An adaptive tuning system for a marine short wave communication antenna

Abstract

The application provides a kind of adaptive tuning system of short wave communication antenna of ship, belong to data processing field, the method includes: obtaining the capacitance, inductance of short wave communication antenna under current time and the target frequency set, the capacitance and inductance before and after tuning short wave communication antenna each time, and the target frequency set before each tuning, obtain the initial capacitance and initial inductance of short wave communication antenna, adjust the initial capacitance and initial inductance once, obtain the final voltage standing wave ratio when first adjustment and second adjustment, and the first final voltage standing wave ratio when third and fourth adjustment, judge whether to end tuning, if not end tuning, then constantly obtain the final voltage standing wave ratio of new adjustment time, complete tuning.The application aims to solve the problem that the tuning efficiency may be low when using gradient descent algorithm to tune short wave communication antenna.

Description

Technical Field

[0001] This invention belongs to the field of data processing, and specifically relates to an adaptive tuning system for a marine shortwave communication antenna. Background Technology

[0002] With the development of modern communication technology, adaptive tuning systems for marine shortwave communication antennas have emerged, and their background and significance are crucial. In ocean voyages, shortwave communication is a key means of exceeding line-of-sight and ensuring communication with shore-based and other vessels, especially when satellite communication fails, serving as a last lifeline. However, a ship itself is an extremely complex and dynamically changing electromagnetic environment. The antenna impedance fluctuates drastically with course, load, sea state, and frequency changes, leading to inefficiency, cumbersome operation, and potential damage to transmitting equipment using traditional tuning methods. Adaptive tuning systems completely solve this problem by monitoring antenna status in real time and rapidly adjusting the matching network. It ensures that the communication link remains in optimal condition under any environment, greatly improving communication reliability, efficiency, and equipment safety. It represents a leap from a "skill" relying on human experience to a fully automated, intelligent "engineering" system, providing core technological support for ensuring modern maritime safety and efficient operation.

[0003] Currently, when using the gradient descent algorithm for adaptive tuning of shortwave communication antennas, it is necessary to pre-set the step size of the parameter to be adjusted for each adjustment. However, if the step size is set too large, it may directly skip the optimal solution, leading to instability in the optimization process; if the step size is set too small, it will result in low optimization efficiency or even get stuck in local optima. Therefore, the adaptive tuning effect of shortwave communication antennas using the gradient descent algorithm may be poor. Summary of the Invention

[0004] To address the issue of potentially poor tuning performance when using the gradient descent algorithm for adaptive tuning of shortwave communication antennas, this invention proposes an adaptive tuning system for marine shortwave communication antennas.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: A data acquisition system: acquiring the capacitance, inductance, and target frequency of the shortwave communication antenna at the current moment; the capacitance and inductance before and after each tuning of the shortwave communication antenna; and the target frequency set before each tuning of the shortwave communication antenna; An initial capacitance and initial inductance setting system: comparing the capacitance, inductance, and target frequency of the shortwave communication antenna at the current moment with the capacitance, inductance, and target frequency before each tuning of the shortwave communication antenna; obtaining the initial capacitance and initial inductance of the shortwave communication antenna based on the capacitance and inductance at the end of each tuning of the shortwave communication antenna; and determining whether tuning has ended; A tuning system: if tuning has not ended... The tuning process involves adjusting the initial capacitance and inductance once. Based on the voltage standing wave ratio (VSWR) of the first adjustment and the first adjustment, it is determined whether the initial capacitance and inductance of the shortwave communication antenna should be readjusted to obtain the final VSWR of the first adjustment. This process is repeated to obtain the final VSWR of the second adjustment, and the first-terminal VSWRs of the third and fourth adjustments. Based on the final VSWRs of the first adjustment and the two adjustments, the two first-terminal VSWRs, and the capacitance and inductance values ​​corresponding to each VSWR, the final VSWR of the third adjustment is obtained. It is then determined whether to end the tuning process. If the tuning process is not ended, a new final VSWR is obtained to complete the tuning.

[0006] Further, the specific steps for obtaining the initial capacitance and inductance of the shortwave communication antenna and determining whether to end tuning are as follows: The capacitance, inductance, and target power of the shortwave communication antenna are respectively used as data in three dimensions within the three-dimensional data; the three-dimensional data of the shortwave communication antenna at the current moment and the three-dimensional data of the shortwave communication antenna before each tuning are obtained; fuzzy matching is performed between the three-dimensional data of the shortwave communication antenna at the current moment and the three-dimensional data of the shortwave communication antenna before each tuning to obtain the matching degree between the three-dimensional data of the shortwave communication antenna before each tuning and the three-dimensional data of the shortwave communication antenna at the current moment; the tuning order value corresponding to the three-dimensional data with the largest matching degree with the three-dimensional data of the shortwave communication antenna at the current moment is recorded as the suspected reference order value; the capacitance and inductance values ​​of the shortwave communication antenna at the current moment are set as the capacitance and inductance values ​​of the shortwave communication antenna when tuning ends under the suspected reference order value, and the voltage standing wave ratio (VSWR) of the shortwave communication antenna after this adjustment is obtained and recorded as the historical data reliability; if the historical data reliability is less than a preset safety threshold... If the historical data reliability is greater than or equal to the preset safety threshold, then the tuning process ends; Less than the preset danger threshold If the historical data reliability corresponds to the capacitance and inductance values, these will be recorded as the initial capacitance and inductance values ​​of the shortwave communication antenna; if the historical data reliability is greater than or equal to the danger threshold... Then the initial capacitance and initial inductance values ​​of the shortwave communication antenna are reacquired.

[0007] Further, the specific steps for obtaining the final voltage standing wave ratio (VSWR) during the first adjustment are as follows: Obtain the reactance value of the shortwave communication antenna under the initial capacitance and inductance values, and record it as the initial reactance value of the shortwave communication antenna; if the initial reactance value of the shortwave communication antenna is greater than 0, then during tuning, decrease the inductance value and increase the capacitance value; if the initial reactance value of the shortwave communication antenna is less than 0, then during tuning, increase the inductance value and decrease the capacitance value; the initial step size of the preset capacitance value is... Pifat, the initial step size of the inductance value is Microhenries; the voltage standing wave ratio (VSWR) of the shortwave communication antenna under initial capacitance and initial inductance values ​​is denoted as the first... The final voltage standing wave ratio at the 0th adjustment; the preset capacitor step size and inductor step size are used as the final capacitor step size and final inductor step size at the 0th adjustment, respectively; after obtaining the 0th adjustment... After the final voltage standing wave ratio at the second adjustment, with the first Based on the final voltage standing wave ratio (VSWR) at the time of the adjustment, the capacitance and inductance values ​​corresponding to the first adjustment are respectively used in the second... The final inductance step size and the final capacitance step size are combined during the second adjustment to complete one adjustment. The voltage standing wave ratio after this adjustment is denoted as the [number of adjustments]. The first voltage standing wave ratio during the adjustment; if the first adjustment The final voltage standing wave ratio at the second adjustment is greater than that at the first. The first voltage standing wave ratio during the second adjustment will then be the first... The voltage standing wave ratio at the first adjustment is denoted as the [number]. The final voltage standing wave ratio at the first adjustment; if the first adjustment The final voltage standing wave ratio at the time of the adjustment is less than or equal to that of the first adjustment. The first voltage standing wave ratio during the second adjustment is then reset to the first... Based on the final voltage standing wave ratio (VSWR) at the time of the adjustment, the capacitance and inductance values ​​corresponding to the first adjustment are respectively used in the second... The final half of the inductor step size and the final half of the capacitor step size are combined to complete one adjustment. The voltage standing wave ratio (VSWR) after this adjustment is denoted as the [number]th adjustment. The second voltage standing wave ratio during the second adjustment; if the first The second voltage standing wave ratio during the second adjustment is less than that of the first. The final voltage standing wave ratio at the time of the adjustment will be the first The second voltage standing wave ratio at the time of the adjustment is denoted as the th The final voltage standing wave ratio at the first adjustment; if the first adjustment The second voltage standing wave ratio during the second adjustment is greater than or equal to the first. The final voltage standing wave ratio at the second adjustment is then reset to the first adjustment. Based on the final voltage standing wave ratio (VSWR) corresponding to the capacitance and inductance values ​​at the time of the first adjustment, it is used in the... The final inductor step size and the final capacitor step size are combined in the second adjustment to complete one adjustment. The voltage standing wave ratio obtained after this adjustment is denoted as the first adjustment. The final voltage standing wave ratio at the first adjustment; repeat the above operation continuously to obtain the first... The final voltage standing wave ratio at the time of adjustment.

