Inter-satellite laser communication rapid capturing method

Abstract

The invention provides an inter-satellite laser communication rapid capturing method, and relates to the technical field of laser communication, and the method comprises the steps: determining the estimation space orientation of a satellite antenna based on the satellite parameters of a target satellite, and carrying out the scanning according to a target scanning strategy, and obtaining a scanning light spot result; performing pointing correction based on the light spot scanning result, and establishing a target communication link; and monitoring the data communication process of the target satellite based on the target communication link in real time, and performing corresponding adjustment when communication danger exists. Determining an estimated space direction of a satellite antenna based on satellite parameters of a target satellite; performing pointing correction based on a light spot scanning result and then establishing a communication link; the communication process of the satellites based on the communication link is monitored in real time, and a response is made when the communication process is found to be abnormal, so that the communication stability and reliability between the satellites are effectively enhanced.

Description

Technical Field

[0001] The present invention relates to the field of laser communication technology, and in particular to a method for rapid capture of inter-satellite laser communication. Background Art

[0002] In recent years, intersatellite laser communication, as an important means of future space communication, has the advantages of large transmission capacity, strong anti-interference ability, and good confidentiality. However, due to the complexity of the space environment and the particularity of laser communication, the capture process of intersatellite laser communication systems faces many challenges. Traditional capture methods are difficult to meet the stability requirements of modern high-speed laser communications. Therefore, how to improve the stability and reliability of communication between satellites has become one of the current research focuses. Therefore, the present invention provides a method for rapid acquisition of inter-satellite laser communication. Summary of the invention

[0003] The present invention provides a rapid capture method for inter-satellite laser communication, which is used to determine the estimated spatial pointing of a satellite antenna based on satellite parameters of a target satellite; establish a communication link after pointing correction based on a scanning light spot result; monitor the communication process of the satellite based on the communication link in real time, and respond when an abnormality is found in the communication process, thereby effectively enhancing the stability and reliability of communication between satellites.

[0004] The present invention provides a method for rapid acquisition of inter-satellite laser communication, comprising: Step 1: Determine the estimated spatial orientation of the satellite antenna based on the satellite parameters of the target satellite, and scan the scanning area according to the target scanning strategy to obtain the scanning spot result; Step 2: performing pointing correction based on the scanning spot result and establishing a target communication link; Step 3: Monitor the data communication process of the target satellite based on the target communication link in real time, and make corresponding adjustments when there is a communication hazard.

[0005] Preferably, the estimated spatial orientation of the satellite antenna is determined based on the satellite parameters of the target satellite, and the scanning area is scanned according to the target scanning strategy to obtain the scanning spot result, including: Obtain the first satellite parameter of the target satellite at the current moment; Adjusting and analyzing the undetermined satellite pointing vector obtained by analyzing the first satellite parameter to obtain an estimated space pointing; Set the scanning strategy according to the current application requirements to obtain the target scanning strategy; Based on the target scanning strategy and the estimated spatial orientation, a scanning tool is started to scan the scanning area to obtain a scanning spot result.

[0006] Preferably, the scanning strategy is set according to the current application requirements to obtain the target scanning strategy, including: Taking the current application scenario and the target satellite category as screening conditions, extracting the first inter-satellite communication record data from the inter-satellite communication database; If the first intersatellite communication record data does not exist, extracting a corresponding matching preset scanning strategy from the setting strategy table as a pending scanning strategy according to the current application scenario and the target satellite category; If the first inter-satellite communication record data exists, taking the first communication requirement category in the current application requirement as a screening condition, extracting the second inter-satellite communication record data from the first inter-satellite communication record data; If the second intersatellite communication record data does not exist, extracting a corresponding matching preset scanning strategy from the setting strategy table as the pending scanning strategy according to the current application scenario and the target satellite category; If the second intersatellite communication record data exists, extracting the historical scanning strategy from the second intersatellite communication record data; When there is only a single historical scanning strategy, the historical scanning strategy is regarded as a pending scanning strategy; When there are multiple historical scanning strategies, the strategy matching degree is calculated for each current historical scanning strategy; The historical scanning strategy with the largest strategy matching degree is regarded as the pending scanning strategy; Determine the target scanning range based on the position of the target satellite and the estimated spatial orientation; Based on the target scanning range, determining a scanning start angle and an end angle; By analyzing the data transmission volume of the pending scanning strategy in the historical scanning cycle, the scanning frequency in the pending scanning strategy is optimized to obtain the target scanning frequency; The calculation formula of the target scanning frequency is as follows: ; In the formula, It is expressed as the target scanning frequency; It is represented as the scanning frequency in the pending scanning strategy; The corresponding historical scanning period is represented as the maximum data transmission amount transmitted using the pending scanning strategy; It is expressed as the maximum amount of data transmitted using the pending scanning strategy; It is expressed as the current expected data transfer volume; The target scanning range, the scanning start angle and the end angle, and the target scanning frequency are used to adjust the undetermined scanning strategy to obtain a target scanning strategy.

