Inter-satellite laser communication fast acquisition method

Abstract

The application provides a kind of inter-satellite laser communication fast acquisition method, it is related to laser communication technical field, comprising: the estimated space direction of satellite antenna is determined based on the satellite parameter of target satellite, and scanning is carried out according to target scanning strategy, and the scanning spot result is obtained;Based on the scanning spot result, the pointing correction is carried out, and the target communication link is established;Real-time monitoring target satellite data communication process based on target communication link, and when there is communication danger, corresponding adjustment is carried out.The estimated space direction of satellite antenna is determined based on the satellite parameter of target satellite;The communication link is established after the pointing correction based on the scanning spot result;Real-time monitoring satellite communication process based on communication link, and when it is found that there is an abnormality in communication process, response is made, and the communication stability and reliability between satellites are effectively enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser communication, in particular to a kind of inter-satellite laser communication fast acquisition method. BACKGROUND

[0002] In recent years, as an important means of future space communication, inter-satellite laser communication has the advantages of large transmission capacity, strong anti-interference ability and good confidentiality. However, due to the complexity of space environment and the particularity of laser communication, the acquisition process of inter-satellite laser communication system faces many challenges. The traditional acquisition method is difficult to meet the stable demand of modern high-speed laser communication. Therefore, how to improve the communication stability and reliability between satellites has become one of the current research focuses

[0003] Therefore, the present application provides an inter-satellite laser communication fast acquisition method. SUMMARY

[0004] The present application provides an inter-satellite laser communication fast acquisition method, which determines the estimated spatial pointing of the satellite antenna based on the satellite parameters of the target satellite, establishes the communication link after pointing correction based on the scanning spot results, and monitors the communication process of the target satellite based on the target communication link in real time, and responds when an abnormality is found in the communication process, effectively enhancing the communication stability and reliability between satellites.

[0005] The present application provides an inter-satellite laser communication fast acquisition method, which includes:

[0006] Step 1: Determine the estimated spatial pointing 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 results;

[0007] Step 2: Perform pointing correction based on the scanning spot results, and establish the target communication link;

[0008] 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 risk.

[0009] Preferably, the estimated spatial pointing 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, which includes:

[0010] Obtain the first satellite parameters of the target satellite at the current time;

[0011] Adjust and analyze the undetermined satellite pointing vector obtained by analyzing the first satellite parameters to obtain the estimated spatial pointing;

[0012] Set the scanning strategy according to the current application requirements to obtain the target scanning strategy;

[0013] Based on the target scanning strategy and the estimated spatial pointing, a scanning tool is started to scan the scanning area to obtain a scanning spot result.

[0014] Preferably, the target scanning strategy is obtained by setting a scanning strategy according to current application requirements, including:

[0015] The first inter-satellite communication record data is extracted from the inter-satellite communication database by taking the current application scenario and the target satellite category as screening conditions.

[0016] If the first inter-satellite communication record data does not exist, a corresponding matching preset scanning strategy is extracted from the set strategy table as the pending scanning strategy according to the current application scenario and the target satellite category.

[0017] If the first inter-satellite communication record data exists, the second inter-satellite communication record data is extracted from the first inter-satellite communication record data by taking the first communication requirement category in the current application requirement as a screening condition.

[0018] If the second inter-satellite communication record data does not exist, a corresponding matching preset scanning strategy is extracted from the set strategy table as the pending scanning strategy according to the current application scenario and the target satellite category.

[0019] If the second inter-satellite communication record data exists, a historical scanning strategy is extracted from the second inter-satellite communication record data.

[0020] When there is only a single historical scanning strategy, the historical scanning strategy is regarded as the pending scanning strategy.

[0021] When there are multiple historical scanning strategies, a strategy matching degree is calculated for each current historical scanning strategy.

[0022] The historical scanning strategy with the largest strategy matching degree is regarded as the pending scanning strategy.

[0023] The target scanning range is determined according to the position and the estimated spatial pointing of the target satellite.

[0024] The scanning start angle and the scanning end angle are determined based on the target scanning range.

[0025] The scanning frequency in the pending scanning strategy is optimized by analyzing the data transmission amount of the pending scanning strategy in a historical scanning period to obtain a target scanning frequency.

[0026] The calculation formula of the target scanning frequency is as follows:

[0027] In the formula, ftarget represents the target scanning frequency; fcurrent represents the scanning frequency in the pending scanning strategy; and fhistory represents the historical scanning frequency. ​​a corresponding historical scanning period represented as a maximum data transmission volume transmitted by using the pending scanning strategy; a maximum data transmission volume represented as being transmitted by using the pending scanning strategy; a current expected data transmission volume;

[0028] adjusting the pending scanning strategy by using the target scanning range, the scanning start angle and the termination angle, and the target scanning frequency, to obtain a target scanning strategy.

