Autonomous health management method for high-orbit remote sensing satellite measurement and control channel

Abstract

The invention provides a method for autonomous health management of a measurement and control channel of a high-orbit remote sensing satellite. The measurement and control channel is established through a spread spectrum responder or a multi-mode spread frequency hopping responder. The measurement and control device is arranged behind the corresponding spread spectrum responder and is used for enhancing the stability of the measurement and control channel established by the spread spectrum responder; the monitoring process comprises the following steps that: the system management unit receives telemetering from each measurement and control channel through the bus in a T0 period, and performs health treatment on each measurement and control channel through the bus at the same time. According to the method, the timeliness of in-orbit fault response of the measurement and control channel is improved, the influence of the in-orbit fault of the measurement and control channel on a user is eliminated or reduced, long-term management control of a satellite on the measurement and control channel is simplified, the complexity of autonomous disposal measures is low, and the requirement for on-satellite processing resources is low.

Description

Technical Field

[0001] The present invention relates to a method for autonomous health management of the TT&C channel of a geostationary remote sensing satellite, belonging to the field of autonomous health management of geostationary remote sensing satellites. Background Art

[0002] The geostationary space environment is harsh. Therefore, the autonomous health management system of geostationary remote sensing satellites is a key technology to ensure the long-term stable operation of satellites in orbit. The TT&C channel is an important part of the communication between the satellite and the ground control center. It is responsible for transmitting the telemetry data of the geostationary remote sensing satellite in orbit to the ground control center, enabling the ground control center to monitor the satellite status in real time. Thus, it is necessary to perform autonomous health monitoring on the TT&C channel to monitor the status of the TT&C channel in real time and ensure that anomalies are detected and processed in orbit in a timely manner.

[0003] Currently, geostationary remote sensing satellites have great development potential, and their autonomous health management methods need to be improved, especially the autonomous health management of the TT&C channel. For the autonomous health management method of the TT&C channel, the existing methods still have low timeliness in dealing with anomalies, and also require a large amount of on-board computing resources. In addition, they require long-term management and control by the remote sensing satellite itself and cannot well reduce the impact of faults on users. Summary of the Invention

[0004] The technical problem solved by the present invention is: overcoming the deficiencies of the prior art, a method for autonomous health management of the TT&C channel of a geostationary remote sensing satellite is proposed, which improves the timeliness of the on-orbit fault response of the TT&C channel, eliminates or reduces the impact of on-orbit faults of the TT&C channel on users, simplifies the long-term management and control of the satellite over the TT&C channel, and has a low complexity of autonomous disposal measures and low requirements for on-board processing resources.

[0005] The technical solution of the present invention is: a method for autonomous health monitoring of the TT&C channel of a geostationary remote sensing satellite, where the TT&C channel is established through a spread-spectrum transponder or a multi-mode spread-spectrum and frequency-hopping transponder; a TT&C solid is placed behind the corresponding spread-spectrum transponder to enhance the stability of the TT&C channel established by the spread-spectrum transponder; the monitoring process includes: the system management unit receives telemetry from each TT&C channel through the bus at a period of T0, and at the same time performs health disposal on each TT&C channel through the bus.

[0006] Performing health disposal on the TT&C channel through the bus includes:

[0007] 1) When the TT&C channel is disconnected without being disposed, the system management unit generates a major event report;

[0008] 2) Performing autonomous processing in the first TT&C channel to establish a detection criterion:

[0009] Criterion 1: The power-on state of the measurement and control solid-state amplifier N1 is off or the power-on state of the spread-spectrum transponder N1 is off;

[0010] Criterion 2: The power-on state of the measurement and control solid-state amplifier N 多模 is off or the power-on state of the multi-mode spread-spectrum and frequency-hopping transponder is off;

[0011] The system management unit determines whether the above criteria are simultaneously met. If the criteria are simultaneously met, it is considered to be established once. After being continuously established three times, proceed to step 3);

[0012] 3) Judge the power telemetry status of the measurement and control solid-state amplifier N1;

[0013] 4) When the power telemetry status of the measurement and control solid-state amplifier N1 is the power-on state, proceed to step 5); when the power telemetry status of the measurement and control solid-state amplifier N1 is the non-power-on state, the system management unit sends an instruction: turn on the measurement and control solid-state amplifier N1, and proceed to step 7);

[0014] 5) The system management unit sends an instruction: power on the spread-spectrum transponder N1;

[0015] 6) After an interval of time t1, the system management unit continues to send an instruction; turn on the spread-spectrum transponder N1;

[0016] 7) Return to step 3) to enter the autonomous handling of the next measurement and control channel;

[0017] Through the above steps 1) to 7), the abnormal condition of the disconnection of the measurement and control channel is processed to restore the connection of the space-ground measurement and control channel.

