Reliability evaluation method and system for small-scale array antenna considering performance variation

Abstract

The embodiment of the specification provides a small-scale array antenna reliability evaluation method and system considering performance change, wherein the method comprises the following steps: analyzing failure law and characteristics of a transceiving channel of an array antenna; determining all possible states of the array antenna and calculating performances of the array antenna in different states; dividing all possible states of the array antenna into available states and unavailable states according to performances of each state of the array antenna and performance requirements of the array antenna in an application process; calculating a probability function of each available state of the array antenna according to the failure law and characteristics of the array antenna channel, determining probabilities of the array antenna in the available states at different times, adding all the probability functions of the available states to obtain available probabilities of the array antenna at different times, and obtaining a reliability function of the array antenna; and calculating and obtaining an average service life of the array antenna based on the reliability function of the array antenna.

Description

TECHNICAL FIELD

[0001] The present document relates to the field of array antenna technology, in particular to a small-scale array antenna reliability evaluation method and system considering performance change. BACKGROUND

[0002] In the array antenna, the failure of a single TR component only affects the signal radiation of the array element connected thereto, and the channel performance of other TR components and array elements remains unchanged. In addition, a small number of TR component failures have little effect on the overall performance of the array antenna. Therefore, the active array antenna is a typical n out of k voting system, that is, when k normal TR components are working in n TR components of the array antenna, the array antenna can complete the expected function. Assuming that the reliability function of the TR component is R(t), the reliability function of the array antenna is

[0003] (1)

[0004] The average life θ of the system, that is, the mean time to failure (MTTF), is

[0005] (2)

[0006] In actual applications, when the number of failed TR components is less than 10% of the number of TR components in the system, the performance of the array antenna is basically not reduced, that is, k = 90% x n, and the maximum number of failed TR components is fmax = 10% x n.

[0007] In the reliability model, only the number of failed TR components is considered, and the position of the failed TR components is not considered. When the positions of the failed TR components are different, their effects on the performance of the array antenna, especially on the performance of the sidelobe, are different. Therefore, even if the number of failed TR components f < fmax, if the failed TR components are concentrated in a certain area, the performance of the array antenna will deteriorate, and the array antenna will be in an unusable state. Therefore, using the reliability model to evaluate the reliability of the array antenna has the problem of overestimation. Improving the accuracy of array antenna reliability analysis is a problem that needs to be solved at present. SUMMARY

[0008] The purpose of the present application is to provide a small-scale array antenna reliability evaluation method and system considering performance change, which aims to solve the above problems in the prior art.

[0009] The present application provides a small-scale array antenna reliability evaluation method considering performance change, comprising:

[0010] According to the structure, composition and failure characteristics of each part of the array antenna, the failure law and characteristics of the transceiver channel of the array antenna are analyzed, and the failure law and characteristics of the transceiver channel of the array antenna are analyzed, and the failure law and characteristics of the transceiver channel of the array antenna are analyzed.

[0011] According to the scale and structure of the array antenna, all possible states of the array antenna are determined, and performances of the array antenna in different states are calculated, and according to the performances of each state of the array antenna and the performance requirements of the array antenna in the application process, all possible states of the array antenna are divided into available states and unavailable states;

[0012] According to the failure law and characteristics of the array antenna channel, probability functions of each available state of the array antenna are calculated, probabilities of the array antenna in the available state at different times are determined, all the probability functions of the available states are added, and the availability probability of the array antenna at different times is obtained, and the reliability function of the array antenna is obtained;

[0013] Based on the reliability function of the array antenna, the average life of the array antenna is calculated and obtained.

[0014] The application provides a small-scale array antenna reliability evaluation system considering performance changes, comprising:

[0015] The channel failure law module is used for analyzing the failure law and characteristics of the receiving and transmitting channels of the array antenna according to the structure, composition and failure characteristics of each part of the array antenna, and serving as the basis for the state change of the array antenna.

[0016] The antenna performance module is used for determining all possible states of the array antenna according to the scale and structure of the array antenna, and calculating the performances of the array antenna in different states, and dividing all possible states of the array antenna into available states and unavailable states according to the performances of each state of the array antenna and the performance requirements of the array antenna in the application process.

[0017] The array antenna reliability calculation module is used for calculating the probability functions of each available state of the array antenna according to the failure law and characteristics of the array antenna channel, determining the probabilities of the array antenna in the available state at different times, adding all the probability functions of the available states, obtaining the availability probability of the array antenna at different times, and obtaining the reliability function of the array antenna.

[0018] The array antenna average life calculation module is used for calculating and obtaining the average life of the array antenna based on the reliability function of the array antenna.