[0008] Furthermore, the specific steps for obtaining the final voltage standing wave ratio (VSWR) during the second adjustment and the first final VSWR during the third and fourth adjustments are as follows: After obtaining the final VSWR... After the final voltage standing wave ratio at the second adjustment, the first The final voltage standing wave ratio at the time of the adjustment is considered as the first The final voltage standing wave ratio during the next adjustment will be The capacitance corresponding to the final voltage standing wave ratio at the time of the first adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value after the adjustment is denoted as the first adjustment. The final capacitor step size during the next adjustment; The inductance corresponding to the final voltage standing wave ratio at the time of the adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is denoted as the th adjustment. The final inductance step size during the first adjustment; based on the method for obtaining the final voltage standing wave ratio during the (x+1)th adjustment, the... The final voltage standing wave ratio at the first adjustment; if the first adjustment The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of the adjustment, and the first The final voltage standing wave ratio at the time of the adjustment is less than Then the capacitance and inductance values ​​on the shortwave communication antenna are set to the values ​​of the first... The final voltage standing wave ratio (VSWR) during the second adjustment corresponds to the capacitance and inductance values, completing the tuning of the shortwave communication antenna; if the first... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of adjustment, and the final voltage standing wave ratio at the time of adjustment is greater than or equal to Then the final capacitor step size and the final inductor step size during this adjustment will both be increased. Repeat the above steps to obtain the new [number]th [unit]. The final voltage standing wave ratio at the time of the second adjustment, if the new first adjustment The final voltage standing wave ratio at the second adjustment is greater than that at the first. The final voltage standing wave ratio at the time of the adjustment will be the first The capacitance and inductance values ​​corresponding to the voltage standing wave ratio during the first adjustment are used as the capacitance and inductance values ​​of the shortwave communication antenna to complete the tuning of the shortwave communication antenna; if the new first adjustment is used... The voltage standing wave ratio during the second adjustment is less than that during the third adjustment. The voltage standing wave ratio at the second adjustment will then be the new first adjustment. The capacitance and inductance values ​​corresponding to the voltage standing wave ratio at the time of the adjustment are considered as the first... The capacitance and inductance values ​​at the time of the second adjustment are re-acquired. Next and first The final voltage standing wave ratio at the first adjustment; according to the first The method for obtaining the final voltage standing wave ratio during the first adjustment is based on the method for obtaining the final voltage standing wave ratio during the second adjustment. Based on the capacitance and inductance corresponding to the final voltage standing wave ratio during the first adjustment, the first final voltage standing wave ratio during the third and fourth adjustments is obtained.

[0009] Furthermore, the specific steps for obtaining the first final voltage standing wave ratio during the third and fourth adjustments are as follows: [The text abruptly ends here, likely due to an incomplete sentence or a formatting error.] The final voltage standing wave ratio at the time of the adjustment is considered as the first The final voltage standing wave ratio during the next adjustment will be The capacitance corresponding to the final voltage standing wave ratio at the time of the first adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value at the time of the adjustment is considered as the first... The final capacitor step size during the next adjustment; The inductance corresponding to the final voltage standing wave ratio at the time of the adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is considered as the first... The final inductance step size during the second adjustment; based on the first... The method for obtaining the final voltage standing wave ratio during the second adjustment is to obtain the first... A voltage standing wave ratio that meets the conditions during the second adjustment is denoted as the th adjustment. The first final voltage standing wave ratio during the second adjustment, followed by the second... The first final voltage standing wave ratio during the second adjustment is considered as the first... The final voltage standing wave ratio at the second adjustment continues to be obtained. The first final voltage standing wave ratio during the adjustment.

[0010] Further, the step of obtaining the final voltage standing wave ratio (VSWR) at the third adjustment is as follows: First, based on the final VSWR before adjustment and after two adjustments, the two obtained first-stage VSWRs, and the capacitance and inductance values ​​corresponding to each VSWR, the final VSWR at the third adjustment is obtained. The probability that the two step sizes will continue to shorten during the next adjustment; a preset probability threshold. If for the first The possibility that the two step sizes will continue to shorten during this adjustment. Then the first The voltage standing wave ratio at the first final stage during the adjustment is denoted as the first adjustment. The final voltage standing wave ratio at the next adjustment; if Then take the first Based on the final voltage standing wave ratio corresponding to the capacitance and inductance at the time of the adjustment, the first adjustment will be... The final capacitor step size and the final inductance step size are both halved during the second adjustment to obtain the new first step size. The first terminal voltage standing wave ratio at the time of the adjustment, the new first The first final voltage standing wave ratio during the second adjustment yields a new ratio for the second... The possibility that the two step sizes will continue to shorten during the second adjustment; judging the new pair of the second... Is the probability that the two step sizes in the next adjustment will continue to shorten greater than the probability threshold? If it is less than or equal to, then the th iteration in this new iteration process will be... The voltage standing wave ratio at the first final stage during the adjustment is denoted as the first adjustment. The final voltage standing wave ratio at the first adjustment; if it is greater than 1, the iteration continues until the 1st adjustment is obtained. The final voltage standing wave ratio at the time of adjustment.

[0011] Furthermore, the obtained result is for the first... The specific formula for calculating the probability of further shortening of the two step sizes during the next adjustment is as follows:

[0012] ;

[0013] ;

[0014] ;

[0015] ;

[0016] ;

[0017] In the formula, Indicates the first The possibility that the two step sizes will continue to shorten during the next adjustment. Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The first-terminal voltage standing wave ratio after the second adjustment. Indicates the first The first-terminal voltage standing wave ratio after the second adjustment. Indicates the first The first initial capacitor step size during the next adjustment. Indicates the first The first initial inductance step size during the next adjustment. This represents the sigmoid function.

[0018] Furthermore, the specific steps for determining whether to end the tuning are as follows: If the first... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of the adjustment, and the first The final voltage standing wave ratio at the time of the adjustment is less than Then the capacitance and inductance values ​​on the shortwave communication antenna are set to the values ​​of the first... The final voltage standing wave ratio (VSWR) during the adjustment corresponds to the capacitance and inductance values, thus completing the tuning of the shortwave communication antenna.

