Measurement and control system and method for on-orbit satellite telemetry data transmission

Abstract

The invention relates to a measurement and control system and a measurement and control method for on-orbit satellite telemetry data transmission, and the system comprises a measurement and control antenna which is used for receiving an uplink measurement and control signal of a ground measurement and control station and forwarding a downlink measurement and control signal to the ground measurement and control station; the satellite service computer is used for acquiring and processing the telemetering data and the remote control data, setting different telemetering rates according to instructions, and outputting the telemetering data of the whole satellite according to the telemetering rates; the measurement and control integrated responder is used for receiving and processing the uplink measurement and control signal, generating remote control data of the uplink measurement and control signal, receiving and processing telemetry data of a whole satellite according to a telemetry rate, and generating a downlink measurement and control signal, and the downlink measurement and control data only comprises real-time telemetry data or simultaneously comprises the real-time telemetry data and delay telemetry data; a microwave network. According to the method, telemetering channel transmission of the delayed telemetering data can be realized, more important data and target data are transmitted to the measurement and control ground station under the condition of not changing the telemetering transmission rate, and the utilization rate and the availability of the telemetering data are improved.

Description

Technical Field

[0001] The present invention relates to the field of aerospace measurement and control technology, and in particular to a measurement and control system and a measurement and control method for on-orbit satellite telemetry data transmission. Background Art

[0002] During the satellite's in-orbit operation, the ground control station needs to perform routine remote control and telemetry on the satellite. However, due to the low rate of the telemetry channel and the inability of the ground receiving base station to achieve global coverage, the satellite can only transmit data to the ground station within a limited time. This results in the inability to transmit all the status information generated by the satellite during its in-orbit operation. In this case, how to optimize the downlink strategy and obtain as much important data and target data as possible is an urgent problem to be solved in the field of satellite telemetry management.

[0003] In the process of actual engineering application, in order to obtain more satellite status, two methods are usually used: 1) Using the telemetry channel, according to the preset configuration information, the satellite application status is transmitted to the ground measurement and control station at a fixed period; 2) Using the data transmission channel, the satellite application status is packaged and transmitted to the satellite data transmission subsystem for storage, and the data is transmitted to the ground data transmission station when the satellite data transmission downlink task is performed;

[0004] However, all of the above methods have their shortcomings. When only telemetry channels are used, due to the limitations of channel rate and transmission time, it is often not enough to transmit all data generated during orbital operation to the ground within the specified time. As a result, the target delay data obtained is often very small in amount and very scattered, with almost no utilization value.

[0005] When using digital transmission channels, the satellite and the ground need to perform data subpackaging and integration before and after transmission, which can easily cause data errors and losses, bringing unnecessary trouble. Summary of the invention

[0006] In order to solve the technical problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a measurement and control system and system for in-orbit satellite telemetry data transmission, which can realize the telemetry channel transmission of delayed telemetry data, and transmit more important data and target data to the measurement and control ground station without changing the telemetry transmission rate, thereby improving the utilization and availability of telemetry data.

[0007] In order to achieve the above-mentioned object of the invention, the present invention provides a measurement and control system for transmitting telemetry data of an on-orbit satellite, comprising:

[0008] The measurement and control antennas include measurement and control antenna A and measurement and control antenna B, which are used to receive uplink measurement and control signals from a ground measurement and control station and forward downlink measurement and control signals to the ground measurement and control station;

[0009] A satellite service computer, used to obtain and process telemetry data and remote control data in the uplink measurement and control signal, set different telemetry rates according to the instructions of the remote control data, and output the telemetry data of the entire satellite according to the telemetry rate;

[0010] The integrated measurement and control transponder is used to receive and process the uplink measurement and control signal, generate remote control data of the uplink measurement and control signal, and receive and process the whole-satellite telemetry data at the adaptive telemetry rate to generate the downlink measurement and control signal, wherein the downlink measurement and control data only includes real-time telemetry data, or includes real-time telemetry data and delayed telemetry data at the same time; the real-time telemetry data is the whole-satellite telemetry data generated in real time by the satellite service computer; the delayed telemetry data is the whole-satellite telemetry data played back after being stored in the fixed memory of the integrated measurement and control transponder;

[0011] A microwave network, wherein the measurement and control antenna A and the measurement and control antenna B are respectively electromechanically connected to the transponder A and the transponder B through the microwave network.