[0019] The application also provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the computer program is executed by the processor to implement the steps of the small-scale array antenna reliability evaluation method considering performance changes.

[0020] The embodiment of the present application also provides a computer readable storage medium, and the computer readable storage medium stores an information transmission implementation program, and the program is executed by a processor to implement the steps of the small-scale array antenna reliability evaluation method considering performance change.

[0021] By adopting the embodiment of the present application, the existing array antenna reliability analysis method based on the n / k system is analyzed, and the influence of the failure TR component position on the array antenna performance is not considered in the method, so that the array antenna reliability is overestimated. In order to improve the accuracy of the array antenna reliability evaluation, the performance change caused by the TR failure in different positions is considered, and an array antenna reliability analysis process considering performance change is established. Through the failure analysis of the transceiving channel, the array state performance evaluation, the state division, the available state probability calculation, the array antenna reliability calculation and the average life calculation, the performance of the array antenna in each state is accurately calculated, whether the state is available is determined according to the performance threshold, and then the available state or the unavailable state is determined, so as to calculate the reliability of the array antenna. Through the analysis of the performance of the array antenna in each state, the available state of the array antenna is accurately determined, the influence of the failure in different positions and quantities on the array antenna performance is considered, the overestimation problem of the reliability caused by the fact that only the number of failures is used as the basis for judgment is solved, the accuracy of the array antenna reliability evaluation is improved, a theoretical basis is provided for the performance evaluation of the array antenna, and a basis is provided for the support of the phased array radar. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the one or more embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0023] Figure 1 is a flow chart of the small-scale array antenna reliability evaluation method considering performance change of the embodiment of the present application;

[0024] Figure 2 is a detailed processing flow chart of the array antenna reliability evaluation process of the embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the array antenna transceiving channel structure of the embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the array antenna state and performance evaluation process of the embodiment of the present application;

[0027] Figure 5 is a schematic diagram of the array antenna reliability result of the embodiment of the present application;

[0028] Figure 6 is a schematic diagram of a small-scale array antenna reliability evaluation system considering performance changes of an embodiment of the present application;

[0029] Figure 7 is a schematic diagram of an electronic device of an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order for those skilled in the art to better understand the technical solutions in the one or more embodiments of the present specification, the technical solutions in the one or more embodiments of the present specification will be clearly and completely described below in conjunction with the drawings in the one or more embodiments of the present specification. Obviously, the described embodiments are only a part of the embodiments of the present specification, rather than all the embodiments. Based on the one or more embodiments of the present specification, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present document.

[0031] Method embodiments

[0032] According to an embodiment of the present application, a small-scale array antenna reliability evaluation method considering performance changes is provided, Figure 1 is a flowchart of a small-scale array antenna reliability evaluation method considering performance changes of an embodiment of the present application, as Figure 1 shown, the small-scale array antenna reliability evaluation method considering performance changes according to an embodiment of the present application specifically includes:

[0033] Step S101, according to the structure, composition and failure characteristics of each part of the array antenna, the failure law and characteristics of the transceiving channel of the array antenna are analyzed, and are used as the basis for the state change of the array antenna. Specifically includes: determining the failure probability function of the transceiving channel of the array antenna according to formula 1, wherein the failure probability of the transceiving channel is equal to the failure probability of the transceiving component:

[0034] Formula 1;

[0035] Where λ is the failure rate, and t represents time.

[0036] Step S102, according to the size and structure of the array antenna, all possible states of the array antenna are determined, and the performance of the array antenna under different states is calculated, and according to the performance of each state of the array antenna and the performance requirements of the array antenna in the application process, all possible states of the array antenna are divided into available states and unavailable states; Specifically includes: generating all states of the array antenna: for an array antenna with N transceiving channels, the number of failures n =0, 1, …, N, and for each number of failures, the number of corresponding states is , then the number of all states of the array antenna is , record the state set as S={ s i}, wherein s i is the i th state of the array antenna, which contains N 0, 1 values, when s i (j) = 1, indicating that the j th transceiving channel of the array antenna is normal; when s i (j) = 0, indicating that the j th transceiving channel of the array antenna is failed;

[0037] Pattern calculation: for each state s i , according to its state, regenerate its channel signal amplitude A. s i , and calculate the array antenna pattern under the state according to the pattern formula.

[0038] Performance parameter calculation: based on the calculation result of the pattern, according to the definition of each performance parameter, the performance parameter value of the array antenna under different states is calculated.

[0039] Suppose the application requirement threshold of each performance parameter is the maximum side lobe level maxSLL L , the average side lobe level avSLL L , the half-power beam width HPBW L , the first null beam width FNBW L and the directivity coefficient D L .