[0029] Preferably, the calculation formula of the strategy matching degree is as follows:

[0030] ; in the formula, a strategy matching degree of the s-th historical scanning strategy; a scanning success rate of the s-th historical scanning strategy; a current appearance frequency of the s-th historical scanning strategy; an index maximum value of the h-th first communication demand index corresponding to all the second inter-satellite communication record data of the s-th historical scanning strategy; an index demand value of the current h-th first communication demand; an index minimum value of the h-th first communication demand index corresponding to all the second inter-satellite communication record data of the s-th historical scanning strategy; an influence weight of the h-th first communication demand on the analysis strategy matching degree.

[0031] Preferably, the pending satellite pointing vector obtained by analyzing the first satellite parameters is adjusted and analyzed to obtain an estimated space pointing, including:

[0032] obtaining a three-dimensional position coordinate of the target satellite according to the first orbit parameter in the first satellite parameters;

[0033] converting the three-dimensional position coordinate of the target satellite into a coordinate system corresponding to the target satellite body, and combining the attitude parameter in the first satellite parameters to calculate a first satellite pointing;

[0034] obtaining and combining the installation angle of the target antenna corresponding to the target satellite body with the first satellite pointing to obtain a pending satellite pointing vector of the target antenna corresponding to the target satellite body;

[0035] converting the pending satellite pointing vector from the satellite body coordinate system into an inertial coordinate system;

[0036] obtaining a first sensitivity parameter in the process of collecting real-time motion data of the target satellite;

[0037] inputting the first sensitivity parameter after data preprocessing into a pre-established pointing error prediction model to obtain a first error amount;

[0038] adjusting the pointing vector of the to-be-determined satellite using the first error amount to obtain a target pointing vector;

[0039] converting the target pointing vector into a geographic coordinate system to obtain an estimated spatial pointing.

[0040] Preferably, the pointing correction is performed based on the scanning spot result, and a target communication link is established, including:

[0041] When the target optoelectronic sensor pre-installed on the target satellite detects the scanning spot result, an acquisition signal is triggered immediately;

[0042] The closed-loop control system receives the acquisition signal and acquires spot position information based on the scanning spot result;

[0043] A first deviation between the target pointing vector and the vector of the ideal laser incidence direction is obtained based on the spot position information, and a direction adjustment signal is generated correspondingly;

[0044] After the current target satellite receives and responds to the direction adjustment signal and controls the corresponding mechanical structure to adjust the current estimated spatial pointing to the ideal laser incidence direction, a pointing correction signal is triggered immediately;

[0045] After the laser communication module receives the pointing correction signal, a laser communication link is established immediately, and is output as the target communication link.

[0046] Preferably, the data communication process of the target satellite based on the target communication link is monitored in real time, and corresponding adjustments are made when there is a communication risk, including:

[0047] The process of the current target satellite based on the target communication link for data transmission is collected in real time using a set collection tool to obtain first transmission status data;

[0048] The first transmission status data is preprocessed to obtain second transmission status data;

[0049] According to the pointing change data in the second transmission status data, a first spot offset and a first signal strength change are obtained;

[0050] If the first spot offset or the first signal strength change exceeds the corresponding set change threshold, it is determined that the current pointing needs to be adjusted;

[0051] The first spot offset and the first signal strength change are input into a pre-established pointing adjustment prediction model to obtain a pointing adjustment amount;

[0052] convert the pointing adjustment amount into a first pointing adjustment instruction, and control a corresponding mechanical structure to adjust the current estimated spatial pointing;

[0053] perform communication danger analysis on the communication change data in the second transmission condition data, and if it is determined that there is current communication danger, perform timely repair.

[0054] Preferably, the communication danger analysis on the communication change data in the second transmission condition data, if it is determined that there is current communication danger, includes:

[0055] comparing the communication change data with a set communication change threshold value, and marking the communication change data greater than the set communication change threshold value as abnormal data;

[0056] marking the communication change data less than the set communication change threshold value and having a first data difference with the set communication change threshold value not less than a set data difference as possible abnormal data;

[0057] marking the communication change data less than the set communication change threshold value and having a first data difference with the set communication change threshold value less than the set data difference as normal data;

[0058] determining a communication danger coefficient of the current target satellite according to the marking of the current communication change data;

[0059] wherein the calculation formula of the communication danger coefficient is as follows:

[0060] wherein W represents the current communication danger coefficient; represents the total amount of communication change data; represents the amount of possible abnormal data; represents the absolute difference between the ith possible abnormal data and the corresponding set communication change threshold value; represents the influence weight of the ith possible abnormal data on data communication; represents the amount of abnormal data; represents the absolute difference between the jth abnormal data and the corresponding set communication change threshold value; represents the influence weight of the jth abnormal data on data communication;

[0061] determining a communication danger level of the current target satellite according to the obtained communication danger coefficient;

[0062] obtaining a first possible failure cause from a set level-failure mapping table according to the communication danger level as a matching condition;

[0063] extracting a first detection scheme corresponding to the first possible failure cause for immediate detection to generate a first detection result;

[0064] According to the first detection result, a target fault cause is determined;

[0065] A corresponding repair scheme is matched from a set fault-repair scheme table with the target fault cause as a matching condition to perform timely repair.