[0007] Preferably, the calculation formula of the strategy matching degree is as follows: ; In the formula, It is expressed as the strategy matching degree of the s-th historical scanning strategy; It is expressed as the scanning success rate of the s-th historical scanning strategy; It is represented as the frequency of occurrence of the current s-th historical scanning strategy; It is represented as the maximum value of the hth first communication demand index in all the second inter-satellite communication record data corresponding to the sth historical scanning strategy; It is represented as the index requirement value of the current h-th first communication requirement; It is represented as the minimum value of the hth first communication demand indicator in all the second inter-satellite communication record data corresponding to the sth historical scanning strategy; It is expressed as the influence weight of the hth first communication demand on the matching degree of the analysis strategy.

[0008] Preferably, adjusting and analyzing the undetermined satellite pointing vector obtained by analyzing the first satellite parameter to obtain an estimated space pointing includes: Acquire the three-dimensional position coordinates of the target satellite according to the first orbital parameter in the first satellite parameter; After converting the three-dimensional position coordinates of the target satellite into a coordinate system equivalent to the target satellite body, the coordinates are combined with the attitude parameters in the first satellite parameters to calculate and obtain the first satellite pointing; Obtaining and obtaining a pending satellite pointing vector of the target antenna equivalent to the target satellite body according to the installation angle of the target antenna equivalent to the target satellite body and combining the first satellite pointing; The pointing vector of the satellite to be determined is converted from the satellite body coordinate system to the inertial coordinate system; Acquiring a first sensitive parameter in the process of collecting real-time motion data of a target satellite; Inputting the first sensitive parameter after data preprocessing into a pre-established pointing error prediction model to obtain a first error amount; Using the first error quantity to adjust the pointing vector of the pending satellite to obtain the target pointing vector; The target pointing vector is converted into a geographic coordinate system to obtain an estimated spatial pointing.

[0009] Preferably, performing pointing correction based on the scanning spot result and establishing a target communication link includes: When the target photoelectric sensor preset on the target satellite detects the scanning spot result, it immediately triggers the capture signal; The closed-loop control system receives the capture signal and obtains the light spot position information based on the scanning light spot result; Acquire a first deviation between a target pointing vector and a vector of an ideal incident direction of the laser based on the light spot position information, and generate a direction adjustment signal accordingly; The current target satellite receives and responds to the direction adjustment signal, controls the corresponding mechanical structure to adjust the current estimated space direction to the ideal incident direction of the laser, and immediately triggers the pointing correction signal; After receiving the pointing correction signal, the laser communication module immediately establishes a laser communication link and outputs it as a target communication link.

[0010] Preferably, real-time monitoring of the data communication process of the target satellite based on the target communication link and making corresponding adjustments when there is a communication hazard include: Using a set acquisition tool to collect in real time the process of data transmission by the current target satellite based on the target communication link to obtain first transmission status data; Preprocessing the first transmission status data to obtain second transmission status data; Obtaining a first light spot offset and a first signal strength change according to the direction change data in the second transmission status data; If the first light spot offset or the first signal intensity change exceeds the corresponding set change threshold, it is determined that the current direction needs to be adjusted; Inputting the first light spot offset and the first signal intensity change into a pre-established pointing adjustment estimation model to obtain a required pointing adjustment amount; Converting the required orientation adjustment amount into a first orientation adjustment instruction, and controlling a corresponding mechanical structure to adjust the orientation of the current estimated space; A communication risk analysis is performed on the communication change data in the second transmission status data, and if it is determined that the current communication is dangerous, timely repair is performed.

[0011] Preferably, performing communication risk analysis on the communication change data in the second transmission status data, and if it is determined that the current communication is dangerous, performing timely repairs, including: Compare the communication change data with a set communication change threshold, and mark the communication change data greater than the set communication change threshold as abnormal data; Marking the communication change data which is less than the set communication change threshold and whose first data difference with the set communication change threshold is not less than the set data difference as possible abnormal data; Marking the communication change data which is smaller than the set communication change threshold and whose first data difference with the set communication change threshold is smaller than the set data difference as normal data; According to the marking status of the current communication change data, the communication risk factor of the current target satellite is determined; The calculation formula of the communication risk coefficient is as follows: ;W represents the current communication risk factor; It is expressed as the total amount of communication change data; It is expressed as the amount of possible abnormal data; It is expressed as the absolute difference between the i-th possible abnormal data and the data corresponding to the set communication change threshold; It is expressed as the impact weight of the i-th possible abnormal data on data communication; It is expressed as the amount of abnormal data; It is expressed as the absolute difference between the jth abnormal data and the data corresponding to the set communication change threshold; It is expressed as the impact weight of the j-th abnormal data on data communication; Determine the communication risk level of the current target satellite according to the acquired communication risk coefficient; Taking the communication danger level as a matching condition, obtaining the first possible fault cause from the set level-fault mapping table; Extracting a first detection scheme corresponding to the first possible fault cause for immediate detection to generate a first detection result; Determine the cause of the target fault according to the first detection result; Using the target fault cause as the matching condition, the corresponding repair plan is matched from the set fault-repair plan table for timely repair.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: The estimated spatial pointing of the satellite antenna is determined based on the satellite parameters of the target satellite; a communication link is established after pointing correction based on the scanning spot results; the communication process of the satellite based on the communication link is monitored in real time, and an abnormality is responded to when the communication process is found, effectively enhancing the stability and reliability of communication between satellites.