[0012] According to a technical solution of the present invention, the integrated measurement and control transponder includes an identical transponder A and transponder B, and both the transponder A and the transponder B include:

[0013] A baseband processing unit is bidirectionally connected to the satellite computer, and is used to obtain the whole satellite telemetry data from the satellite computer, and process and forward the remote control data of the uplink measurement and control signal to the satellite computer;

[0014] a receiving channel, an output end of which is electrically connected to the baseband processing unit, and an input end of which is electrically connected to the microwave network;

[0015] a transmitting channel, an input end of which is electrically connected to the baseband processing unit, and an output end of which is electrically connected to the microwave network;

[0016] A storage device, electrically connected to the baseband processing unit, and configured to store telemetry data from the baseband processing unit;

[0017] The microwave network is a six-port network, which is respectively connected to the transmitting channel, the receiving channel and the measurement and control antenna of the transponder A and the transponder B.

[0018] According to a technical solution of the present invention, the processing of the telemetry data by the satellite service computer includes:

[0019] Collection, quantification, encoding, packaging, framing, verification and scrambling of telemetry data;

[0020] The processing of the remote control data by the satellite service computer includes:

[0021] PCM code stream reception, frame synchronization, descrambling, frame identification, frame extraction, verification or injected data output for remote control indirect commands and injected data.

[0022] According to a technical solution of the present invention, the processing of the uplink measurement and control signal by the integrated measurement and control transponder includes:

[0023] Demodulate and decode the uplink measurement and control signal to obtain remote control data; verify the obtained remote control data; execute instructions on the remote control data or descramble the injected data, then verify and output it to the satellite service computer;

[0024] The processing of the whole-satellite telemetry data by the integrated measurement and control transponder includes channel coding and modulating the whole-satellite telemetry data to generate the downlink measurement and control signal, and storing the whole-satellite telemetry data.

[0025] According to one solution of the present invention, a measurement and control method based on the measurement and control system for transmitting telemetry data of the above-mentioned on-orbit satellite is provided, which specifically includes:

[0026] Step S1, the satellite service computer sets its telemetry rate to the first output rate or the second output rate according to the output rate identifier, and performs real-time telemetry data transmission;

[0027] Step S2, the integrated measurement and control transponder receives the real-time telemetry data according to the telemetry rate;

[0028] Step S3, the integrated measurement and control transponder determines whether its recording mode is the recording mode, if so, records the real-time telemetry data and executes step S4, otherwise, directly executes step S4;

[0029] Step S4, the integrated measurement and control transponder determines whether the receiving rate of the integrated measurement and control transponder is the first output rate, if so, execute step S5, otherwise, execute step S6;

[0030] Step S5, the integrated measurement and control transponder generates a downlink measurement and control signal containing only real-time telemetry data, and outputs it at a first output rate;

[0031] Step S6: The integrated measurement and control transponder generates a downlink measurement and control signal including real-time telemetry data and delayed telemetry data, and outputs it at a first output rate.

[0032] According to a technical solution of the present invention, before step S1, the method further includes:

[0033] The satellite service computer sets its output rate identifier according to the remote control data; the integrated measurement and control transponder sets its recording mode and playback mode according to the remote control data.

[0034] According to a technical solution of the present invention, in step S6, it specifically includes:

[0035] Step S61, the integrated measurement and control transponder determines its playback mode, if yes, executes step S62, otherwise executes step S63;

[0036] Step S62: the integrated measurement and control transponder generates an empty frame, generates a downlink measurement and control signal together with the real-time telemetry data, and outputs it at a first output rate;

[0037] Step S63, the integrated measurement and control transponder determines whether the stored playback pointer address exceeds the record pointer address, if so, executes step S62, otherwise, executes step S64;

[0038] Step S64: the integrated measurement and control transponder generates delayed telemetry data, forms a downlink measurement and control signal with the real-time telemetry data, and outputs it at a first output rate.