[0066] Compared with the prior art, the application has the following beneficial effects:

[0067] The estimated spatial pointing of the satellite antenna is determined based on the satellite parameters of the target satellite, the pointing is corrected based on the scanning spot result to establish a communication link, the communication process of the satellite based on the communication link is monitored in real time, and a response is made when an abnormality is found in the communication process, thereby effectively enhancing the communication stability and reliability between satellites.

[0068] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims.

[0069] The technical solutions of the present application will be further described in detail below with the help of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0070] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments, and are used to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0071] Figure 1 A flowchart of an inter-satellite laser communication fast acquisition method in an embodiment of the present application. DETAILED DESCRIPTION

[0072] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and do not constitute a limitation on the present application.

[0073] The embodiment of the present application provides an inter-satellite laser communication fast acquisition method, as shown in Figure 1 The method comprises the following steps:

[0074] Step 1: determining the estimated spatial pointing of the satellite antenna based on the satellite parameters of the target satellite, and scanning the scanning area according to the target scanning strategy to obtain a scanning spot result;

[0075] Step 2: correcting the pointing based on the scanning spot result, and establishing a target communication link;

[0076] Step 3: Real-time monitoring of the target satellite based on the data communication process of the target communication link, and making corresponding adjustments when there is a communication danger.

[0077] In this embodiment, the target satellite refers to the satellite that currently needs to establish communication with another satellite; the target scanning strategy is composed of setting scanning tools, scanning speed, scanning range, scanning frequency, scanning step and scanning path, etc., wherein the setting scanning tools include high-speed reflective vibration mirrors, piezoelectric ceramic deflection mirrors, etc.; the scanning spot result refers to the actual scanning result obtained by using the setting scanning tools to scan according to the target scanning strategy, wherein the scanning spot result includes spot position information, shape and size, intensity distribution, signal quality and time stamp, etc.; the target scanning strategy is obtained according to the current application requirement setting scanning strategy, and the application requirement includes application scene, communication requirement, etc.; the scanning area refers to the scanning range in the target scanning strategy; and the target communication link refers to the laser communication link used for transmitting data between satellites.

[0078] 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 the communication link after the pointing correction based on the scanning spot result; real-time monitoring of the communication process of the satellite based on the communication link, and responding when an abnormality is found in the communication process, effectively enhancing the communication stability and reliability between satellites.

[0079] The embodiment of the application provides an inter-satellite laser communication fast acquisition method, which determines the estimated spatial pointing of the satellite antenna based on the satellite parameters of the target satellite, and scans the scanning area according to the target scanning strategy to obtain the scanning spot result, including:

[0080] Obtaining the first satellite parameter of the target satellite at the current time;

[0081] Adjusting and analyzing the to-be-determined satellite pointing vector obtained by analyzing the first satellite parameter to obtain the estimated spatial pointing;

[0082] Setting the scanning strategy according to the current application requirement to obtain the target scanning strategy;

[0083] Based on the target scanning strategy and the estimated spatial pointing, starting the setting scanning tool to scan the scanning area to obtain the scanning spot result.

[0084] In the embodiment, the target satellite refers to a satellite that needs to establish communication with another satellite at present; the first satellite parameter includes an orbit parameter and an attitude parameter, wherein the orbit parameter includes a semi-major axis, an eccentricity, an inclination, etc.; the attitude parameter includes a pitch angle, a yaw angle, a roll angle, etc.; the to-be-determined satellite pointing vector refers to a pointing vector of a target antenna corresponding to a body of a target satellite, wherein the target antenna refers to an antenna on the target satellite; the target pointing vector is obtained by adjusting the to-be-determined satellite pointing vector; the estimated spatial pointing is a 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 requirement is constituted by an application scenario, a communication requirement, etc., wherein the application scenario includes satellite laser communication, remote data transmission, satellite data monitoring, etc.; the communication requirement includes a communication distance, a communication environment, a satellite orbit, etc.

[0085] In the embodiment, the target scanning strategy is constituted by a set scanning tool, a scanning speed, a scanning range, a scanning frequency, a scanning step, and a scanning path, etc.; the scanning area refers to the scanning range in the target scanning strategy; the scanning spot result refers to an actual scanning result obtained by scanning according to the target scanning strategy by using the set scanning tool, wherein the scanning spot result includes spot position information, shape and size, intensity distribution, signal quality, and a time stamp, etc.

