M4: Enable the ground to receive and analyze the telemetry data, and if an anomaly is detected, automatically adjust the data transmission frequency.

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