[0018] If there exists N i , i = 2, 3... n, it means that there is a hot standby measurement and control channel; at this time, add Criterion 3: the power-on state of the measurement and control solid-state amplifier N i is off or the power-on state of the spread-spectrum transponder N i is off.

[0019] The t1 ≥ 3s.

[0020] The execution time of the above steps 1) to 7) is not greater than 20s.

[0021] When the power-on state of the measurement and control solid-state amplifier N i is on, but the bus voltage is less than the set threshold U0, the measurement and control solid-state amplifier N i automatically cuts off the power for protection.

[0022] When the timer reaches the set timing threshold T0, the system management unit sends an instruction: reset the spread-spectrum transponder N i or the multi-mode spread-spectrum and frequency-hopping transponder; at the same time, clear the timer of the spread-spectrum transponder N i or the multi-mode spread-spectrum and frequency-hopping transponder and restart the timing.

[0023] It is stated that T0 ≤ 1 s.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1) The method of the present invention takes into account both the abnormal handling and normal protection of the measurement and control channels, significantly reducing the abnormal time of the measurement and control channel links;

[0026] 2) When the method of the present invention detects an abnormality in the measurement and control channel, the selected autonomous handling has low complexity and a fast fault recovery speed. Description of the Drawings

[0027] Figure 1 It is a flowchart of autonomous handling when the measurement and control channel is disconnected. Detailed Embodiment

[0028] As Figure 1 shown, a method for autonomous health management of the measurement and control channel of a geostationary remote sensing satellite according to the present invention. The space-ground measurement and control channel is established through a spread-spectrum transponder A, a spread-spectrum transponder B, and a multi-mode spread-spectrum and hopping transponder. The three measurement and control channels are hot backups of each other. The spread-spectrum transponder B is a hot backup of the spread-spectrum transponder A. The multi-mode spread-spectrum and hopping transponder has the ability to switch between multiple modes. The measurement and control fixed amplifier is used to enhance the signals of the space-ground channel. The system management unit receives the telemetry from the measurement and control channel through the bus at a period of 1 s, and simultaneously performs health handling on the measurement and control channel through the bus.

[0029] The following are the abnormal autonomous handling and normal autonomous protection of the measurement and control channel:

[0030] 1. When the measurement and control channel is not established, perform autonomous handling according to the following steps:

[0031] 1) When the measurement and control channel is disconnected without being handled, the system management unit generates a major event report;

[0032] 2) Perform autonomous processing in the first measurement and control channel to establish detection criteria:

[0033] Criterion 1: The power-on state of the measurement and control fixed amplifier N1 is off or the power-on state of the spread-spectrum transponder N1 is off;

[0034] Criterion 2: The power-on state of the measurement and control fixed amplifier N 多模 is off or the power-on state of the multi-mode spread-spectrum and hopping transponder is off;

[0035] The system management unit determines whether the above criteria are simultaneously met. If the criteria are simultaneously met, it is considered to be established once. After being continuously established three times, proceed to step 3);

[0036] 3) Judge the power telemetry state of the measurement and control fixed amplifier N1;

[0037] 4) When the telemetry status of the power supply of the measurement and control solid-state amplifier N1 is in the powered-on state, go to step 5); when the telemetry status of the power supply of the measurement and control solid-state amplifier N1 is in the unpowered state, the system management unit sends an instruction: turn on the measurement and control solid-state amplifier N1, and go to step 7);

[0038] 5) The system management unit sends an instruction: power on the spread-spectrum transponder N1;

[0039] 6) After an interval time t1, the system management unit continues to send an instruction; turn on the spread-spectrum transponder N1;

[0040] 7) Return to step 3) to enter the autonomous handling of the next measurement and control channel;

[0041] Through the above steps 1) to 7), the abnormal condition of the disconnection of the measurement and control channel is processed to restore the connection of the satellite-ground measurement and control channel.

[0042] The execution time of the above processing flow is not greater than 20 s, so as to timely handle the abnormal disconnection of the measurement and control channel and reduce the impact on the user's use caused by the disconnection of the measurement and control channel.

[0043] In order to prevent the spread-spectrum transponder from causing the failure of the measurement and control channel due to phenomena such as single-event upset and software anomaly, the protection mechanism is as follows: when the timing reaches 48 h, the system management unit sends an instruction: the reset instruction of the spread-spectrum transponder. At the same time, the timer of the spread-spectrum transponder is cleared and starts timing again.