[0086] The above technical solution has the beneficial effects that: by acquiring satellite parameters, adjusting a pointing vector, and then extracting a matched scanning strategy for spot capturing, the accuracy and efficiency of satellite scanning are effectively improved, and the operation cost and time cost are also reduced.

[0087] The embodiment of the application provides an inter-satellite laser communication fast capturing method, which sets a scanning strategy according to a current application requirement to obtain a target scanning strategy, including:

[0088] The first inter-satellite communication record data is extracted from the inter-satellite communication database by taking the current application scenario and the target satellite category as the screening conditions;

[0089] If the first inter-satellite communication record data does not exist, a corresponding matched preset scanning strategy is extracted from the set strategy table as a to-be-determined scanning strategy according to the current application scenario and the target satellite category;

[0090] If the first inter-satellite communication record data exists, the second inter-satellite communication record data is extracted from the first inter-satellite communication record data by taking the first communication requirement category in the current application requirement as the screening condition;

[0091] If the second inter-satellite communication record data does not exist, a corresponding matched preset scanning strategy is extracted from the set strategy table as a to-be-determined scanning strategy according to the current application scenario and the target satellite category;

[0092] if the second intersatellite communication record data exists, extracting a historical scanning strategy from the second intersatellite communication record data;

[0093] when there is only a single historical scanning strategy, regarding the historical scanning strategy as a pending scanning strategy;

[0094] when there are multiple historical scanning strategies, calculating a strategy matching degree for each current historical scanning strategy;

[0095] regarding the historical scanning strategy with the largest strategy matching degree as the pending scanning strategy;

[0096] determining a target scanning range according to the position of the target satellite and the estimated spatial pointing;

[0097] determining a scanning start angle and a scanning end angle based on the target scanning range;

[0098] optimizing the scanning frequency in the pending scanning strategy by analyzing the data transmission amount of the pending scanning strategy in a historical scanning period, to obtain a target scanning frequency;

[0099] wherein the calculation formula of the target scanning frequency is as follows:

[0100] ; wherein, represents the target scanning frequency; represents the scanning frequency in the pending scanning strategy; represents the corresponding historical scanning period of the maximum data transmission amount transmitted by the pending scanning strategy; represents the maximum data transmission amount transmitted by the pending scanning strategy; represents the current expected data transmission amount;

[0101] adjusting the pending scanning strategy by using the target scanning range, the scanning start angle and the scanning end angle, and the target scanning frequency, to obtain a target scanning strategy.

[0102] In this embodiment, the current application scenario refers to inter-satellite laser communication, the target satellite category refers to a specific type to which the current target satellite belongs, such as a fixed communication satellite, a mobile communication satellite, a data relay satellite, and the like, the target satellite refers to a satellite that needs to establish communication with another satellite at present, the inter-satellite 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, and the like, the first inter-satellite communication record data refers to historical laser communication record data in which the historical application scenario and the communication satellite category are respectively the same as the current application scenario and the target satellite category, the set strategy table is composed of application scenarios, communication satellite categories, and corresponding preset scanning strategies, wherein the preset scanning strategy is a scanning strategy set by simulating the communication process of different categories of communication satellites in different application scenarios in advance, and 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, and the communication environment category includes clear atmosphere and atmospheric interference.

[0103] In this embodiment, the second inter-satellite communication record data refers to the first inter-satellite communication record data in which the historical communication demand category is consistent with the current first communication demand category, the strategy matching degree is used to represent the adaptation degree of the current historical scanning strategy to the inter-satellite laser communication of the target satellite, the estimated spatial pointing is obtained by converting the target pointing vector into a geographical coordinate system, wherein the target pointing vector is obtained by adjusting the pending satellite pointing vector, the pending satellite pointing vector refers to the pointing vector of the target antenna corresponding to the 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 for communication, which is calculated by combining the orbit 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 termination angle refers to the angle at which the target scanning range ends, the target scanning frequency is obtained by optimizing the scanning frequency in the pending scanning strategy, wherein the pending scanning strategy is obtained by screening the historical scanning strategy and the preset scanning strategy, and the target scanning strategy is composed of a set scanning tool, a scanning speed, a scanning range, a scanning frequency, a scanning step, and a scanning path.

[0104] The beneficial effects of the above technical solutions are that by screening the appropriate scanning strategy according to the current application scenario, the target satellite category, and the communication demand, and performing necessary optimization and adjustment, the target scanning strategy is obtained, the effectiveness of the scanning strategy is ensured, and the foundation for ensuring satellite communication is laid.

[0105] The embodiment of the present application provides a kind of inter-satellite laser communication fast acquisition method, the calculation formula of strategy matching degree is as follows:

[0106] In the formula, It is the strategy matching degree as the s-th historical scanning strategy; It is the scanning success rate as the s-th historical scanning strategy; It is the appearance frequency as the s-th historical scanning strategy; It is the index maximum value of the h-th first communication demand index corresponding to all second inter-satellite communication record data as the s-th historical scanning strategy; It is the index demand value of the current h-th first communication demand; It is the index minimum value of the h-th first communication demand index corresponding to all second inter-satellite communication record data as the s-th historical scanning strategy; It is the influence weight of the h-th first communication demand to analysis strategy matching degree.