[0019] Furthermore, if the tuning is not terminated, the specific steps for obtaining the final voltage standing wave ratio at the new adjustment point and completing the tuning are as follows: If the first... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. The final voltage standing wave ratio at the time of the second adjustment is greater than that at the time of the third adjustment. The final voltage standing wave ratio during the second adjustment is then set to Increase by 1, continue obtaining the voltage standing wave ratio (VSWR) for the next adjustment, until the shortwave communication antenna tuning is complete; if the first... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of adjustment, and the final voltage standing wave ratio at the time of adjustment is greater than or equal to Then, the final capacitor step size and the final inductor step size in this adjustment are both increased by five times to obtain the new first step size. The final voltage standing wave ratio at the time of the second adjustment, if the new first adjustment The final voltage standing wave ratio at the second adjustment is greater than that at the first. The final voltage standing wave ratio at the time of the adjustment will be the first The capacitance and inductance values ​​corresponding to the voltage standing wave ratio during the first adjustment are used as the capacitance and inductance values ​​of the shortwave communication antenna to complete the tuning of the shortwave communication antenna; if the new first adjustment is used... The voltage standing wave ratio during the second adjustment is less than that during the third adjustment. The voltage standing wave ratio at the second adjustment will then be the new first adjustment. The capacitance and inductance values ​​corresponding to the voltage standing wave ratio at the time of the adjustment are considered as the first... The capacitance and inductance values ​​are adjusted each time, and the voltage standing wave ratio is continuously obtained for the next adjustment until the tuning of the shortwave communication antenna is completed.

[0020] The adaptive tuning system for a marine shortwave communication antenna provided by this invention has the following advantages: When adaptively tuning a shortwave communication antenna using the gradient descent algorithm, this invention first sets a relatively large step size to adjust the capacitance and inductance values ​​of the shortwave communication antenna. This solves the problem that if the step size is set too small when adaptively tuning a shortwave communication antenna using the gradient descent algorithm, the optimization time may be too long, resulting in low optimization efficiency. Then, based on adjusting the capacitance and inductance values ​​of the shortwave communication antenna, the voltage standing wave ratio (VSWR) should gradually decrease, and as the adjusted capacitance and inductance values ​​of the shortwave communication antenna become closer to the voltage standing wave ratio (VSWR), the voltage standing wave ratio (VSWR) should gradually decrease. When approaching the optimal value, the rate of change of the voltage standing wave ratio (VSWR) should gradually decrease as the capacitance and inductance values ​​of the shortwave communication antenna are continuously adjusted. Based on the change of VSWR when adjusting the capacitance and inductance values ​​of the shortwave communication antenna, it is determined whether the step size should be reduced after each adjustment of the capacitance and inductance values. This solves the problem that if the step size is set too large when using the gradient descent algorithm to tune the shortwave communication antenna, the optimal solution may be missed, resulting in low tuning efficiency. This invention ultimately solves the problem that if the step size is set inappropriately when tuning shortwave communication using the gradient descent algorithm, the optimization efficiency or tuning efficiency may be low. Attached Figure Description

[0021] To more clearly illustrate the embodiments and design schemes of the present invention, the accompanying drawings required for this embodiment will be briefly described below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart of an adaptive tuning system for a marine shortwave communication antenna according to an embodiment of the present invention. Detailed Implementation

[0023] To enable those skilled in the art to better understand and implement the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] Example 1: This invention provides an adaptive tuning system for a marine shortwave communication antenna, specifically as follows: Figure 1 As shown, it includes: Step S001: Obtain the capacitance, inductance and target frequency of the shortwave communication antenna at the current moment, the capacitance and inductance before and after each tuning of the shortwave communication antenna, and the target frequency set before each tuning of the shortwave communication antenna.

[0025] Specifically, the system uses equipment on board the ship to obtain the capacitance, inductance, and target frequency of the shortwave communication antenna at the current moment, as well as the capacitance, inductance, and target frequency of the shortwave communication antenna before each historical tuning of the antenna, and the capacitance and inductance of the antenna at the end of tuning. In this embodiment, all shortwave communication antennas are the same antenna on the same ship.

[0026] Thus, we obtain the capacitance, inductance, and target frequency of the shortwave communication antenna at the current moment, as well as the capacitance and inductance of the shortwave communication antenna before and after each tuning in history, and the target frequency set before each tuning.

[0027] Step S002: Compare the capacitance, inductance, and target frequency of the shortwave communication antenna at the current moment with the capacitance, inductance, and target frequency before each tuning of the shortwave communication antenna. Based on the capacitance and inductance at the end of each tuning of the shortwave communication antenna, obtain the initial capacitance and initial inductance of the shortwave communication antenna, and determine whether to end the tuning.

[0028] It should be noted that when adaptively tuning a shortwave communication antenna, the current situation may be quite similar to the situation before several previous tunings. This means that the capacitance and inductance of the shortwave communication antenna at some points in the historical data at the end of tuning may be applicable to the capacitance and inductance of the shortwave communication antenna at the current point. Therefore, when adaptively tuning a shortwave communication antenna, the capacitance, inductance, and target frequency of the shortwave communication antenna at the current point are first compared with the capacitance, inductance, and target frequency of the shortwave communication antenna before each previous tuning in the past to find the most similar record. Then, the capacitance and inductance of the shortwave communication antenna at the end of tuning corresponding to the most similar record are set as the capacitance and capacitance values ​​of the shortwave communication antenna at the current point. Finally, the voltage standing wave ratio (VSWR) is calculated to determine whether the inductance and capacitance values ​​in the historical data can be used as the capacitance and inductance values ​​set at the end of this tuning.

[0029] It should be further explained that if the inductance and capacitance values ​​set when tuning ended in the past cannot be used as the inductance and capacitance values ​​set when tuning ended this time, but the voltage standing wave ratio calculated based on the historical data is appropriate, then the capacitance and inductance values ​​at the end of tuning in the historical data will be used as the initial values. Then, the gradient descent method will be used to adjust the initial inductance and capacitance values ​​to complete the tuning of the shortwave communication antenna.

[0030] It should be further noted that if the voltage standing wave ratio calculated based on historical data is large, then an initial capacitance and inductance value are obtained again according to existing technology, and then the gradient descent method is used to complete the tuning of the shortwave communication antenna.

[0031] Specifically, the capacitance, inductance, and target power of the shortwave communication antenna are used as data in three dimensions within the three-dimensional dataset. Based on the capacitance, inductance, and target power of the shortwave communication antenna at the current moment, a three-dimensional dataset is generated and recorded as the three-dimensional data of the shortwave communication antenna at the current moment.

[0032] Furthermore, based on historical data, the first The capacitance, inductance, and target power of the shortwave communication antenna before the second tuning are used to generate three-dimensional data, which is denoted as the first... Three-dimensional data of the shortwave communication antenna before sub-tuning.

[0033] Furthermore, using existing technology, fuzzy matching is performed between the current three-dimensional data of the shortwave communication antenna and the three-dimensional data of the shortwave communication antenna before each tuning step to obtain the matching degree between the three-dimensional data of the shortwave communication antenna before each tuning step and the three-dimensional data of the shortwave communication antenna at the current moment. The tuning order value corresponding to the three-dimensional data with the highest matching degree to the three-dimensional data of the shortwave communication antenna at the current moment is recorded as the suspected reference order value.