[0044] This method performs real-time handling of abnormal states such as abnormal disconnection of the measurement and control channel, abnormal voltage of the measurement and control solid-state amplifier, and abnormal shutdown of the measurement and control solid-state amplifier through measures with low complexity and high real-time performance, thereby greatly reducing the impact of the abnormal measurement and control channel on the user's use. At the same time, the measurement and control channel is protected autonomously in a normal state, thereby effectively alleviating the impact caused by single-event and software anomalies. Through rapid autonomous handling of anomalies and normal autonomous protection, this method effectively maintains the health of the measurement and control channel of the geostationary remote sensing satellite.

[0045] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for autonomous health monitoring of the TT&C channel of a high-orbit remote sensing satellite, characterized in that, The measurement and control channel is established through a spread-spectrum transponder or a multi-mode spread-spectrum and frequency-hopping transponder; The measurement and control solid state amplifier is placed behind the corresponding spread-spectrum transponder to enhance the stability of the measurement and control channel established by the spread-spectrum transponder; The monitoring process includes: the system management unit receives the telemetry from each measurement and control channel through the bus at a period of T0, and at the same time performs health treatment on each measurement and control channel through the bus.

2. The method for autonomous health monitoring of the TT&C channel of a high-orbit remote sensing satellite according to claim 1, wherein, The health treatment of the measurement and control channel through the bus includes: 1) When the measurement and control channel is disconnected without treatment, the system management unit generates a major event report; 2) Perform autonomous processing in the first measurement and control channel to establish detection criteria: Criterion 1: The power-on state of the measurement and control solid state amplifier N1 is off or the power-on state of the spread-spectrum transponder N1 is off; Criterion 2: Measurement and Control Solid State Amplifier N 多模 The power-on state is off or the power-on state of the multi-mode spread-spectrum and frequency-hopping transponder is off; The system management unit judges whether the above criteria are satisfied at the same time. If the criteria are satisfied at the same time, it is considered to be established once. After being continuously established three times, step 3) is entered; 3) Judge the power telemetry state of the measurement and control solid state amplifier N1; 4) When the power telemetry state of the measurement and control solid state amplifier N1 is the power-on state, step 5) is entered; when the power telemetry state of the measurement and control solid state amplifier N1 is the non-power-on state, the system management unit sends an instruction: turn on the measurement and control solid state amplifier N1, and step 7) is entered; 5) The system management unit sends an instruction: power on the spread-spectrum transponder N1; 6) After an interval time t1, the system management unit continues to send an instruction; turn on the spread-spectrum transponder N1; 7) Return to step 3) to enter the autonomous treatment of the next measurement and control channel; The abnormal disconnection condition of the measurement and control channel is processed through the above steps 1) to 7), and the satellite-ground measurement and control channel connection is restored.

3. A method for autonomous health monitoring of the TT&C channel of a high-orbit remote sensing satellite according to claim 2, characterized in that If there exists N i , where i = 2, 3... n, it indicates the existence of a hot standby measurement and control channel; at this time, add criterion 3: the measurement and control solid-state amplifier N i is in the power-off state or the spread-spectrum transponder N i is in the power-off state.

4. A method for autonomous health monitoring of the TT&C channel of a high-orbit remote sensing satellite according to claim 2, characterized in that, The t1≥3s.

5. A method for autonomous health monitoring of the TT&C channel of a high-orbit remote sensing satellite according to claim 2, characterized in that, The execution time of steps 1) to 7) is not greater than 20s.

6. A method for autonomous health monitoring of the TT&C channel of a high-orbit remote sensing satellite according to claim 3, characterized in that, When the measurement and control solid-state amplifier N i is in the powered-on state and the bus voltage is less than the set threshold U0, the measurement and control solid-state amplifier N i automatically shuts down for protection.

7. A method for autonomous health monitoring of the TT&C channel of a high-orbit remote sensing satellite according to claim 1, characterized in that, When the timer reaches the set timing threshold T0, the system management unit sends an instruction: the spread spectrum transponder N i or the reset instruction for the multi-mode spread spectrum and frequency hopping transponder; simultaneously, the spread spectrum transponder N i or the multi-mode spread spectrum and frequency hopping transponder clears the timer and starts timing again.

8. A method for autonomous health monitoring of the TT&C channel of a high-orbit remote sensing satellite according to claim 1, characterized in that, The T0≤1s.

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