[0040] For the array antenna under the state s i , if its performance parameters simultaneously satisfy maxSLL si > maxSLL L , avSLL si > avSLL L , HPBW si < HPBW L , FNBW si < FNBW L , D si > D L , the state is a usable state, and if any parameter cannot satisfy the application requirement, the state is an unusable state, wherein the performance parameters and the application requirement threshold are set according to the application scene of the array antenna, the usable state means that the performance of the array antenna under the state meets the application demand, and the array antenna can be normally used; the unusable state means that the performance of the array antenna under the state cannot meet the application demand.

[0041] Step S103, according to the array antenna channel failure rule and characteristics, calculate the array antenna each available state probability function, determine the array antenna in different time under the available state probability, add all available state probability function, obtain the array antenna in different time under the available probability, get the array antenna reliability function;Specifically including: for available state s i , the number of normal transceiver channel in array antenna N n Is:

[0042] Formula 2;

[0043] In this state, the number of fault transceiver channel in array antenna is N f = N-N n ;

[0044] At time t, according to the failure probability function of array antenna transceiver channel, the probability of available state s i Is:

[0045] Formula 3.

[0046] Let the array antenna reliability function be R(t), then:

[0047] Formula 4;

[0048] Where, s i All available states.

[0049] Step S104, based on the array antenna reliability function, calculate the average life of array antenna. Specifically including:

[0050] Based on the array antenna reliability function, calculate the average life of array antenna:

[0051] Formula 5.

[0052] In summary, to improve the reliability analysis accuracy of the array antenna, a reliability evaluation process considering performance changes is established. Through failure analysis of the receiving and transmitting channels, array state performance evaluation, state division, available state probability calculation, array antenna reliability calculation, and average life calculation, the performance of the array antenna in each state is accurately calculated. According to the performance threshold, it is determined whether the state is available, and then the available state or the unavailable state is determined, so as to calculate the reliability of the array antenna. Through the analysis of the performance of each state of the array antenna, the available state of the array antenna is accurately determined, the problem of overestimation of reliability caused by only using the number of failures as the basis for judgment is solved, the accuracy of the reliability evaluation of the array antenna is improved, and a theoretical basis is provided for the performance evaluation of the array antenna and the support of the phased array radar.

[0053] The above technical solutions of the embodiments of the application will be described in detail below with reference to the drawings.

[0054] To improve the reliability analysis accuracy of the array antenna, the performance of the array antenna in each state needs to be accurately calculated, it is determined whether the state is available according to the performance threshold, and then the available state probability function is determined, so as to calculate the reliability of the array antenna and the average life thereof. The steps are as shown in Figure 2 .

[0055] Figure 2 In the array antenna reliability evaluation process shown, the steps include channel failure analysis, array state and performance evaluation, state division, available state probability function calculation, array antenna reliability function calculation, and array antenna average life calculation:

[0056] (1) Channel failure analysis. According to the structure, composition, and failure characteristics of each part of the array antenna, the failure law and characteristics of the basic component of the array antenna, i.e., the receiving and transmitting channel, are analyzed, and serve as the basis for the state change of the array antenna.

[0057] (2) Array state and performance evaluation. According to the size and structure of the array antenna, all possible states of the array antenna are determined, and the performance of the array antenna in different states is calculated.

[0058] (3) State division. According to the performance of each state of the array antenna and the performance requirements of the array antenna in the application process, all possible states of the array antenna are divided into available states and unavailable states. The available state means that the performance of the array antenna in this state meets the application requirements, and the array antenna can be normally used. The unavailable state means that the performance of the array antenna in this state cannot meet the application requirements.

[0059] (4) Available state probability function calculation. According to the channel failure law of the array antenna, combined with the conversion between different states, the probability function of each available state of the array antenna is calculated, and the probability of the array antenna being in the available state at different times is determined.

[0060] (5) Array antenna reliability function calculation, on the basis of array antenna available state probability function calculation, all available state probability functions are added to obtain the array antenna availability probability at different times, and the array antenna reliability function is obtained.

[0061] (6) Array antenna average life calculation, based on reliability function calculation, the array antenna average life is calculated according to formula (2).

[0062] Figure 2 The array antenna reliability evaluation process is shown in the figure. Each working state of the array antenna is evaluated, and whether the state is available is judged according to the performance of the array antenna in the state. The available state of the array antenna is accurately determined. According to the state transition and change process during the operation of the array antenna, the probability function of each available state is calculated, and the array antenna reliability function and average life are calculated. The calculation process can accurately calculate the reliability of the array antenna, and the influence of failure on performance is considered.