[0034] Furthermore, the capacitance and inductance of the shortwave communication antenna at the current moment are set to the values ​​of the shortwave communication antenna when tuning ends at the suspected reference sequence value. The voltage standing wave ratio (VSWR) of the shortwave communication antenna after this adjustment is obtained and recorded as historical data reliability. That is, if the matching degree between the three-dimensional data of the shortwave communication antenna before all tuning iterations and the three-dimensional data of the shortwave communication antenna at the current moment is the highest, then... If the matching degree between the three-dimensional data of the shortwave communication antenna before the second tuning and the three-dimensional data of the shortwave communication antenna at the current moment is maximized, then the capacitance and inductance values ​​of the shortwave communication antenna at the current moment are set as the values ​​of the first tuning. The capacitance and inductance values ​​of the shortwave communication antenna at the end of each tuning iteration are recorded, and the voltage standing wave ratio (VSWR) calculated after this adjustment is denoted as a historical data reliability. The VSWR is abbreviated as VSWR. If, among the matching degrees between the three-dimensional data of the shortwave communication antenna before all tuning iterations and the current three-dimensional data of the shortwave communication antenna, multiple matching degrees correspond to the maximum value among all matching degrees, then multiple adjusted VSWRs are obtained based on the order of the multiple three-dimensional data corresponding to the maximum matching degree. The minimum value among these multiple adjusted VSWRs is recorded as the historical data reliability.

[0035] Furthermore, if the reliability of historical data is less than the safety threshold... Then the tuning ends. If the reliability of historical data is greater than or equal to the safety threshold... Less than the danger threshold The capacitance and inductance values ​​corresponding to the historical data reliability are then recorded as the initial capacitance and inductance values ​​of the shortwave communication antenna. If there are multiple combinations of capacitance and inductance values ​​corresponding to the historical data reliability, one of these combinations is selected as the initial capacitance and inductance values ​​of the shortwave communication antenna. Each combination contains only one capacitance and inductance value, and both values ​​correspond to the same capacitance and inductance values ​​of the shortwave communication antenna at the end of the same frequency modulation cycle. The preset security threshold in this embodiment... Preset risk threshold This example illustrates the concept; other values ​​can be used in other implementations. A smaller calculated voltage standing wave ratio (VSWR) indicates better tuning of the shortwave communication antenna. Since a shortwave communication antenna has a VSWR for a given combination of capacitance and inductance values, this invention calculates the capacitance and inductance values ​​for each VSWR combination and records them as the capacitance and inductance values ​​corresponding to that VSWR. Because the reliability of historical data is determined by a VSWR, the capacitance and inductance values ​​corresponding to the VSWR that determines the reliability of historical data are used as the capacitance and inductance values ​​corresponding to the reliability of historical data.

[0036] Furthermore, if the reliability of historical data is greater than or equal to the danger threshold... Therefore, the initial capacitance and inductance values ​​of a shortwave communication antenna can be obtained using existing technologies. The general steps for obtaining these initial capacitance and inductance values ​​using existing technologies are as follows: First, the adjustable capacitor and inductor are constructed using a multi-dimensional parameter space, and the data for the adjustable capacitor and inductor are divided into regions according to their proportions. It is important to note that at low frequencies, the antenna's electrical length is shorter, typically exhibiting capacitive impedance, and resonance usually requires inductive compensation, i.e., a larger inductance and a larger capacitance. Conversely, at high frequencies, a smaller inductance and a smaller capacitance are required.

[0037] Then, VSWR sampling and calculation are quickly performed at the center point of each region. Considering that the VSWR value at the optimal solution should be the minimum, the calculated VSWR is discarded. The calculation is performed using the two locations with the smallest calculated VSRM values ​​in each region as center points. This yields a combination of capacitance and inductance values, which are then used as the initial capacitance and inductance values. In this embodiment, a preset VSRM threshold is used. This example is used to illustrate the concept; other values ​​can be set in other implementations.

[0038] Furthermore, by setting the capacitance and inductance values ​​of the shortwave communication antenna as the initial capacitance and inductance values ​​of the shortwave communication antenna, a reactance value of the shortwave communication antenna is obtained, which is recorded as the initial reactance value of the shortwave communication antenna.

[0039] Step S003: If tuning is not terminated, the initial capacitor and initial inductor are adjusted once. Based on the voltage standing wave ratio (VSWR) of the adjusted and unadjusted values, it is determined whether the initial capacitor and initial inductor of the shortwave communication antenna should be readjusted to obtain the final VSWR of the first adjustment. The above operation is repeated to obtain the final VSWR of the second adjustment and the first-terminal VSWR of the third and fourth adjustments. Based on the final VSWR of the unadjusted and two adjustments, the two first-terminal VSWRs, and the capacitor and inductor values ​​corresponding to each VSWR, the final VSWR of the third adjustment is obtained. Then it is determined whether tuning should be terminated. If tuning is not terminated, the new final VSWR of the adjustment is obtained, and tuning is completed.

[0040] It should be noted that when using the gradient descent method to tune shortwave communication antennas, a step size needs to be set; that is, the magnitude of the adjustment needs to be set each time the capacitance and inductance values ​​are adjusted. If the step size is set too small or too large, the optimization efficiency may be low. Therefore, this invention first sets a large step size, and then determines whether to shorten the step size based on the change in voltage standing wave ratio (VSWR) during each adjustment. This addresses the problem of poor optimization results caused by an unreasonable step size setting when using the gradient descent method to tune shortwave communication antennas.

[0041] It should be further explained that when tuning the shortwave communication antenna, the direction of adjustment for the initial capacitance and inductance values ​​is first determined based on the antenna's reactance at the initial capacitance and inductance values. Then, the initial capacitance and inductance values ​​are adjusted multiple times to obtain the optimal values. Specifically, the tuning of the shortwave communication antenna is based on its reactance to determine whether to increase or decrease the initial capacitance and inductance.

[0042] It's important to further clarify that, ideally, each adjustment to the capacitance and inductance values ​​should result in a decrease in the calculated voltage standing wave ratio (VSWR), meaning each adjustment should bring the result closer to the overall optimal solution. This is because the difference between each adjustment and the optimal result should narrow. If, after each adjustment, the calculated VSWR is larger than the previous one, it indicates that the optimal solution is highly likely to lie between the previously adjusted and currently adjusted inductance and capacitance values. Therefore, if the calculated VSWR increases when adjusting the capacitance and inductance values, the step size should be shortened, and the capacitance and inductance values ​​of the shortwave communication antenna should be readjusted.

[0043] It should be further noted that when tuning a shortwave communication antenna, if the set inductance and capacitance values ​​are close to their optimal values, further adjustments to these values ​​will result in a relatively small change in the voltage standing wave ratio (VSWR). Therefore, by observing the changes in VSWR when adjusting the inductance and capacitance values ​​multiple times within the shortwave communication antenna, it is possible to determine at which adjustment the step size should be shortened to obtain the final VSWR after multiple adjustments.

[0044] It should be further noted that once the inductor or capacitor values ​​are adjusted to the optimal solution, the voltage standing wave ratio (VSWR) will not continue to decrease regardless of further adjustments to the inductor and capacitor. Therefore, based on the VSWR calculated after each adjustment of the inductor or capacitor, it is necessary to determine whether this is the optimal solution and whether tuning should be terminated.