[0039] According to a technical solution of the present invention, the first output rate is greater than the second output rate, and the first output rate and the second output rate are both integer multiples of telemetry data frames.

[0040] According to a technical solution of the present invention, the telemetry data frame is 512B, the first rate is set to 16384bps; and the second rate is set to 4096bps.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The present invention proposes a measurement and control system and a measurement and control method for telemetry data transmission of an on-orbit satellite, comprising a measurement and control integrated transponder, a microwave network, a measurement and control antenna A, a measurement and control antenna B and a satellite service computer. The whole-satellite telemetry data from the satellite service computer is recorded by the storage of the integrated measurement and control transponder, so that real-time telemetry and playback delayed telemetry can be realized, thereby expanding the data volume of target delayed data and improving the data value of delayed telemetry data.

[0043] In the present invention, by judging the output rate of the satellite service computer, it is determined whether the integrated measurement and control transponder performs real-time telemetry or playback delayed telemetry, so that the telemetry channel transmission of delayed telemetry data can be realized. Without changing the telemetry transmission rate, more important data and target data can be transmitted to the measurement and control ground station within a specified limited time, thereby improving the utilization and availability of telemetry data. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 A schematic diagram schematically shows the structure of a measurement and control system for transmitting telemetry data of an on-orbit satellite provided in one embodiment of the present invention;

[0046] Figure 2 A flowchart schematically showing a method for measuring and controlling the transmission of telemetry data of an on-orbit satellite provided in accordance with an embodiment of the present invention;

[0047] Figure 3 The actual execution flow chart of the measurement and control method for on-orbit satellite telemetry data transmission provided in one embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0048] The description of the embodiments of this specification should be combined with the corresponding drawings, which should be considered as part of the complete specification. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated for simplification or convenience. Furthermore, the parts of each structure in the drawings will be described separately. It is worth noting that the elements not shown in the drawings or not described in words are in a form known to ordinary technicians in the relevant technical field.

[0049] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The following description of the preferred embodiments may involve combinations of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0050] like Figure 1 As shown, the present invention provides a measurement and control system for on-orbit satellite telemetry data transmission, comprising:

[0051] Tracking and control antenna A and tracking and control antenna B are used to receive uplink tracking and control signals from the ground tracking and control station and forward downlink tracking and control signals to the ground tracking and control station; tracking and control antenna A and tracking and control antenna B are respectively the sky tracking and control antenna and the ground tracking and control antenna;

[0052] Satellite computer 1, used to obtain and process the remote control data of the uplink measurement and control signal, set different telemetry rates according to the instructions, and output the telemetry data of the whole satellite according to the telemetry rate;

[0053] The integrated measurement and control transponder 2 is used to receive and process uplink measurement and control signals, generate remote control data of uplink measurement and control signals, and receive and process whole-satellite telemetry data at an adaptive telemetry rate to generate downlink measurement and control signals. The downlink measurement and control data only includes real-time telemetry data, or includes real-time telemetry data and delayed telemetry data at the same time. The real-time telemetry data is the whole-satellite telemetry data generated in real time by the satellite computer. The delayed telemetry data is the whole-satellite telemetry data played back after being stored in the fixed memory of the integrated measurement and control transponder.

[0054] Microwave network 3, measurement and control antenna A and measurement and control antenna B are respectively electromechanically connected to transponder A and transponder B through the microwave network.