[0013] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0014] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 The present invention is a flowchart of a method for rapid acquisition of inter-satellite laser communications according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0017] The embodiment of the present invention provides a method for rapid acquisition of inter-satellite laser communication. Figure 1 As shown, including: Step 1: Determine the estimated spatial orientation of the satellite antenna based on the satellite parameters of the target satellite, and scan the scanning area according to the target scanning strategy to obtain the scanning spot result; Step 2: performing pointing correction based on the scanning spot result and establishing a target communication link; Step 3: Monitor the data communication process of the target satellite based on the target communication link in real time, and make corresponding adjustments when there is a communication hazard.

[0018] In this embodiment, the target satellite refers to a satellite that currently needs to establish communication with another satellite; the target scanning strategy is composed of setting a scanning tool, a scanning speed, a scanning range, a scanning frequency, a scanning step size, and a scanning path, wherein the set scanning tool includes a high-speed reflection galvanometer, a piezoelectric ceramic deflection mirror, etc.; the scanning spot result refers to the actual scanning result obtained by scanning according to the target scanning strategy using the set scanning tool, wherein the scanning spot result includes the spot position information, shape and size, intensity distribution, signal quality, and timestamp, etc. The target scanning strategy is obtained by setting the scanning strategy according to the current application requirements, and the application requirements include application scenarios, communication requirements, etc.; the scanning area refers to the scanning range in the target scanning strategy; the target communication link refers to the laser communication link used to transmit data between satellites.

[0019] The beneficial effects of the above technical solution are: determining the estimated spatial pointing of the satellite antenna based on the satellite parameters of the target satellite; establishing a communication link after pointing correction based on the scanning spot results; real-time monitoring of the satellite's communication process based on the communication link, and responding when an abnormality is found in the communication process, which effectively enhances the stability and reliability of communication between satellites.

[0020] The embodiment of the present invention provides a fast acquisition method for inter-satellite laser communication, which determines the estimated spatial orientation of a satellite antenna based on satellite parameters of a target satellite, and scans a scanning area according to a target scanning strategy to obtain a scanning spot result, including: Obtain the first satellite parameter of the target satellite at the current moment; Adjusting and analyzing the undetermined satellite pointing vector obtained by analyzing the first satellite parameter to obtain an estimated space pointing; Set the scanning strategy according to the current application requirements to obtain the target scanning strategy; Based on the target scanning strategy and the estimated spatial orientation, a scanning tool is started to scan the scanning area to obtain a scanning spot result.

[0021] In this embodiment, the target satellite refers to a satellite that currently needs to establish communication with another satellite; the first satellite parameters include orbital parameters and attitude parameters, wherein the orbital parameters include semi-major axis, eccentricity, inclination, etc.; the attitude parameters include pitch angle, yaw angle, roll angle, etc.; the pending satellite pointing vector refers to the pointing vector of the target antenna equivalent to the corresponding target satellite body, wherein the target antenna refers to the antenna on the target satellite; the target pointing vector is obtained after adjusting the pending satellite pointing vector; the estimated spatial pointing is the spatial pointing of the target antenna relative to the earth obtained by converting the target pointing vector into a geographic coordinate system. The current application requirements are composed of application scenarios, communication requirements, etc., wherein the application scenarios include satellite laser communication, remote data transmission, satellite data monitoring, etc.; communication requirements include communication distance, communication environment, satellite orbit, etc.

[0022] In this embodiment, the target scanning strategy is composed of a set scanning tool, a scanning speed, a scanning range, a scanning frequency, a scanning step size, and a scanning path; the scanning area refers to the scanning range in the target scanning strategy; the scanning spot result refers to the actual scanning result obtained by scanning according to the target scanning strategy using the set scanning tool, wherein the scanning spot result includes spot position information, shape and size, intensity distribution, signal quality, and timestamp, etc.

[0023] The beneficial effect of the above technical solution is: by acquiring satellite parameters, adjusting the pointing vector, and then extracting the appropriate scanning strategy for spot capture, the accuracy and efficiency of satellite scanning are effectively improved, and the operating cost and time cost are reduced.

[0024] The embodiment of the present invention provides a method for rapid acquisition of intersatellite laser communication, wherein a scanning strategy is set according to current application requirements to obtain a target scanning strategy, including: Taking the current application scenario and the target satellite category as screening conditions, extracting the first inter-satellite communication record data from the inter-satellite communication database; If the first intersatellite communication record data does not exist, extracting a corresponding matching preset scanning strategy from the setting strategy table as a pending scanning strategy according to the current application scenario and the target satellite category; If the first inter-satellite communication record data exists, taking the first communication requirement category in the current application requirement as a screening condition, extracting the second inter-satellite communication record data from the first inter-satellite communication record data; If the second intersatellite communication record data does not exist, extracting a corresponding matching preset scanning strategy from the setting strategy table as the pending scanning strategy according to the current application scenario and the target satellite category; If the second intersatellite communication record data exists, extracting the historical scanning strategy from the second intersatellite communication record data; When there is only a single historical scanning strategy, the historical scanning strategy is regarded as a pending scanning strategy; When there are multiple historical scanning strategies, the strategy matching degree is calculated for each current historical scanning strategy; The historical scanning strategy with the largest strategy matching degree is regarded as the pending scanning strategy; Determine the target scanning range based on the position of the target satellite and the estimated spatial orientation; Based on the target scanning range, determining a scanning start angle and an end angle; By analyzing the data transmission volume of the pending scanning strategy in the historical scanning cycle, the scanning frequency in the pending scanning strategy is optimized to obtain the target scanning frequency; The calculation formula of the target scanning frequency is as follows: ; In the formula, It is expressed as the target scanning frequency; It is represented as the scanning frequency in the pending scanning strategy; The corresponding historical scanning period is represented as the maximum data transmission amount transmitted using the pending scanning strategy; It is expressed as the maximum amount of data transmitted using the pending scanning strategy; It is expressed as the current expected data transfer volume; The target scanning range, the scanning start angle and the end angle, and the target scanning frequency are used to adjust the undetermined scanning strategy to obtain a target scanning strategy.