[0063] In order to improve the accuracy of array antenna reliability analysis, the performance of each state of the array antenna needs to be accurately calculated, and whether the state is available is determined according to the performance threshold, and then the number of available states or unavailable states is determined, so as to calculate the reliability of the array antenna. The steps are as follows.

[0064] Transmit-receive channel failure analysis:

[0065] The array antenna is composed of a large number of transmit-receive channels, and the structure and function of each transmit-receive channel are the same. The channel is composed of a transmit-receive component and a radiation array element, as shown in Figure 3 .

[0066] Figure 3 In the transmit-receive channel structure shown in the figure, the radiation array element is various types of antennas, and its failure probability is small; the transmit-receive component is an electronic module composed of various radio frequency devices, and its failure probability conforms to the exponential distribution law, that is, its failure probability function is

[0067] (3)

[0068] Where λ is the failure rate.

[0069] For the transmit-receive channel composed of a transmit-receive component and a radiation array element in series, since the failure probability of the radiation array element is small, the failure probability of the transmit-receive channel is equal to the failure probability of the transmit-receive component, so the failure probability function of the transmit-receive channel is formula (3).

[0070] Array state and performance evaluation:

[0071] During the operation of the array antenna, with the failure of different positions and different numbers of transceiver channels, the array antenna appears different states, and its performance also changes. The performance of the array antenna is usually represented by the parameters such as the directivity pattern and the maximum side lobe level, the average side lobe level, the half-power beam width, the first zero-point beam width, and the antenna direction coefficient.

[0072] For the array antenna to be analyzed, it contains a number of channels denoted as N, and the normalized amplitude of each channel signal is A = [Ai], i = 0, 1, …, N-1. Then, the array state of all possible failure channel numbers and positions is traversed, and the maximum side lobe level, the average side lobe level, the half-power beam width, the first zero-point beam width, and the antenna direction coefficient of the array antenna in each state are calculated. The performance of the array antenna in this state is evaluated by its key parameters. The calculation process is shown in Figure 4 .

[0073] Figure 4 The calculation process shown includes three steps of state generation, directivity pattern calculation, and performance parameter calculation:

[0074] (1) State generation, generate all states of the array antenna. For an array antenna with N transceiver channels, the failure number n = 0, 1, …, N, and for each failure number, the corresponding state number is Then the total number of states of the array antenna is , and the state set is S = {s i}, where si is the i-th state of the array antenna, which contains N 0, 1 values, and when s i (j) = 1, it means that the j-th transceiver channel of the array antenna is normal; when s i (j) = 0, it means that the j-th transceiver channel of the array antenna is failed.

[0075] (2) Directivity pattern calculation, for each state s i , according to its state, the channel signal amplitude A.*s i is regenerated, and the directivity pattern of the array antenna in this state is calculated according to the directivity pattern formula.

[0076] (3) Performance parameter calculation, based on the calculation results of the directivity pattern, the performance parameter values of the array antenna in different states are calculated according to the definition of each performance parameter.

[0077] Usable state and unusable state division:

[0078] On the basis of performance evaluation of each state of the array antenna, according to the application requirements of each performance parameter, each state is divided into usable state and unusable state.

[0079] Suppose the application requirement threshold of each performance parameter is the maximum side lobe level maxSLLL , average side lobe level avSLL L , half power beam width HPBW L , first null beam width FNBW L and direction coefficient D L For the array antenna in state s i , if its performance parameters satisfy maxSLLs i > maxSLL L , avSLLs i > avSLL L , HPBWsi<HPBWL, FNBWs i <FNBW L , Ds i >D L , the state is a usable state, if any parameter cannot meet the application requirements, the state is an unusable state. The performance parameters and their thresholds are set according to the application scenarios of the array antenna.

[0080] Usable state probability calculation:

[0081] For the array antenna in a usable state that meets the performance threshold requirements, the probability of the state occurring is calculated according to the number of faulty transceiving channels in the array antenna in the state.

[0082] For the usable state si, the number of normal transceiving channels in the array antenna Nn is

[0083] (4)

[0084] In the state, the number of faulty transceiving channels in the array antenna is Nf = N-Nn.

[0085] At time t, the probability of transceiving channel failure is as shown in equation (3), and the probability of the usable state si occurring is

[0086] (5)

[0087] Array antenna reliability function calculation:

[0088] On the basis of calculating the probabilities of all usable states, the calculation of the array antenna reliability function is performed. The array antenna reliability function is the sum of the probabilities of all usable states. Let the array antenna reliability function be R(t), then

[0089] (6)

[0090] In equation (6), si is all the usable states.