[0055] The integrated measurement and control transponder 2 includes an identical transponder A and a transponder B. The integrated measurement and control transponder 2 includes:

[0056] The baseband processing unit A and the baseband processing unit B are bidirectionally connected to the satellite computer 1, and are used to obtain the whole satellite telemetry data from the satellite computer 1, and process and forward the remote control data of the uplink measurement and control signal to the satellite computer 1;

[0057] Receiving channel A and receiving channel B, whose output ends are electrically connected to baseband processing unit A and baseband processing unit B respectively, and whose input ends are electrically connected to microwave network 3;

[0058] Transmitting channel A and transmitting channel B, whose input ends are electrically connected to baseband processing unit A and baseband processing unit B respectively, and whose output ends are electrically connected to microwave network 3;

[0059] The storage A and the storage B are electrically connected to the baseband processing unit A and the baseband processing unit B, respectively, and are used to store telemetry data from the baseband processing unit A and the baseband processing unit B, respectively;

[0060] The microwave network 3 is a six-port network, which is respectively connected to the transmitting channel, receiving channel and measurement and control antenna of transponder A and transponder B.

[0061] In the present invention, the processing of telemetry data by the satellite service computer 1 includes:

[0062] Collection, quantification, encoding, packaging, framing, verification and scrambling of telemetry data;

[0063] The processing of remote control data by the satellite service computer 1 includes:

[0064] PCM code stream reception, frame synchronization, descrambling, frame identification, frame extraction, verification or injected data output for remote control indirect commands and injected data.

[0065] In the present invention, the processing of the uplink measurement and control signal by the integrated measurement and control transponder 2 includes:

[0066] Demodulate and decode the uplink measurement and control signal to obtain remote control data; verify the obtained remote control data; execute instructions on the remote control data or inject data into it for inspection after descrambling and output it to the satellite service computer 1; the remote control data includes the satellite service output rate setting instruction, the transponder recording mode setting instruction, and the transponder playback mode setting instruction.

[0067] The processing of the whole satellite telemetry data by the integrated measurement and control transponder 2 includes channel coding and modulation of the whole satellite telemetry data to generate downlink measurement and control signals and store the whole satellite telemetry data.

[0068] like Figure 2 and 3 As shown, the present invention provides a measurement and control method of the measurement and control system based on the above-mentioned on-orbit satellite telemetry data transmission, which specifically includes:

[0069] Step S1, the satellite service computer 1 sets its telemetry rate to the first output rate or the second output rate according to the output rate identifier, and performs real-time telemetry data transmission;

[0070] Before step S1, the method also includes: the satellite service computer sets its output rate identifier according to the remote control data; and the integrated measurement and control transponder sets its recording mode and playback mode according to the remote control data.

[0071] The first output rate is greater than the second output rate, and both the first output rate and the second output rate are integer multiples of the telemetry data frame.

[0072] like Figure 3 As shown, in one embodiment of the present invention, it is taken as an example that the satellite computer can output two transmission rates of 4096bps and 16384bps, and the downlink rate of the integrated measurement and control transponder 2 is 16384bps.

[0073] Telemetry uses 512 bytes as one frame. Different telemetry output rates correspond to different numbers of telemetry frames transmitted in 1s, that is, 4096bps corresponds to 1 frame transmitted in 1s, and 16384bps corresponds to 4 frames transmitted in 1s.

[0074] The satellite computer 1 sets its output rate identifier according to the satellite output rate setting instruction in the remote control data. The satellite computer 1 starts working and judges its output rate identifier. If it is 4096bps, it transmits telemetry at 4096bps, if not, it transmits telemetry at 16384bps.

[0075] Step S2, the integrated measurement and control transponder receives real-time telemetry data according to the telemetry rate;

[0076] The integrated measurement and control transponder 2 adapts the telemetry rate of the satellite service computer 1 and receives real-time telemetry.

[0077] Step S3, the integrated measurement and control transponder determines whether its recording mode is the recording mode, if so, records the real-time telemetry data and executes step S4, otherwise, directly executes step S4;

[0078] The integrated measurement and control transponder sets its recording mode identifier and playback identifier according to the transponder recording mode setting instruction and the transponder playback mode setting instruction in the remote control data.

[0079] The integrated measurement and control transponder 2 determines its recording mode identifier. If yes, it stores and records the telemetry data and then proceeds to step S4. Otherwise, it directly executes step S4.