[0107] In the embodiment, the first communication demand index includes communication distance index, communication environment index and satellite orbit index, wherein the communication distance index refers to the communication distance value between satellites;The communication environment index refers to the atmospheric density during inter-satellite communication;The satellite orbit index refers to the orbit height of the satellite;The influence weight of the first communication demand to analysis strategy matching degree is obtained by solving the matrix constructed by pairwise comparison and relative importance score using analytic hierarchy process.

[0108] The beneficial effects of the above technical solution are: the strategy matching degree can provide data basis for selecting appropriate historical scanning strategy, thereby ensuring the effectiveness of the set scanning strategy, and laying a foundation for ensuring satellite communication smoothly.

[0109] The embodiment of the present application provides an inter-satellite laser communication fast acquisition method, adjusts and analyzes the undetermined satellite pointing vector obtained by analyzing the first satellite parameters to obtain the estimated space pointing, comprising:

[0110] Obtain the three-dimensional position coordinates of the target satellite according to the first orbit parameter in the first satellite parameters;

[0111] Convert the three-dimensional position coordinates of the target satellite into the coordinate system corresponding to the target satellite body, and combine the attitude parameter in the first satellite parameters to calculate and obtain the first satellite pointing;

[0112] Obtain the installation angle of the target antenna corresponding to the target satellite body, and combine the first satellite pointing to obtain the undetermined satellite pointing vector of the target antenna corresponding to the target satellite body;

[0113] convert the to-be-determined satellite pointing vector from a satellite body coordinate system into an inertial coordinate system;

[0114] acquire a first sensitive parameter in a process of acquiring real-time motion data of a target satellite;

[0115] input the first sensitive parameter after data preprocessing into a pointing error prediction model established in advance to obtain a first error amount;

[0116] adjust the to-be-determined satellite pointing vector by using the first error amount to obtain a target pointing vector;

[0117] convert the target pointing vector into a geographic coordinate system to obtain an estimated spatial pointing.

[0118] In this embodiment, the target satellite refers to two satellites that currently need to establish communication with each other; the first satellite parameter includes an orbit parameter and an attitude parameter, wherein the orbit parameter includes a semi-major axis, an eccentricity, an inclination, etc.; the attitude parameter includes a pitch angle, a yaw angle, a roll angle, etc.; the three-dimensional position coordinates of the target satellite refer to position coordinates calculated by using satellite orbit parameters in combination with Kepler's equation; and the first satellite pointing refers to a pointing of a satellite antenna equivalent to a satellite body calculated according to the pitch angle, the yaw angle, the roll angle, etc. of the satellite attitude parameter after the three-dimensional position coordinates of the satellite are converted into a coordinate system relative to the satellite body.

[0119] In this embodiment, the target antenna refers to an antenna on the current target satellite; the installation angle is determined through an existing satellite installation manual; the to-be-determined satellite pointing vector refers to a pointing vector of the antenna equivalent to the corresponding target satellite body; the inertial coordinate system refers to a reference system in which Newton's law of motion is established, such as a J2000 coordinate system; the first sensitive parameter is a parameter that has a significant influence on the pointing error and is determined in advance, including the position, the velocity, the acceleration, the attitude angle of the satellite, and the antenna installation angle; and the pointing error prediction model refers to a model for predicting the pointing error obtained by training a neural network by using historical data including the orbit parameter, the attitude parameter, the antenna installation angle of the satellite, and corresponding pointing error data as training data in advance.

[0120] In this embodiment, the first error amount refers to a result output after the first sensitive parameter is input into the pointing error prediction model established in advance, that is, the high-low angle and the azimuth angle of the pointing error; the target pointing vector is obtained by adjusting the to-be-determined satellite pointing vector by using the first error amount; the geographic coordinate system refers to a coordinate system that uses a three-dimensional spherical surface to define the position of the earth's surface to realize the referencing of the earth's surface point by longitude and latitude; and the estimated spatial pointing is a spatial pointing of the target antenna relative to the earth obtained by converting the target pointing vector into the geographic coordinate system.

[0121] The beneficial effects of the above technical scheme are: the pointing vector is adjusted, the accuracy of antenna pointing adjustment is improved, the search time and adjustment times of the antenna are reduced, and the foundation for ensuring smooth satellite communication is laid.