[0045] Specifically, if the initial reactance of the shortwave communication antenna is greater than 0, then during tuning, the inductance value should be decreased and the capacitance value increased; if the initial reactance of the shortwave communication antenna is less than 0, then during tuning, the inductance value should be increased and the capacitance value decreased. In other words, based on the initial reactance value, it is determined whether the capacitance and inductance values ​​should be increased or decreased during tuning. It's important to note that the reactance value cannot be 0 before tuning the shortwave communication antenna.

[0046] Furthermore, the initial step size of the preset capacitance value is: Pifat, the initial step size of the inductance value is Microhenries. In this embodiment, the preset capacitance step size... Preset inductance step size This example is used for illustration; other values ​​may be set in other implementations, and this embodiment is not limited to any particular value.

[0047] Furthermore, after determining the adjustment direction of the capacitance and inductance values ​​of the shortwave communication antenna based on its initial reactance value, the initial capacitance and inductance values ​​are adjusted for the first time according to preset capacitance and inductance step sizes, and the voltage standing wave ratio (VSWR) after this adjustment is obtained and recorded as the first VSWR at the time of the first adjustment. Obtaining the VSWR after each adjustment is a known technique and will not be described in detail in this embodiment.

[0048] Furthermore, the voltage standing wave ratio (VSWR) of the shortwave communication antenna under the initial capacitance and initial inductance values ​​is denoted as the first... The final voltage standing wave ratio (VSWR) during the first adjustment. The preset capacitor and inductor step sizes are used as the final capacitor and inductor step sizes for the 0th adjustment, respectively. And the... The final voltage standing wave ratio (VSWR) during the second adjustment corresponds to the initial capacitance and inductance values, respectively.

[0049] Furthermore, after obtaining the initial capacitance and inductance values ​​of the shortwave communication antenna, the following steps are performed. The following operations: (Steps) As follows: After obtaining the first After the final voltage standing wave ratio at the second adjustment, with the first Based on the final voltage standing wave ratio (VSWR) at the time of the adjustment, the capacitance and inductance values ​​corresponding to the first adjustment are respectively used in the second... The final inductance step size and the final capacitance step size are combined during the second adjustment to complete one adjustment. The voltage standing wave ratio after this adjustment is denoted as the [number of adjustments]. The first voltage standing wave ratio during the next adjustment. Wherein, The initial value is 0.

[0050] Furthermore, if the first The final voltage standing wave ratio at the second adjustment is greater than that at the first. The first voltage standing wave ratio during the second adjustment will then be the first... The voltage standing wave ratio at the first adjustment is denoted as the [number]. The final voltage standing wave ratio at the first adjustment; if the first adjustment The final voltage standing wave ratio at the time of the adjustment is less than or equal to that of the first adjustment. The first voltage standing wave ratio during the second adjustment is then reset to the first... Based on the final voltage standing wave ratio (VSWR) at the time of the adjustment, the capacitance and inductance values ​​corresponding to the first adjustment are respectively used in the second... The final half of the inductor step size and the final half of the capacitor step size are combined to complete one adjustment. The voltage standing wave ratio (VSWR) after this adjustment is denoted as the [number]th adjustment. The second voltage standing wave ratio during the second adjustment; if the first The second voltage standing wave ratio during the second adjustment is less than that of the first. The final voltage standing wave ratio at the time of the adjustment will be the first The second voltage standing wave ratio at the time of the adjustment is denoted as the th The final voltage standing wave ratio at the first adjustment; if the first adjustment The second voltage standing wave ratio during the second adjustment is greater than or equal to the first. The final voltage standing wave ratio at the second adjustment is then reset to the first adjustment. Based on the final voltage standing wave ratio (VSWR) corresponding to the capacitance and inductance values ​​at the time of the first adjustment, it is used in the... The final inductor step size and the final capacitor step size are combined in the second adjustment to complete one adjustment. The voltage standing wave ratio obtained after this adjustment is denoted as the first adjustment. The final voltage standing wave ratio at the time of adjustment.

[0051] If the first The third voltage standing wave ratio during the second adjustment is less than the first. The final voltage standing wave ratio at the time of the adjustment will be the first The third voltage standing wave ratio at the time of the first adjustment is denoted as the final voltage standing wave ratio at the (x+1)th adjustment; if the... The third voltage standing wave ratio during the second adjustment is greater than or equal to the first. The final voltage standing wave ratio at the second adjustment is then reset to the first adjustment. Based on the final voltage standing wave ratio (VSWR) corresponding to the capacitance and inductance values ​​at the time of the first adjustment, it is used in the... In the second adjustment, one-eighth of the final inductance step size and one-eighth of the final capacitance step size are combined to complete one adjustment. The voltage standing wave ratio obtained after this adjustment is denoted as the first adjustment. The third voltage standing wave ratio during the second adjustment is obtained by continuously performing the above operation. The final voltage standing wave ratio at the time of adjustment.

[0052] Furthermore, after obtaining the first After the final voltage standing wave ratio during the second adjustment, proceed to the next step. ,step The following is a list of items: The first... The final voltage standing wave ratio at the time of the adjustment is considered as the first The final voltage standing wave ratio during the next adjustment will be The capacitance corresponding to the final voltage standing wave ratio at the time of the first adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value after the adjustment is denoted as the first adjustment. The final capacitor step size during the next adjustment; The inductance corresponding to the final voltage standing wave ratio at the time of the adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is denoted as the th adjustment. The final inductance step size during the first adjustment; based on the method for obtaining the final voltage standing wave ratio during the (x+1)th adjustment, the... The final voltage standing wave ratio at the time of adjustment.

[0053] Furthermore, when obtaining the final voltage standing wave ratio at each adjustment, if the first... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of the adjustment, and the first The final voltage standing wave ratio at the time of the adjustment is less than Then the capacitance and inductance values ​​on the shortwave communication antenna are set to the values ​​of the first... The final voltage standing wave ratio (VSWR) during the adjustment corresponds to the capacitance and inductance values, thus completing the tuning of the shortwave communication antenna.

[0054] Furthermore, if the first The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of adjustment, and the final voltage standing wave ratio at the time of adjustment is greater than or equal to Then skip to step 1 .

[0055] Furthermore, the first The final voltage standing wave ratio at the time of the adjustment is considered as the first The final voltage standing wave ratio during the next adjustment will be The capacitance corresponding to the final voltage standing wave ratio at the time of the first adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value at the time of the adjustment is considered as the first... The final capacitor step size during the next adjustment; The inductance corresponding to the final voltage standing wave ratio at the time of the adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is considered as the first... The final inductance step size during the second adjustment; based on the first... The method for obtaining the final voltage standing wave ratio during the second adjustment is to obtain the first... A voltage standing wave ratio that meets the iteration condition during the adjustment is denoted as the th adjustment. The first final voltage standing wave ratio during the second adjustment, followed by the second... The first final voltage standing wave ratio during the second adjustment is considered as the first... The final voltage standing wave ratio at the second adjustment continues to be obtained. The first final voltage standing wave ratio during the adjustment.

[0056] Furthermore, when obtaining the final voltage standing wave ratio at each adjustment, if the first... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. The final voltage standing wave ratio at the first adjustment and the first The first final voltage standing wave ratio during the second adjustment, and the second The final voltage standing wave ratio at the time of the adjustment is less than Then the capacitance and inductance values ​​on the shortwave communication antenna are set to the values ​​of the first... The final voltage standing wave ratio (VSWR) during the adjustment corresponds to the capacitance and inductance values, thus completing the tuning of the shortwave communication antenna.