[0080] Step S4, the integrated measurement and control transponder determines whether the receiving rate of the integrated measurement and control transponder is the first output rate, if so, execute step S5, otherwise, execute step S6;

[0081] The integrated measurement and control transponder 2 determines whether its receiving rate is 16384 bps. If so, execute step S5; otherwise, execute step S6.

[0082] Step S5, the integrated measurement and control transponder generates a downlink measurement and control signal containing only the real-time telemetry data, and outputs it at a first output rate;

[0083] The integrated measurement and control transponder 2 transmits telemetry data at a rate of 16384bps, of which 4 frames are real-time telemetry data.

[0084] Step S6, the integrated measurement and control transponder generates a downlink measurement and control signal including real-time telemetry data and delayed telemetry data, and outputs it at a first output rate;

[0085] In step S6, it specifically includes:

[0086] Step S61: the integrated measurement and control transponder determines the playback mode, if yes, executes step S62, otherwise executes step S63;

[0087] The integrated measurement and control transponder 2 determines its playback flag, and if so, proceeds to step S62, otherwise, proceeds to step S63.

[0088] Step S62: the integrated measurement and control transponder generates an empty frame, generates a downlink measurement and control signal together with the real-time telemetry data, and outputs it at a first output rate;

[0089] The integrated measurement and control transponder 2 transmits telemetry at a rate of 16384bps, of which 1 frame is real-time telemetry data and 3 frames are empty frames;

[0090] Step S63: the integrated measurement and control transponder determines whether the stored playback pointer address exceeds the recording pointer address. If so, execute step S62; otherwise, execute step S64.

[0091] The remote control data of the uplink measurement and control signal includes a stored playback pointer address, and the measurement and control integrated transponder plays back the corresponding data according to the stored playback pointer address. The measurement and control integrated transponder 2 determines whether its stored playback pointer address exceeds the record pointer address. If so, execute step S62, otherwise, execute step S64;

[0092] Step S64: The integrated measurement and control transponder generates delayed telemetry data, forms a downlink measurement and control signal with the real-time telemetry data, and outputs it at a first output rate.

[0093] The integrated measurement and control transponder 2 transmits telemetry at a rate of 16384bps, of which 1 frame is real-time telemetry data and 3 frames are delayed telemetry data.

[0094] It should be noted that the above is a preferred embodiment of the present invention. It should be pointed out that although the preferred embodiment of the present invention has been described, once the basic creative concept of the present invention is known, a number of improvements and modifications can be made by a person skilled in the art without departing from the principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. Therefore, the attached claims are intended to be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the embodiments of the present invention.

Claims

1. A measurement and control system for transmitting telemetry data of an on-orbit satellite, characterized in that: include: The measurement and control antennas include measurement and control antenna A and measurement and control antenna B, which are used to receive uplink measurement and control signals from a ground measurement and control station and forward downlink measurement and control signals to the ground measurement and control station; A satellite service computer, used to obtain and process telemetry data and remote control data in the uplink measurement and control signal, set different telemetry rates according to the instructions of the remote control data, and output the telemetry data of the entire satellite according to the telemetry rate; The integrated measurement and control transponder is used to receive and process the uplink measurement and control signal to generate the remote control data, and receive and process the whole-satellite telemetry data according to the telemetry rate to generate the downlink measurement and control signal, wherein the downlink measurement and control signal only contains real-time telemetry data, or contains real-time telemetry data and delayed telemetry data at the same time; the real-time telemetry data is the whole-satellite telemetry data generated in real time by the satellite service computer; the delayed telemetry data is the whole-satellite telemetry data played back after being stored in the fixed memory of the integrated measurement and control transponder; A microwave network, wherein the measurement and control antenna A and the measurement and control antenna B are respectively electromechanically connected to the transponder A and the transponder B through the microwave network.