[0025] In this embodiment, the current application scenario refers to intersatellite laser communication; the target satellite category refers to the specific type to which the current target satellite belongs, such as a fixed communication satellite, a mobile communication satellite, a data relay satellite, etc.; the target satellite refers to a satellite that currently needs to establish communication with another satellite; the intersatellite communication database is composed of historical laser communication record data between satellites, wherein the historical laser communication record data includes communication satellite category, historical application scenario, historical scanning strategy, historical laser communication duration, historical communication demand category, historical communication demand index and historical laser communication content, etc.; the first intersatellite communication record data refers to historical laser communication record data whose historical application scenario and communication satellite category are respectively the same as the current application scenario and target satellite category; the setting strategy table is composed of application scenarios, communication satellite categories and corresponding matching preset scanning strategies, wherein the preset scanning strategy is a scanning strategy set by pre-simulating the communication process of different categories of communication satellites under different application scenarios; the first communication demand includes communication distance, communication environment and satellite orbit, wherein the communication distance category includes long distance and short distance; the satellite orbit category includes geostationary orbit, medium earth orbit and low earth orbit; the communication environment category includes clear atmosphere and atmospheric interference.

[0026] In this embodiment, the second intersatellite communication record data refers to the first intersatellite communication record data whose historical communication demand category is consistent with the current first communication demand category; the strategy matching degree is used to characterize the degree of adaptation of the current historical scanning strategy and the current target satellite laser communication; the estimated spatial pointing is the spatial pointing of the target antenna relative to the earth obtained by converting the target pointing vector into the geographic coordinate system, wherein the target pointing vector is obtained after adjusting the pending satellite pointing vector, the pending satellite pointing vector refers to the pointing vector of the target antenna equivalent to the corresponding target satellite body, and the target antenna refers to the antenna on the target satellite; the position of the target satellite refers to the position vector of the target satellite and another target satellite communicating, which is calculated by combining the orbital parameters and attitude parameters of the satellite; the target scanning range is determined according to the position of the target satellite and the estimated spatial pointing; the scanning start angle refers to the angle at which the target scanning range starts; the ending angle refers to the angle at which the target scanning range ends; the target scanning frequency is obtained after optimizing the scanning frequency in the pending scanning strategy, wherein the pending scanning strategy is obtained after screening the historical scanning strategy and the preset scanning strategy; the target scanning strategy is composed of setting the scanning tool, scanning speed, scanning range, scanning frequency, scanning step length and scanning path.

[0027] The beneficial effect of the above technical solution is: by screening out suitable scanning strategies and performing necessary optimization and adjustment according to the current application scenario, target satellite category and communication requirements, the target scanning strategy is obtained, the effectiveness of the scanning strategy is ensured, and the foundation for ensuring smooth satellite communication is laid.

[0028] The embodiment of the present invention provides a method for rapid acquisition of inter-satellite laser communication, and the calculation formula of the strategy matching degree is as follows: ; In the formula, It is expressed as the strategy matching degree of the s-th historical scanning strategy; It is expressed as the scanning success rate of the s-th historical scanning strategy; It is represented as the frequency of occurrence of the current s-th historical scanning strategy; It is represented as the maximum value of the hth first communication demand index in all the second inter-satellite communication record data corresponding to the sth historical scanning strategy; It is represented as the index requirement value of the current h-th first communication requirement; It is represented as the minimum value of the hth first communication demand indicator in all the second inter-satellite communication record data corresponding to the sth historical scanning strategy; It is expressed as the influence weight of the hth first communication demand on the matching degree of the analysis strategy.

[0029] In this embodiment, the first communication demand indicator includes a communication distance indicator, a communication environment indicator and a satellite orbit indicator, wherein the communication distance indicator refers to the communication distance value between satellites; the communication environment indicator refers to the atmospheric density during inter-satellite communication; the satellite orbit indicator refers to the orbital height of the satellite; the influence weight of the first communication demand on the matching degree of the analysis strategy is obtained by solving the matrix constructed after pairwise comparison and relative importance scoring using the hierarchical analysis method.

[0030] The beneficial effect of the above technical solution is that the strategy matching degree can provide a data basis for selecting an appropriate historical scanning strategy, thereby ensuring the effectiveness of the set scanning strategy and laying the foundation for ensuring smooth satellite communication.