[0057] Furthermore, when obtaining the first final voltage standing wave ratio at each adjustment, if the first... The voltage standing wave ratio at the first final stage of the adjustment is less than that at the second adjustment. The final voltage standing wave ratio at the first adjustment and the first The first final voltage standing wave ratio during the second adjustment, and the second The voltage standing wave ratio at the first final stage of the adjustment is less than Then the capacitance and inductance values ​​on the shortwave communication antenna are set to the values ​​of the first... The capacitance and inductance values ​​corresponding to the first final voltage standing wave ratio during the second adjustment complete the tuning of the shortwave communication antenna. Among these, when only the first... The first terminal voltage standing wave ratio (VSWR) is used during the adjustment, and if there is no final VSWR, the first terminal VSWR is used instead of the final VSWR.

[0058] Furthermore, after obtaining the first sequence Second and third The final voltage standing wave ratio at the first adjustment, and the first sequence After the first final voltage standing wave ratio during the adjustment, proceed with the following steps. .

[0059] Among them, steps As follows: First, The capacitance corresponding to the final voltage standing wave ratio at the time of the first adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value after the adjustment is denoted as the first adjustment. The final capacitor step size during the next adjustment; The inductance corresponding to the final voltage standing wave ratio at the time of the adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is denoted as the th adjustment. The final inductance step size during the next adjustment.

[0060] After that, The capacitance corresponding to the final voltage standing wave ratio at the time of the first adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value after the adjustment is denoted as the first adjustment. The first initial capacitance step size during the next adjustment; The inductance corresponding to the final voltage standing wave ratio at the time of the adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is denoted as the th adjustment. The first initial inductance step size during the next adjustment.

[0061] Furthermore, The capacitance corresponding to the first final voltage standing wave ratio during the second adjustment minus the first... The absolute value of the difference between the final voltage standing wave ratio and the capacitance value after the adjustment is denoted as the first adjustment. The first initial capacitance step size during the next adjustment; The inductance corresponding to the first final voltage standing wave ratio during the second adjustment minus the first... The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is denoted as the th adjustment. The first initial inductance step size during the next adjustment.

[0062] Furthermore, The capacitance corresponding to the first final voltage standing wave ratio during the second adjustment minus the first... The absolute value of the difference between the capacitance and the first final voltage standing wave ratio at the time of adjustment is denoted as the first adjustment. The first initial capacitance step size during the next adjustment; The inductance corresponding to the first final voltage standing wave ratio during the second adjustment minus the first... The absolute value of the difference between the inductance and the first voltage standing wave ratio at the time of the adjustment is denoted as the first adjustment. The first initial inductance step size during the next adjustment.

[0063] Determine whether it is correct for the first The specific steps for correcting the two step sizes during this adjustment are as follows:

[0064] ;

[0065] ;

[0066] ;

[0067] ;

[0068] ;

[0069] In the formula, Indicates the first The possibility that the two step sizes will continue to shorten during the next adjustment. Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The first-terminal voltage standing wave ratio after the second adjustment. Indicates the first The first-terminal voltage standing wave ratio after the second adjustment. Indicates the first The first initial capacitor step size during the next adjustment. Indicates the first The first initial inductance step size during the next adjustment. This represents the sigmoid function, which is used in this embodiment for normalization.

[0070] It should be noted that, The larger the value, the better the capacitance and inductance values ​​are adjusted. After the adjustment, the voltage standing wave ratio (VSWR) experienced a significant decrease. The smaller the value, the better the capacitance and inductance parameters are adjusted. After the adjustment, the voltage standing wave ratio decreased only slightly; The larger the value, the smaller the change in voltage standing wave ratio with the step size. This further indicates that the capacitance and inductance values ​​set on the shortwave communication antenna are closer to the differences between the optimal capacitance and inductance values. At this time, the step size should be reduced. The larger the value, the smaller the change in voltage standing wave ratio with the step size. To improve optimization efficiency and address the issue of potentially exceeding the optimal capacitance and inductance values ​​due to an excessively large step size, the capacitance and inductance values ​​of the shortwave communication antenna are recalculated. The greater the likelihood of this adjustment, the higher the probability.

[0071] Furthermore, a preset probability threshold is established. ,like Then the first The voltage standing wave ratio at the first final stage during the adjustment is denoted as the first adjustment. The final voltage standing wave ratio during the second adjustment, if Then take the first Based on the final voltage standing wave ratio corresponding to the capacitance and inductance at the time of the adjustment, the first adjustment will be... The final capacitor step size and the final inductor step size are both halved during the next adjustment, and the steps are repeated continuously. The operation to obtain the new first The first terminal voltage standing wave ratio at the time of the adjustment, the new first The first final voltage standing wave ratio during the adjustment, and then the steps are repeated. , to obtain a new pair of the first The possibility of further shortening of the two step sizes during the second adjustment is used to determine the new... Is the probability that the two step sizes in the next adjustment will continue to shorten greater than the probability threshold? If it is less than or equal to, then the th iteration in this new iteration process will be... The voltage standing wave ratio at the first final stage during the adjustment is denoted as the first adjustment. The final voltage standing wave ratio at the first adjustment; if it is greater than 1, the iteration continues until the 1st adjustment is obtained. The final voltage standing wave ratio during the next adjustment. In this embodiment, the preset probability threshold... This example is used to illustrate the concept; other values ​​can be set in other implementations.

[0072] Furthermore, if the first The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. +1st time and the first The final voltage standing wave ratio at the time of the adjustment, and the first The final voltage standing wave ratio at the time of the adjustment is less than Then the capacitance and inductance values ​​on the shortwave communication antenna are set to the values ​​of the first... The final voltage standing wave ratio (VSWR) during the adjustment corresponds to the capacitance and inductance values, thus completing the tuning of the shortwave communication antenna.

[0073] Furthermore, if the first The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. The final voltage standing wave ratio at the time of the second adjustment is greater than that at the time of the third adjustment. The final voltage standing wave ratio during the second adjustment is then set to Increment the value by 1, then repeat the steps. Continue to obtain the voltage standing wave ratio for the next adjustment until the tuning of the shortwave communication antenna is completed.

[0074] It should be noted that when using the gradient descent algorithm for adaptive tuning of shortwave communication antennas, local optima may occur, i.e., the optimal capacitance for the first frequency modulation may be 100. The initial capacitor value was set to 10. The step size is 5 A local optimum is 60. This means that, under the aforementioned conditions, tuning the shortwave communication antenna is highly likely to result in a local optimum. A characteristic of a local optimum is that the calculated voltage standing wave ratio (VSWR) under this optimum is still greater than a preset optimal threshold. Therefore, if the calculated VSWR under the optimum solution is still greater than the optimal threshold, an escape operation is performed.

[0075] It should be further explained that when performing the escape operation, the capacitance or inductance value is adjusted in multiple steps, and then the gradient descent method is used again to obtain the optimal solution.