[0122] The embodiment of the application provides a fast acquisition method for inter-satellite laser communication, and the pointing correction is performed based on the scanning spot result, and the target communication link is established, and the method comprises the following steps:

[0123] When the target photoelectric sensor preset on the target satellite detects the scanning spot result, an acquisition signal is triggered immediately;

[0124] The closed-loop control system receives the acquisition signal, and acquires the spot position information based on the scanning spot result;

[0125] The first deviation between the target pointing vector and the vector of the ideal laser incidence direction is acquired based on the spot position information, and a direction adjustment signal is generated correspondingly;

[0126] The current target satellite receives and responds to the direction adjustment signal, controls the corresponding mechanical structure to adjust the current estimated space pointing to the ideal laser incidence direction, and triggers a pointing correction signal immediately;

[0127] The laser communication module receives the pointing correction signal, establishes a laser communication link immediately, and outputs the laser communication link as a target communication link.

[0128] In the embodiment, the target photoelectric sensor is a device for detecting a spot formed by a light beam; the acquisition signal is used to represent that the spot has been successfully acquired at present; the closed-loop control system is a system capable of automatically adjusting its output to maintain a 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 acquisition signal, acquires the spot position information based on the scanning spot result, then calculates the deviation between the target pointing vector and the vector of the ideal laser incidence direction, and generates a direction adjustment signal to control the mechanical structure to perform pointing adjustment.

[0129] In the embodiment, the spot position information is represented by pixel position or coordinate on the photosensor, such as the coordinate of the spot on the photosensor array; the first deviation refers to the deviation angle between the actual position of the spot obtained based on the current spot position information and the ideal position of the spot formed by the laser beam according to the ideal incident direction of the laser; the direction adjustment signal refers to the signal calculated by the closed-loop control system according to the spot position information for adjusting the current pointing, containing the direction and size of the pointing adjustment and the like; the mechanical structure includes a rotating motor, a tilting device and the like; 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 immediately establish the laser communication link after receiving the pointing correction signal; and the target communication link refers to the laser communication link for transmitting data.

[0130] The technical scheme has the beneficial effects that: the spot position information is obtained in real time based on the capture signal, and the deviation vector is calculated to adjust the pointing, so that the pointing 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 reduces the communication interruption or quality degradation caused by the pointing deviation.

[0131] The embodiment of the application provides a kind of inter-satellite laser communication fast capture method, real-time monitoring target satellite based on target communication link data communication process, and when there is communication danger, corresponding adjustment is carried out, comprising:

[0132] Real-time acquisition tool is used to acquire the process that current target satellite carries out data transmission based on target communication link, and first transmission condition data is obtained;

[0133] The first transmission condition data is preprocessed to obtain second transmission condition data;

[0134] According to the pointing change data in the second transmission condition data, first spot offset and first signal intensity change are obtained;

[0135] If first spot offset or first signal intensity change exceeds corresponding set change threshold, it is determined that the current pointing needs to be adjusted;

[0136] The first spot offset and the first signal intensity change are input into the pre-established pointing adjustment estimation model to obtain the pointing adjustment amount;

[0137] The pointing adjustment amount is converted into a first pointing adjustment instruction to control the corresponding mechanical structure to adjust the current estimated space pointing;

[0138] The communication change data in the second transmission condition data is analyzed for communication danger, and if it is determined that the current communication is dangerous, timely repair is carried out.

[0139] In the embodiment, the acquisition tool refers to a tool for acquiring various data in the process of real-time acquisition of the current target satellite based on the target communication link for data transmission, such as a dedicated data acquisition hardware; the first transmission status data is composed of the pointing change data and the communication change data, wherein the pointing change data includes the spot offset and the signal strength change; the communication change data includes the loss rate of data packets, the bit error rate, and the like.

[0140] In the embodiment, the second transmission status data is data obtained after the first transmission status data is preprocessed; the change threshold is the average of the maximum value and the average value of the spot offset or the signal strength change in a preset time period; the pointing adjustment estimation model is a model obtained by training a neural network using preset training data, and is used to estimate the current pointing adjustment amount, wherein the preset training data refers to data obtained by preprocessing historical spot offsets, historical signal strength changes, and corresponding historical pointing adjustment amounts under different environmental conditions in a preset time period; the pointing adjustment amount refers to the adjustment amount of the pointing of the current target satellite antenna, including the direction adjustment and the distance adjustment.

[0141] In the embodiment, the first pointing adjustment instruction is a pointing adjustment command generated based on the 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.

[0142] The above technical solution has the following beneficial effects: the first transmission status data is obtained 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, the pointing dynamic adjustment and the communication danger repair are realized, which is beneficial to improving the communication efficiency and quality of the satellite communication system.

[0143] The embodiment of the application provides a method for quickly capturing inter-satellite laser communication, and the communication change data in the second transmission status data is subjected to communication danger analysis.

[0144] The communication change data is compared with the set communication change threshold, and the communication change data greater than the set communication change threshold is marked as abnormal data;

[0145] The communication change data smaller than the set communication change threshold and having a first data difference with the set communication change threshold smaller than a set data difference is marked as normal data.