[0031] An embodiment of the present invention provides a method for rapid acquisition of inter-satellite laser communication, which adjusts and analyzes a pending satellite pointing vector obtained by analyzing a first satellite parameter to obtain an estimated space pointing, including: Acquire the three-dimensional position coordinates of the target satellite according to the first orbital parameter in the first satellite parameter; After converting the three-dimensional position coordinates of the target satellite into a coordinate system equivalent to the target satellite body, the coordinates are combined with the attitude parameters in the first satellite parameters to calculate and obtain the first satellite pointing; Obtaining and obtaining a pending satellite pointing vector of the target antenna equivalent to the target satellite body according to the installation angle of the target antenna equivalent to the target satellite body and combining the first satellite pointing; The pointing vector of the satellite to be determined is converted from the satellite body coordinate system to the inertial coordinate system; Acquiring a first sensitive parameter in the process of collecting real-time motion data of a target satellite; Inputting the first sensitive parameter after data preprocessing into a pre-established pointing error prediction model to obtain a first error amount; Using the first error quantity to adjust the pointing vector of the pending satellite to obtain the target pointing vector; The target pointing vector is converted into a geographic coordinate system to obtain an estimated spatial pointing.

[0032] In this embodiment, the target satellite refers to two satellites that currently need to establish communication with each other; the first satellite parameters include orbital parameters and attitude parameters, wherein the orbital parameters include semi-major axis, eccentricity, inclination, etc.; the attitude parameters include pitch angle, yaw angle, roll angle, etc.; the three-dimensional position coordinates of the target satellite refer to the position coordinates calculated by using the satellite orbital parameters in combination with the Kepler equation; the first satellite pointing refers to the satellite antenna equivalent to the pointing of the satellite body after converting the three-dimensional position coordinates of the satellite into a coordinate system relative to the satellite body, calculated according to the satellite attitude parameters such as pitch angle, yaw angle, roll angle, etc.

[0033] In this embodiment, the target antenna refers to the antenna on the current target satellite; the installation angle is determined by the existing satellite installation manual; the pending satellite pointing vector refers to the pointing vector of the antenna corresponding to the target satellite body; the inertial coordinate system refers to the reference system in which Newton's laws of motion apply, such as the J2000 coordinate system; the first sensitive parameter is a predetermined parameter that has a significant impact on the pointing error, including the satellite's position, velocity, acceleration, attitude angle and antenna installation angle; the pointing error prediction model refers to a model for predicting the pointing error obtained by training a neural network using pre-processed historical data including the satellite's orbital parameters, attitude parameters, antenna installation angle and corresponding pointing error data as training data.

[0034] In this embodiment, the first error amount refers to the result output after using the first sensitive parameter to input a pre-established pointing error prediction model, that is, the altitude and azimuth of the pointing error; the target pointing vector is obtained after adjusting the pointing vector of the pending satellite using the first error amount; the geographic coordinate system refers to a coordinate system that uses a three-dimensional sphere to define the position on the earth's surface to reference points on the earth's surface through longitude and latitude; the estimated spatial pointing is the spatial pointing of the target antenna relative to the earth obtained by converting the target pointing vector into the geographic coordinate system.

[0035] The beneficial effect of the above technical solution is: by adjusting the pointing vector, the accuracy of the antenna pointing adjustment is improved, thereby reducing the antenna search time and adjustment times, laying the foundation for ensuring smooth satellite communication.

[0036] The embodiment of the present invention provides a method for rapid acquisition of intersatellite laser communication, which performs pointing correction based on the scanning spot result and establishes a target communication link, including: When the target photoelectric sensor preset on the target satellite detects the scanning spot result, it immediately triggers the capture signal; The closed-loop control system receives the capture signal and obtains the light spot position information based on the scanning light spot result; Acquire a first deviation between a target pointing vector and a vector of an ideal incident direction of the laser based on the light spot position information, and generate a direction adjustment signal accordingly; The current target satellite receives and responds to the direction adjustment signal, controls the corresponding mechanical structure to adjust the current estimated space direction to the ideal incident direction of the laser, and immediately triggers the pointing correction signal; After receiving the pointing correction signal, the laser communication module immediately establishes a laser communication link and outputs it as a target communication link.

[0037] In this embodiment, the target photoelectric sensor refers to a device for detecting the light spot formed by the light beam; the capture signal is used to express that the light spot has been successfully captured; the closed-loop control system is a system that can automatically adjust its output to maintain the desired state or performance, and is composed of a controller, an actuator, and a feedback mechanism, wherein the controller is used to process sensor data and generate a control signal; the actuator is used to receive the control signal to control the motor of the mechanical structure; the feedback mechanism is used to generate a pointing correction signal; the closed-loop control system receives the capture signal and obtains the light spot position information based on the scanning light spot result, and then calculates the deviation between the target pointing vector and the ideal incident direction vector of the laser, and generates a direction adjustment signal to control the mechanical structure to adjust the pointing direction.