2. The measurement and control system for on-orbit satellite telemetry data transmission according to claim 1, characterized in that: The integrated measurement and control transponder comprises an identical transponder A and transponder B, wherein both the transponder A and the transponder B comprise: A baseband processing unit is bidirectionally connected to the satellite computer, and is used to obtain the whole satellite telemetry data from the satellite computer, and process and forward the remote control data of the uplink measurement and control signal to the satellite computer; a receiving channel, an output end of which is electrically connected to the baseband processing unit, and an input end of which is electrically connected to the microwave network; a transmitting channel, an input end of which is electrically connected to the baseband processing unit, and an output end of which is electrically connected to the microwave network; A storage device, electrically connected to the baseband processing unit, and configured to store telemetry data from the baseband processing unit; The microwave network is a six-port network, which is respectively connected to the transmitting channel, the receiving channel and the measurement and control antenna of the transponder A and the transponder B.

3. The measurement and control system for on-orbit satellite telemetry data transmission according to claim 1, characterized in that: The processing of the telemetry data by the satellite service computer includes: Collection, quantification, encoding, packaging, framing, verification and scrambling of telemetry data; The processing of the remote control data by the satellite service computer includes: PCM code stream reception, frame synchronization, descrambling, frame identification, frame extraction, verification or injected data output for remote control indirect commands and injected data.

4. The measurement and control system for on-orbit satellite telemetry data transmission according to claim 1, characterized in that: The processing of the uplink measurement and control signal by the integrated measurement and control transponder includes: Demodulate and decode the uplink measurement and control signal to obtain remote control data; verify the obtained remote control data; execute instructions on the remote control data or descramble the injected data, then verify and output it to the satellite service computer; The processing of the whole-satellite telemetry data by the integrated measurement and control transponder includes channel coding and modulating the whole-satellite telemetry data to generate the downlink measurement and control signal, and storing the whole-satellite telemetry data.

5. A measurement and control method for a measurement and control system for transmitting telemetry data of an on-orbit satellite according to any one of claims 1 to 4, characterized in that: Specifically include: Step S1, the satellite service computer sets its telemetry rate to the first output rate or the second output rate according to the output rate identifier, and performs real-time telemetry data transmission; Step S2, the integrated measurement and control transponder receives the real-time telemetry data according to the telemetry rate; Step S3, the integrated measurement and control transponder determines whether its recording mode is the recording mode, if so, records the real-time telemetry data and executes step S4, otherwise, directly executes step S4; Step S4, the integrated measurement and control transponder determines whether the receiving rate of the integrated measurement and control transponder is the first output rate, if so, execute step S5, otherwise, execute step S6; Step S5, the integrated measurement and control transponder generates a downlink measurement and control signal containing only real-time telemetry data, and outputs it at a first output rate; Step S6: The integrated measurement and control transponder generates a downlink measurement and control signal including real-time telemetry data and delayed telemetry data, and outputs it at a first output rate.

6. The method according to claim 5, characterized in that Before step S1, the method further includes: The satellite service computer sets its output rate identifier according to the remote control data; the integrated measurement and control transponder sets its recording mode and playback mode according to the remote control data.

7. The method according to claim 5, characterized in that In the step S6, it specifically includes: Step S61, the integrated measurement and control transponder determines its playback mode, if yes, executes step S62, otherwise executes step S63; Step S62: the integrated measurement and control transponder generates an empty frame, generates a downlink measurement and control signal together with the real-time telemetry data, and outputs it at a first output rate; Step S63, the integrated measurement and control transponder determines whether the stored playback pointer address exceeds the record pointer address, if so, executes step S62, otherwise, executes step S64; Step S64: the integrated measurement and control transponder generates delayed telemetry data, forms a downlink measurement and control signal with the real-time telemetry data, and outputs it at a first output rate.

8. The method according to claim 5, characterized in that The first output rate is greater than the second output rate, and both the first output rate and the second output rate are integer multiples of telemetry data frames.

9. The method according to claim 8, characterized in that The telemetry data frame is 512B, the first rate is set to 16384bps; the second rate is set to 4096bps.

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