[0146] The communication change data smaller than the set communication change threshold and having a first data difference with the set communication change threshold smaller than a set data difference is marked as normal data.

[0147] According to the marking of the current communication change data, the communication danger coefficient of the current target satellite is determined.

[0148] The communication danger coefficient is calculated according to the following formula:

[0149] W represents the current communication danger coefficient; represents the total amount of communication change data; represents the amount of possible abnormal data; represents the absolute difference between the ith possible abnormal data and the corresponding set communication change threshold value; represents the influence weight of the ith possible abnormal data on data communication; represents the amount of abnormal data; represents the absolute difference between the jth abnormal data and the corresponding set communication change threshold value; represents the influence weight of the jth abnormal data on data communication;

[0150] According to the obtained communication danger coefficient, the communication danger level of the current target satellite is determined;

[0151] The first possible failure cause is obtained from the set level-failure mapping table by taking the communication danger level as the matching condition;

[0152] The first detection scheme corresponding to the first possible failure cause is extracted for immediate detection, and a first detection result is generated;

[0153] According to the first detection result, the target failure cause is determined;

[0154] The target failure cause is taken as the matching condition, and the corresponding repair scheme is matched from the set failure-repair scheme table for timely repair.

[0155] In this embodiment, the set communication change threshold value refers to 80% of the maximum value of communication change data in a preset time period; the communication change data includes the loss rate of data packets, the bit error rate, etc.; the communication danger coefficient is used to represent the degree of communication insecurity of the current target satellite based on the target communication link for data communication; the communication danger level includes general, serious, very serious, and extremely serious; the abnormal data refers to the communication change data greater than the set communication change threshold value; the possible abnormal data refers to the communication change data less than the set communication change threshold value and having a first data difference with the set communication change threshold value not less than a set data difference; the normal data refers to the communication change data less than the set communication change threshold value and having a first data difference with the set communication change threshold value less than a set data difference; and the influence weight of the communication change data on the analysis of the degree of communication insecurity is obtained by solving a matrix constructed through pairwise comparison and relative importance scoring using the analytic hierarchy process.

[0156] In the embodiment, the set level-fault mapping table is composed of a communication danger level and a corresponding possible fault cause; the first possible fault cause refers to a possible fault cause obtained from the set level-fault mapping table with the current communication danger level as a matching condition, such as unstable communication link, antenna fault, amplifier failure, and the like; and the first detection scheme refers to a detection plan formulated for the first possible fault cause, such as, if the first possible fault cause is "antenna fault", the first detection scheme includes checking the physical connection of the antenna and measuring the transmitting and receiving performance of the antenna using a test device

[0157] In the embodiment, the first detection result refers to an execution record of performing detection of the corresponding detection scheme of the current first possible fault cause, including detection time, the first detection scheme, a detection personnel, and a fault cause, and the like; the target fault cause refers to a fault cause in the first detection result, that is, a determined exact cause of the current communication abnormality, such as antenna connection error; and the repair scheme refers to a specific repair measure or step formulated in advance according to the target fault cause.

[0158] The above technical scheme has the beneficial effects that: by performing communication danger analysis on a target satellite based on a data communication process of a target communication link and taking a corresponding scheme for repair, the accuracy and timeliness of communication fault detection can be improved, and thus the stability and reliability of communication can be improved.

[0159] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalent technologies, then the present application also intends to include these modifications and variations.

Claims

1. An inter-satellite laser communication fast acquisition method, characterized in that, The method comprises the following steps: Step 1: determining an estimated spatial pointing of a satellite antenna based on satellite parameters of a target satellite, and scanning a scanning area according to a target scanning strategy to obtain a scanning spot result; The target scanning strategy comprises: extracting first inter-satellite communication record data from an inter-satellite communication database with the current application scenario and the target satellite category as screening conditions; if there is no first inter-satellite communication record data, extracting a corresponding matching preset scanning strategy from a set strategy table as a pending scanning strategy according to the current application scenario and the target satellite category; if there is first inter-satellite communication record data, extracting second inter-satellite communication record data from the first inter-satellite communication record data with the first communication demand category in the current application demand as screening conditions; if there is no second inter-satellite communication record data, extracting a corresponding matching preset scanning strategy from a set strategy table as a pending scanning strategy according to the current application scenario and the target satellite category; if there is second inter-satellite communication record data, extracting a historical scanning strategy from the second inter-satellite communication record data; when there is only a single historical scanning strategy, regarding the historical scanning strategy as the pending scanning strategy; when there are multiple historical scanning strategies, calculating a strategy matching degree for each historical scanning strategy; regarding the historical scanning strategy with the largest strategy matching degree as the pending scanning strategy; determining a target scanning range according to the position and the estimated spatial pointing of the target satellite; determining a scanning start angle and a scanning end angle based on the target scanning range; optimizing a scanning frequency in the pending scanning strategy by analyzing the data transmission amount of the pending scanning strategy in a historical scanning period to obtain a target scanning frequency; adjusting the pending scanning strategy by using the target scanning range, the scanning start angle and the scanning end angle, and the target scanning frequency to obtain the target scanning strategy; Step 2: performing pointing correction based on the scanning spot result, and establishing a target communication link; Step 3: monitoring a data communication process of the target satellite based on the target communication link in real time, and adjusting correspondingly when there is a communication danger; The adjustment comprises: collecting a current data transmission process of the target satellite based on the target communication link in real time by using a set collection tool to obtain first transmission status data; preprocessing the first transmission status data to obtain second transmission status data; obtaining a first spot offset and a first signal strength change amount according to pointing change data in the second transmission status data; if the first spot offset or the first signal strength change amount exceeds a corresponding set change threshold, determining that the current pointing needs to be adjusted; inputting the first spot offset and the first signal strength change amount into a pre-established pointing adjustment estimation model to obtain a pointing adjustment amount; converting the pointing adjustment amount into a first pointing adjustment instruction to control a corresponding mechanical structure to adjust the current estimated spatial pointing; performing communication danger analysis on communication change data in the second transmission status data, and if it is determined that there is a current communication danger, performing timely repair.