[0038] In this embodiment, the light spot position information is represented by the pixel position or coordinates on the photoelectric sensor, such as the coordinates of the light spot on the photoelectric sensor array; the first deviation refers to the deviation angle between the actual position of the light spot obtained based on the current light spot position information and the ideal position of the light spot formed by the laser beam incident in the ideal laser incident direction; the direction adjustment signal refers to the signal calculated by the closed-loop control system according to the light spot position information, which is used to adjust the current pointing direction, and contains information such as the direction and size of the pointing adjustment; the mechanical structure includes a rotating motor, a tilting device, etc.; the pointing correction signal is used to indicate that the current pointing correction is completed and the laser communication link can be established; the laser communication module is used to establish a laser communication link immediately after receiving the pointing correction signal; the target communication link refers to a laser communication link used to transmit data.

[0039] The beneficial effect of the above technical solution is: by acquiring the light spot position information in real time based on the captured signal and calculating the deviation vector to adjust the pointing direction, it is ensured that the pointing direction of the communication terminal is accurately adjusted to the ideal incident direction of the laser, which helps to establish a stable and reliable laser communication link and reduce communication interruption or quality degradation caused by pointing deviation.

[0040] The embodiment of the present invention provides a method for rapid acquisition of intersatellite laser communication, which monitors the data communication process of a target satellite based on a target communication link in real time and makes corresponding adjustments when there is a communication hazard, including: Using a set acquisition tool to collect in real time the process of data transmission by the current target satellite based on the target communication link to obtain first transmission status data; Preprocessing the first transmission status data to obtain second transmission status data; Obtaining a first light spot offset and a first signal strength change according to the direction change data in the second transmission status data; If the first light spot offset or the first signal intensity change exceeds the corresponding set change threshold, it is determined that the current direction needs to be adjusted; Inputting the first light spot offset and the first signal intensity change into a pre-established pointing adjustment estimation model to obtain a required pointing adjustment amount; Converting the required orientation adjustment amount into a first orientation adjustment instruction, and controlling a corresponding mechanical structure to adjust the orientation of the current estimated space; A communication risk analysis is performed on the communication change data in the second transmission status data, and if it is determined that the current communication is dangerous, timely repair is performed.

[0041] In this embodiment, the set acquisition tool refers to a tool used to collect in real time various data during the data transmission process of the current target satellite based on the target communication link, such as dedicated data acquisition hardware; the first transmission status data is composed of pointing change data and communication change data, wherein the pointing change data includes the spot offset and the signal strength change; the communication change data includes the data packet loss rate, bit error rate, etc.

[0042] In this embodiment, the second transmission status data is data obtained after preprocessing the first transmission status data; the set change threshold refers to the average of the corresponding maximum value and average value of the light spot offset or signal strength change within a preset time period; the pointing adjustment estimation model is a model obtained by training a neural network with preset training data, and is used to estimate the current pointing adjustment amount, wherein the preset training data refers to data after data preprocessing of historical light spot offsets, historical signal strength changes, and corresponding historical pointing adjustments under different environmental conditions within a preset time period; the pointing adjustment amount required refers to the adjustment amount of the current target satellite antenna pointing, including direction adjustment and distance adjustment.

[0043] In this embodiment, the first pointing adjustment instruction is a pointing adjustment command generated based on the required adjustment amount, and is used to control the corresponding mechanical structure to adjust the pointing of the current target satellite antenna, wherein the mechanical structure includes a rotating motor, a tilting device, and the like.

[0044] The beneficial effects of the above technical solution are: obtaining the first transmission status data by real-time monitoring of the data communication process of the target satellite based on the target communication link; based on the analysis of the first transmission status data, achieving dynamic pointing adjustment and communication hazard repair, which is beneficial to improving the communication efficiency and quality of the satellite communication system.

[0045] The embodiment of the present invention provides a method for rapid acquisition of intersatellite laser communication, which performs communication risk analysis on the communication change data in the second transmission status data, and performs timely repair if it is determined that the current communication is dangerous, including: Compare the communication change data with a set communication change threshold, and mark the communication change data greater than the set communication change threshold as abnormal data; Marking the communication change data which is less than the set communication change threshold and whose first data difference with the set communication change threshold is not less than the set data difference as possible abnormal data; Marking the communication change data which is smaller than the set communication change threshold and whose first data difference with the set communication change threshold is smaller than the set data difference as normal data; According to the marking status of the current communication change data, the communication risk factor of the current target satellite is determined; The calculation formula of the communication risk coefficient is as follows: ;W represents the current communication risk factor; It is expressed as the total amount of communication change data; It is expressed as the amount of possible abnormal data; It is expressed as the absolute difference between the i-th possible abnormal data and the data corresponding to the set communication change threshold; It is expressed as the impact weight of the i-th possible abnormal data on data communication; It is expressed as the amount of abnormal data; It is expressed as the absolute difference between the jth abnormal data and the data corresponding to the set communication change threshold; It is expressed as the impact weight of the j-th abnormal data on data communication; Determine the communication risk level of the current target satellite according to the acquired communication risk coefficient; Taking the communication danger level as a matching condition, obtaining the first possible fault cause from the set level-fault mapping table; Extracting a first detection scheme corresponding to the first possible fault cause for immediate detection to generate a first detection result; Determine the cause of the target fault according to the first detection result; Using the target fault cause as the matching condition, the corresponding repair plan is matched from the set fault-repair plan table for timely repair.