[0076] Furthermore, if the first The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of adjustment, and the final voltage standing wave ratio at the time of adjustment is greater than or equal to Then proceed with the steps. Operation, including steps As follows: If the first The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of adjustment, and the final voltage standing wave ratio at the time of adjustment is greater than or equal to Then the final capacitor step size and the final inductor step size during this adjustment will both be increased. Repeat the above steps to obtain the new [number]th [unit]. The final voltage standing wave ratio at the time of the second adjustment, if the new first adjustment The final voltage standing wave ratio at the second adjustment is greater than that at the first. The final voltage standing wave ratio at the time of the adjustment will be the first The capacitance and inductance values ​​corresponding to the voltage standing wave ratio (VSWR) during the first adjustment are used as the capacitance and inductance values ​​of the shortwave communication antenna to complete the tuning of the shortwave communication antenna. Among these, the new first... The capacitance value corresponding to the final voltage standing wave ratio at the first adjustment and the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value at the time of the adjustment is the value of the first adjustment. The final capacitor step size during the next adjustment The multiple. In this embodiment, the preset multiple threshold is... This example is used for illustration; other values ​​may be set in other implementations, and this embodiment is not limited to any particular value.

[0077] If the new first The voltage standing wave ratio during the second adjustment is less than that during the third adjustment. The voltage standing wave ratio at the second adjustment will then be the new first adjustment. The capacitance and inductance values ​​corresponding to the voltage standing wave ratio at the time of the adjustment are considered as the first... By repeatedly adjusting the capacitance and inductance values ​​during each adjustment, the above steps are continuously repeated to complete the tuning of the shortwave communication antenna.

[0078] This concludes the embodiment.