2. The method according to claim 1, wherein, The satellite antenna is scanned according to a target scanning strategy based on the satellite parameters of the target satellite, and a scanning spot result is obtained, including: acquiring first satellite parameters of the target satellite at a current time; adjusting and analyzing a to-be-determined satellite pointing vector obtained by analyzing the first satellite parameters to obtain an estimated spatial pointing; setting a scanning strategy according to current application requirements to obtain a target scanning strategy; based on the target scanning strategy and the estimated spatial pointing, starting a set scanning tool to scan a scanning area to obtain a scanning spot result.

3. The method according to claim 2, wherein, adjusting and analyzing a to-be-determined satellite pointing vector obtained by analyzing the first satellite parameters to obtain an estimated spatial pointing, including: acquiring a three-dimensional position coordinate of the target satellite according to a first orbit parameter in the first satellite parameters; converting the three-dimensional position coordinate of the target satellite into a coordinate system corresponding to the target satellite body, and combining with an attitude parameter in the first satellite parameters to calculate a first satellite pointing; acquiring and combining an installation angle of the target antenna corresponding to the target satellite body with the first satellite pointing to obtain a to-be-determined satellite pointing vector of the target antenna corresponding to the target satellite body; converting the to-be-determined satellite pointing vector from a satellite body coordinate system into an inertial coordinate system; acquiring a first sensitivity parameter in a process of collecting real-time motion data of the target satellite; inputting the first sensitivity parameter after data preprocessing into a pre-established pointing error prediction model to obtain a first error amount; adjusting the to-be-determined satellite pointing vector using the first error amount to obtain a target pointing vector; converting the target pointing vector into a geographic coordinate system to obtain an estimated spatial pointing.

4. The method of claim 1, wherein, performing pointing correction based on the scanning spot result and establishing a target communication link, including: immediately triggering a capture signal when a target photoelectric sensor preloaded on the target satellite detects the scanning spot result; a closed-loop control system receives the capture signal and acquires spot position information based on the scanning spot result; based on the spot position information, acquiring a first deviation of a vector of the target pointing vector and an ideal laser incidence direction, and correspondingly generating a direction adjustment signal; immediately triggering a pointing correction signal after the current target satellite receives and responds to the direction adjustment signal and controls the corresponding mechanical structure to adjust the current estimated spatial pointing to the ideal laser incidence direction; after the laser communication module receives the pointing correction signal, immediately establishing a laser communication link and outputting as a target communication link.

5. The method of claim 1, wherein, performing communication risk analysis on the communication change data in the second transmission condition data, if it is judged that the current communication is dangerous, timely repair is performed, including: comparing the communication change data with a set communication change threshold, marking the communication change data greater than the set communication change threshold as abnormal data; marking the communication change data less than the set communication change threshold and having a first data difference with the set communication change threshold less than a set data difference as possible abnormal data; marking the communication change data less than the set communication change threshold and having a first data difference with the set communication change threshold less than a set data difference as normal data; According to the marking of the current communication change data, a communication danger coefficient of the current target satellite is determined; According to the obtained communication danger coefficient, a communication danger level of the current target satellite is determined; With the communication danger level as a matching condition, a first possible failure cause is obtained from a set level-failure mapping table; A first detection scheme corresponding to the first possible failure cause is extracted for immediate detection, and a first detection result is generated; According to the first detection result, a target failure cause is determined; With the target failure cause as a matching condition, a corresponding repair scheme is matched from a set failure-repair scheme table for timely repair.

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