[0046] In this embodiment, the communication change threshold is set to refer to 80% of the maximum value of the communication change data within a preset time period; the communication change data includes the data packet loss rate, bit error rate, etc.; the communication risk coefficient is used to express the communication insecurity level of the current target satellite based on the target communication link for data communication; the communication risk level includes four levels: general, serious, very serious and extremely serious; abnormal data refers to communication change data greater than the set communication change threshold; possible abnormal data refers to communication change data less than the set communication change threshold, and the first data difference with the set communication change threshold is not less than the set data difference; normal data refers to communication change data less than the set communication change threshold, and the first data difference with the set communication change threshold is less than the set data difference; the influence weight of the communication change data on the analysis of the communication insecurity level is obtained by solving the matrix constructed after pairwise comparison and relative importance scoring using the hierarchical analysis method.

[0047] In this embodiment, the set level-fault mapping table is composed of the communication risk level and the corresponding possible fault causes; the first possible fault cause refers to the possible fault cause obtained from the set level-fault mapping table with the current communication risk level as the matching condition, such as unstable communication link, antenna failure, amplifier failure, etc.; the first detection plan refers to the detection plan formulated for the first possible fault cause. For example, if the first possible fault cause is "antenna failure", then the first detection plan includes checking the physical connection of the antenna, using test equipment to measure the transmission and reception performance of the antenna In this embodiment, the first detection result refers to the execution record of the detection scheme corresponding to the current first possible fault cause, including the detection time, the first detection scheme, the detection personnel, and the cause of the fault, etc.; the target fault cause refers to the fault cause in the first detection result, that is, the exact cause of the current communication abnormality, such as an antenna connection error; the repair plan refers to the specific repair measures or steps pre-formulated according to the target fault cause.

[0048] The beneficial effect of the above technical solution is: by conducting communication risk analysis on the data communication process of the target satellite based on the target communication link and taking corresponding solutions to repair it, the accuracy and timeliness of communication fault detection can be improved, which is beneficial to improving the stability and reliability of communication.

[0049] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for rapid acquisition of intersatellite laser communication, characterized in that: include: Step 1: Determine the estimated spatial orientation of the satellite antenna based on the satellite parameters of the target satellite, and scan the scanning area according to the target scanning strategy to obtain the scanning spot result; Step 2: performing pointing correction based on the scanning spot result and establishing a target communication link; Step 3: Monitor the data communication process of the target satellite based on the target communication link in real time, and make corresponding adjustments when there is a communication hazard.

2. The intersatellite laser communication rapid acquisition method according to claim 1, characterized in that: The estimated spatial orientation of the satellite antenna is determined based on the satellite parameters of the target satellite, and the scanning area is scanned according to the target scanning strategy to obtain the scanning spot results, including: Obtain the first satellite parameter of the target satellite at the current moment; Adjusting and analyzing the undetermined satellite pointing vector obtained by analyzing the first satellite parameter to obtain an estimated space pointing; Set the scanning strategy according to the current application requirements to obtain the target scanning strategy; Based on the target scanning strategy and the estimated spatial orientation, a scanning tool is started to scan the scanning area to obtain a scanning spot result.

3. The intersatellite laser communication rapid acquisition method according to claim 2, characterized in that: Set the scanning strategy according to the current application requirements and obtain the target scanning strategy, including: Taking the current application scenario and the target satellite category as screening conditions, extracting the first inter-satellite communication record data from the inter-satellite communication database; If the first intersatellite communication record data does not exist, extracting a corresponding matching preset scanning strategy from the setting strategy table as a pending scanning strategy according to the current application scenario and the target satellite category; If the first inter-satellite communication record data exists, taking the first communication requirement category in the current application requirement as a screening condition, extracting the second inter-satellite communication record data from the first inter-satellite communication record data; If the second intersatellite communication record data does not exist, extracting a corresponding matching preset scanning strategy from the setting strategy table as the pending scanning strategy according to the current application scenario and the target satellite category; If the second intersatellite communication record data exists, extracting the historical scanning strategy from the second intersatellite communication record data; When there is only a single historical scanning strategy, the historical scanning strategy is regarded as a pending scanning strategy; When there are multiple historical scanning strategies, the strategy matching degree is calculated for each current historical scanning strategy; The historical scanning strategy with the largest strategy matching degree is regarded as the pending scanning strategy; Determine the target scanning range based on the position of the target satellite and the estimated spatial orientation; Based on the target scanning range, determining a scanning start angle and an end angle; By analyzing the data transmission volume of the pending scanning strategy in the historical scanning cycle, the scanning frequency in the pending scanning strategy is optimized to obtain the target scanning frequency; The calculation formula of the target scanning frequency is as follows: ; In the formula, It is expressed as the target scanning frequency; It is represented as the scanning frequency in the pending scanning strategy; The corresponding historical scanning period is represented as the maximum data transmission amount transmitted using the pending scanning strategy; It is expressed as the maximum amount of data transmitted using the pending scanning strategy; It is expressed as the current expected data transfer volume; The target scanning range, the scanning start angle and the end angle, and the target scanning frequency are used to adjust the undetermined scanning strategy to obtain a target scanning strategy.