Claims

1. An adaptive tuning system for a marine shortwave communication antenna, characterized in that, include: Data Acquisition System: Acquires the capacitance, inductance, and target frequency of the shortwave communication antenna at the current moment; the capacitance and inductance before and after each tuning of the shortwave communication antenna; and the target frequency set before each tuning. Initial Capacitance and Inductance Setting System: Compares the current capacitance, inductance, and target frequency of the shortwave communication antenna with those before each tuning; based on the capacitance and inductance at the end of each tuning, obtains the initial capacitance and inductance of the shortwave communication antenna and determines... The specific steps for determining whether to end tuning, based on the initial capacitance and inductance of the shortwave communication antenna, are as follows: The capacitance, inductance, and target power of the shortwave communication antenna are used as data in three dimensions of the three-dimensional data set; the three-dimensional data of the shortwave communication antenna at the current moment and the three-dimensional data of the shortwave communication antenna before each tuning are obtained; fuzzy matching is performed between the three-dimensional data of the shortwave communication antenna at the current moment and the three-dimensional data of the shortwave communication antenna before each tuning to obtain the matching degree between the three-dimensional data of the shortwave communication antenna before each tuning and the three-dimensional data of the shortwave communication antenna at the current moment. The tuning order value corresponding to the three-dimensional data with the highest matching degree to the current shortwave communication antenna's three-dimensional data is recorded as the suspected reference order value. The capacitance and inductance values ​​of the shortwave communication antenna at the current moment are set to the capacitance and inductance values ​​of the shortwave communication antenna when tuning ends at the suspected reference order value, and the voltage standing wave ratio (VSWR) of the shortwave communication antenna after this adjustment is obtained and recorded as the historical data reliability. If the historical data reliability is less than a preset safety threshold... If the historical data reliability is greater than or equal to the preset safety threshold, then the tuning process ends; Less than the preset danger threshold Then, the capacitance and inductance values ​​corresponding to the reliability of historical data are recorded as the initial capacitance and initial inductance values ​​of the shortwave communication antenna. If the reliability of historical data is greater than or equal to the danger threshold If the initial capacitance and inductance values ​​of the shortwave communication antenna are not terminated, the initial capacitance and inductance are adjusted once. Based on the voltage standing wave ratio (VSWR) of the adjusted antenna and the antenna before adjustment, it is determined whether the initial capacitance and inductance of the shortwave communication antenna should be readjusted to obtain the final VSWR of the first adjustment. The specific steps for obtaining the final VSWR of the first adjustment are as follows: Obtain the reactance value of the shortwave communication antenna under the initial capacitance and inductance values, and record it as the initial reactance value of the shortwave communication antenna. If the initial reactance value of the shortwave communication antenna is greater than 0, the inductance value is decreased and the capacitance value is increased during tuning. If the initial reactance value of the shortwave communication antenna is less than 0, the inductance value is increased and the capacitance value is decreased during tuning. The initial step size of the preset capacitance value is Pifat, the initial step size of the inductance value is Microhenries; the voltage standing wave ratio (VSWR) of the shortwave communication antenna under initial capacitance and initial inductance values ​​is denoted as the first... The final voltage standing wave ratio at the 0th adjustment; the preset capacitor step size and inductor step size are used as the final capacitor step size and final inductor step size at the 0th adjustment, respectively; after obtaining the 0th adjustment... After the final voltage standing wave ratio at the second adjustment, with the first Based on the final voltage standing wave ratio (VSWR) at the time of the adjustment, the capacitance and inductance values ​​corresponding to the first adjustment are respectively used in the second... The final inductance step size and the final capacitance step size are combined during the second adjustment to complete one adjustment. The voltage standing wave ratio after this adjustment is denoted as the [number of adjustments]. The first voltage standing wave ratio during the adjustment; if the first adjustment The final voltage standing wave ratio at the second adjustment is greater than that at the first. The first voltage standing wave ratio during the second adjustment will then be the first... The voltage standing wave ratio at the first adjustment is denoted as the [number]. The final voltage standing wave ratio at the first adjustment; if the first adjustment The final voltage standing wave ratio at the time of the adjustment is less than or equal to that of the first adjustment. The first voltage standing wave ratio during the second adjustment is then reset to the first... Based on the final voltage standing wave ratio (VSWR) at the time of the adjustment, the capacitance and inductance values ​​corresponding to the first adjustment are respectively used in the second... The final half of the inductor step size and the final half of the capacitor step size are combined to complete one adjustment. The voltage standing wave ratio (VSWR) after this adjustment is denoted as the [number]th adjustment. The second voltage standing wave ratio during the second adjustment; if the first The second voltage standing wave ratio during the second adjustment is less than that of the first. The final voltage standing wave ratio at the time of the adjustment will be the first The second voltage standing wave ratio at the time of the adjustment is denoted as the th The final voltage standing wave ratio at the first adjustment; if the first adjustment The second voltage standing wave ratio during the second adjustment is greater than or equal to the first. The final voltage standing wave ratio at the second adjustment is then reset to the first adjustment. Based on the final voltage standing wave ratio (VSWR) corresponding to the capacitance and inductance values ​​at the time of the first adjustment, it is used in the... The final inductor step size and the final capacitor step size are combined in the second adjustment to complete one adjustment. The voltage standing wave ratio obtained after this adjustment is denoted as the first adjustment. The final voltage standing wave ratio at the first adjustment; repeat the above operation continuously to obtain the first... The final voltage standing wave ratio (VSWR) at the first adjustment; repeat the above operation to obtain the final VSWR at the second adjustment, and the first final VSWR at the third and fourth adjustments; the specific steps for obtaining the final VSWR at the second adjustment and the first final VSWR at the third and fourth adjustments are as follows: after obtaining the final VSWR at the second adjustment, and the first final VSWR at the third and fourth adjustments... After the final voltage standing wave ratio at the second adjustment, the first The final voltage standing wave ratio at the time of the adjustment is considered as the first The final voltage standing wave ratio during the next adjustment will be The capacitance corresponding to the final voltage standing wave ratio at the time of the first adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value after the adjustment is denoted as the first adjustment. The final capacitor step size during the next adjustment; The inductance corresponding to the final voltage standing wave ratio at the time of the adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is denoted as the th adjustment. The final inductance step size during the first adjustment; based on the method for obtaining the final voltage standing wave ratio during the (x+1)th adjustment, the... The final voltage standing wave ratio at the first adjustment; if the first adjustment The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of the adjustment, and the first The final voltage standing wave ratio at the time of the adjustment is less than Then the capacitance and inductance values ​​on the shortwave communication antenna are set to the values ​​of the first... The final voltage standing wave ratio during the adjustment corresponds to the capacitance and inductance values, thus completing the tuning of the shortwave communication antenna. If the first The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of adjustment, and the final voltage standing wave ratio at the time of adjustment is greater than or equal to Then the final capacitor step size and the final inductor step size during this adjustment will both be increased. Repeat the above steps to obtain the new [number]th [unit]. The final voltage standing wave ratio at the time of the second adjustment, if the new first adjustment The final voltage standing wave ratio at the second adjustment is greater than that at the first. The final voltage standing wave ratio at the time of the adjustment will be the first The capacitance and inductance values ​​corresponding to the voltage standing wave ratio during the first adjustment are used as the capacitance and inductance values ​​of the shortwave communication antenna to complete the tuning of the shortwave communication antenna; if the new first adjustment is used... The voltage standing wave ratio during the second adjustment is less than that during the third adjustment. The voltage standing wave ratio at the second adjustment will then be the new first adjustment. The capacitance and inductance values ​​corresponding to the voltage standing wave ratio at the time of the adjustment are considered as the first... The capacitance and inductance values ​​at the time of the second adjustment are re-acquired. Next and first The final voltage standing wave ratio at the first adjustment; according to the first The method for obtaining the final voltage standing wave ratio during the first adjustment is based on the method for obtaining the final voltage standing wave ratio during the second adjustment. Based on the capacitance and inductance corresponding to the final voltage standing wave ratio at the first adjustment, the first final voltage standing wave ratio at the third and fourth adjustments is obtained; the specific steps for obtaining the first final voltage standing wave ratio at the third and fourth adjustments are as follows: [The text abruptly ends here, likely due to an incomplete sentence or a formatting error.] The final voltage standing wave ratio at the time of the adjustment is considered as the first The final voltage standing wave ratio during the next adjustment will be The capacitance corresponding to the final voltage standing wave ratio at the time of the first adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the capacitance value at the time of the adjustment is considered as the first... The final capacitor step size during the next adjustment; The inductance corresponding to the final voltage standing wave ratio at the time of the adjustment minus the first The absolute value of the difference between the final voltage standing wave ratio and the inductance value at the time of the adjustment is considered as the first... The final inductance step size during the second adjustment; based on the first... The method for obtaining the final voltage standing wave ratio during the second adjustment is to obtain the first... A voltage standing wave ratio that meets the conditions during the second adjustment is denoted as the th adjustment. The first final voltage standing wave ratio during the second adjustment, followed by the second... The first final voltage standing wave ratio during the second adjustment is considered as the first... The final voltage standing wave ratio at the second adjustment continues to be obtained. The first final voltage standing wave ratio (VSWR) during the first adjustment; based on the final VSWR before and after two adjustments, the two first final VSWRs, and the capacitance and inductance values ​​corresponding to each VSWR, the final VSWR during the third adjustment is obtained, and then it is determined whether to end the tuning. If the tuning is not ended, a new final VSWR is obtained, and the tuning is completed. The steps for obtaining the final VSWR during the third adjustment are as follows: First, based on the final VSWR before and after two adjustments, the two obtained first final VSWRs, and the capacitance and inductance values ​​corresponding to each VSWR, the final VSWR for the third adjustment is obtained. The possibility that the two step sizes will continue to be shortened during the next adjustment; Preset probability threshold If for the first The possibility that the two step sizes will continue to shorten during this adjustment. Then the first The voltage standing wave ratio at the first final stage during the adjustment is denoted as the first adjustment. The final voltage standing wave ratio at the next adjustment; if Then take the first Based on the final voltage standing wave ratio corresponding to the capacitance and inductance at the time of the adjustment, the first adjustment will be... The final capacitor step size and the final inductance step size are both halved during the second adjustment to obtain the new first step size. The first terminal voltage standing wave ratio at the time of the adjustment, the new first The first final voltage standing wave ratio during the second adjustment yields a new ratio for the second... The possibility that the two step sizes will continue to shorten during the second adjustment; judging the new pair of the second... Is the probability that the two step sizes in the next adjustment will continue to shorten greater than the probability threshold? If it is less than or equal to, then the th iteration in this new iteration process will be... The voltage standing wave ratio at the first final stage during the adjustment is denoted as the first adjustment. The final voltage standing wave ratio at the time of the adjustment; If it is greater than , continue iterating until the th iteration is obtained. The final voltage standing wave ratio at the first adjustment; the obtained for the first adjustment The specific formula for calculating the probability of further shortening of the two step sizes during the next adjustment is as follows: ； ； ； ； ； In the formula, Indicates the first The possibility that the two step sizes will continue to shorten during the next adjustment. Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The final voltage standing wave ratio after the second adjustment Indicates the first The first-terminal voltage standing wave ratio after the second adjustment. Indicates the first The first-terminal voltage standing wave ratio after the second adjustment. Indicates the first The first initial capacitor step size during the next adjustment. Indicates the first The first initial inductance step size during the next adjustment This represents the sigmoid function; the specific steps to determine whether to end the tuning are as follows: If the first... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of the adjustment, and the first The final voltage standing wave ratio at the time of the adjustment is less than Then the capacitance and inductance values ​​on the shortwave communication antenna are set to the values ​​of the first... The capacitance and inductance values ​​corresponding to the final voltage standing wave ratio during the first adjustment are used to complete the tuning of the shortwave communication antenna. If the tuning is not terminated, the specific steps for obtaining the new final voltage standing wave ratio during the second adjustment are as follows: If the first adjustment... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. The final voltage standing wave ratio at the time of the second adjustment is greater than that at the time of the third adjustment. The final voltage standing wave ratio during the second adjustment is then set to Increase by 1, continue obtaining the voltage standing wave ratio (VSWR) for the next adjustment, until the shortwave communication antenna tuning is complete; if the first... The final voltage standing wave ratio at the second adjustment is less than that at the third adjustment. Next and first The final voltage standing wave ratio at the time of adjustment, and the final voltage standing wave ratio at the time of adjustment is greater than or equal to Then, the final capacitor step size and the final inductor step size in this adjustment are both increased by five times to obtain the new first step size. The final voltage standing wave ratio at the time of the second adjustment, if the new first adjustment The final voltage standing wave ratio at the second adjustment is greater than that at the first. The final voltage standing wave ratio at the time of the adjustment will be the first The capacitance and inductance values ​​corresponding to the voltage standing wave ratio during the first adjustment are used as the capacitance and inductance values ​​of the shortwave communication antenna to complete the tuning of the shortwave communication antenna; if the new first adjustment is used... The voltage standing wave ratio during the second adjustment is less than that during the third adjustment. The voltage standing wave ratio at the second adjustment will then be the new first adjustment. The capacitance and inductance values ​​corresponding to the voltage standing wave ratio at the time of the adjustment are considered as the first... The capacitance and inductance values ​​are adjusted each time, and the voltage standing wave ratio is continuously obtained for the next adjustment until the tuning of the shortwave communication antenna is completed.

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