4. The intersatellite laser communication rapid acquisition method according to claim 3, characterized in that: The calculation formula for strategy matching is as follows: ; In the formula, It is expressed as the strategy matching degree of the s-th historical scanning strategy; It is expressed as the scanning success rate of the s-th historical scanning strategy; It is represented as the frequency of occurrence of the current s-th historical scanning strategy; It is represented as the maximum value of the hth first communication demand index in all the second inter-satellite communication record data corresponding to the sth historical scanning strategy; It is represented as the index requirement value of the current h-th first communication requirement; It is represented as the minimum value of the hth first communication demand indicator in all the second inter-satellite communication record data corresponding to the sth historical scanning strategy; It is expressed as the influence weight of the hth first communication demand on the matching degree of the analysis strategy.

5. The intersatellite laser communication rapid acquisition method according to claim 2, characterized in that: The undetermined satellite pointing vector obtained by analyzing the first satellite parameter is adjusted and analyzed to obtain an estimated space pointing, including: Acquire the three-dimensional position coordinates of the target satellite according to the first orbital parameter in the first satellite parameter; After converting the three-dimensional position coordinates of the target satellite into a coordinate system equivalent to the target satellite body, the coordinates are combined with the attitude parameters in the first satellite parameters to calculate and obtain the first satellite pointing; Obtaining and obtaining a pending satellite pointing vector of the target antenna equivalent to the target satellite body according to the installation angle of the target antenna equivalent to the target satellite body and combining the first satellite pointing; The pointing vector of the satellite to be determined is converted from the satellite body coordinate system to the inertial coordinate system; Acquiring a first sensitive parameter in the process of collecting real-time motion data of a target satellite; Inputting the first sensitive parameter after data preprocessing into a pre-established pointing error prediction model to obtain a first error amount; Using the first error quantity to adjust the pointing vector of the pending satellite to obtain the target pointing vector; The target pointing vector is converted into a geographic coordinate system to obtain an estimated spatial pointing.

6. The intersatellite laser communication rapid acquisition method according to claim 1, characterized in that: Pointing correction is performed based on the scanning spot result, and a target communication link is established, including: When the target photoelectric sensor preset on the target satellite detects the scanning spot result, it immediately triggers the capture signal; The closed-loop control system receives the capture signal and obtains the light spot position information based on the scanning light spot result; Acquire a first deviation between a target pointing vector and a vector of an ideal incident direction of the laser based on the light spot position information, and generate a direction adjustment signal accordingly; The current target satellite receives and responds to the direction adjustment signal, controls the corresponding mechanical structure to adjust the current estimated space direction to the ideal incident direction of the laser, and immediately triggers the pointing correction signal; After receiving the pointing correction signal, the laser communication module immediately establishes a laser communication link and outputs it as a target communication link.

7. The intersatellite laser communication rapid acquisition method according to claim 1, characterized in that: Monitor the data communication process of the target satellite based on the target communication link in real time, and make corresponding adjustments when there is a communication hazard, including: Using a set acquisition tool to collect in real time the process of data transmission by the current target satellite based on the target communication link to obtain first transmission status data; Preprocessing the first transmission status data to obtain second transmission status data; Obtaining a first light spot offset and a first signal strength change according to the direction change data in the second transmission status data; If the first light spot offset or the first signal intensity change exceeds the corresponding set change threshold, it is determined that the current direction needs to be adjusted; Inputting the first light spot offset and the first signal intensity change into a pre-established pointing adjustment estimation model to obtain a required pointing adjustment amount; Converting the required orientation adjustment amount into a first orientation adjustment instruction, and controlling a corresponding mechanical structure to adjust the orientation of the current estimated space; A communication risk analysis is performed on the communication change data in the second transmission status data, and if it is determined that the current communication is dangerous, timely repair is performed.

8. The intersatellite laser communication rapid acquisition method according to claim 7, characterized in that: Performing communication risk analysis on the communication change data in the second transmission status data, and if it is determined that the current communication is dangerous, performing timely repair, including: Compare the communication change data with a set communication change threshold, and mark the communication change data greater than the set communication change threshold as abnormal data; Marking the communication change data which is less than the set communication change threshold and whose first data difference with the set communication change threshold is not less than the set data difference as possible abnormal data; Marking communication change data that is less than a set communication change threshold and whose first data difference with the set communication change threshold is less than a set data difference as normal data; According to the marking status of the current communication change data, the communication risk factor of the current target satellite is determined; The calculation formula of the communication risk coefficient is as follows: ;W represents the current communication risk factor; It is expressed as the total amount of communication change data; It is expressed as the amount of possible abnormal data; It is expressed as the absolute difference between the i-th possible abnormal data and the data corresponding to the set communication change threshold; It is expressed as the impact weight of the i-th possible abnormal data on data communication; It is expressed as the amount of abnormal data; It is expressed as the absolute difference between the jth abnormal data and the data corresponding to the set communication change threshold; It is expressed as the impact weight of the j-th abnormal data on data communication; According to the acquired communication risk coefficient, the communication risk level of the current target satellite is determined; Taking the communication danger level as a matching condition, obtaining the first possible fault cause from the set level-fault mapping table; Extracting a first detection scheme corresponding to the first possible fault cause for immediate detection to generate a first detection result; Determine the cause of the target fault according to the first detection result; With the target fault cause as the matching condition, the corresponding repair plan is matched from the set fault-repair plan table for timely repair.

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