[0091] Array antenna average life calculation:

[0092] Based on the array antenna reliability function, the average life of the array antenna can be calculated, as shown in equation (7).

[0093] (7)

[0094] Simulation experiment:

[0095] Taking the Chebyshev linear array as an example, the existing calculation method and the method of the present application are used to calculate the reliability. The size of the linear array N is set to 20, the element spacing d = 0.5λ, λ is the wavelength of the radiated electromagnetic wave, and the maximum side lobe level SLL = -30dB. After the Dolph-Chebyshev method and the Taylor method are synthesized, the maximum side lobe level (maxSLL), the average side lobe level (avSLL), the half-power beam width (HPBW), the first null beam width (FNBW) and the direction coefficient D of the array antenna under different failure element combinations are calculated.

[0096] Suppose the failure probability of the array antenna is λ = 4.5 × 10-6 / h, then when the existing method is used to analyze the reliability of the array antenna, the maximum number of faults tolerated is 2, the number of normal working transceiver channels k is 18~20, and the array antenna reliability function is

[0097] (8)

[0098] When the method of the present application is used for analysis, suppose the maximum side lobe level threshold SLLL = -21dB when the array antenna is working normally, then the 232=1048576 states of the array antenna are analyzed first, the maximum side lobe level of each state is analyzed, and whether it is a usable state is determined according to the threshold, and finally the number of usable states is determined to be 120. The probability function of each usable state is calculated using equation (5), and the array antenna reliability function is calculated using equation (6). When the reliability of the array antenna is evaluated using the method of the present application and the existing method, the reliability function is as shown in equation (9). When the existing method is used for calculation, the average life of the array antenna is 35203h; when the method of the present application is used for calculation, the average life of the array antenna is 18937h. Figure 5

[0099] Figure 5 ​​As can be seen from the figure, in the existing method for evaluating the process, only the number of fault transceiving channels is considered, and the influence of different positions of the fault is not considered. For the array antenna of the embodiment of the present application with a scale of 20, when the number of fault channels is 1, if the fault position is at the center position of the array, the performance of the array antenna cannot meet the use requirement. For this state, although the number of faults meets the requirement, the performance does not meet the use requirement, and this state is an unusable state. In the reliability evaluation of the existing method, only the number of fault channels is considered, and this state is divided into an available state, which leads to overestimation of the reliability evaluation result. The embodiment of the present application starts from the actual performance of each state, and determines the available state and the unusable state according to whether the performance meets the requirement, so that the reliability evaluation result is more accurate.

[0100] The embodiment of the present application accurately determines the available state according to the performance of the array antenna in each state by traversing and analyzing all states of the array antenna, and then accurately evaluates the reliability of the array antenna, thereby providing a basis for accurate evaluation of the performance of the array antenna and a theoretical basis for support of the phased array radar equipment.

[0101] In the embodiment of the present application, for an array antenna with a scale of N, the number of array antenna states that need to be analyzed and calculated is 2 N As can be seen, the amount of calculation in the reliability evaluation process increases exponentially with the scale of the array antenna. For array antennas of different scales, the number of states that need to be calculated is shown in Table 1.

[0102] Table 1 Number of states for different antenna scales

[0103]

[0104] As can be seen from Table 1, when the scale of the array antenna is greater than 50, the number of states that need to be calculated is more than 1.13e15, and the time consumption of the reliability evaluation process is serious, so the embodiment of the present application is only for small-scale array antennas with a scale less than 50.

[0105] System embodiment

[0106] According to the embodiment of the present application, a small-scale array antenna reliability evaluation system considering performance changes is provided, Figure 6 is a schematic diagram of the small-scale array antenna reliability evaluation system considering performance changes of the embodiment of the present application, as Figure 6 shown, the small-scale array antenna reliability evaluation system considering performance changes according to the embodiment of the present application specifically includes:

[0107] The channel failure law module 60 is used to analyze the failure law and characteristics of the transceiving channels of the array antenna according to the structure, composition and failure characteristics of each part of the array antenna, and serves as the basis for the change of the state of the array antenna.

[0108] an antenna performance module 62, configured to determine all possible states of the array antenna according to the scale and structure of the array antenna, and to calculate the performance of the array antenna in different states, and to divide all possible states of the array antenna into available states and unavailable states according to the performance of each state of the array antenna and the performance requirement of the array antenna in the application process;

[0109] an array antenna reliability calculation module 64, configured to calculate the probability function of each available state of the array antenna according to the failure law and characteristics of the array antenna, to determine the probability of the array antenna being in the available state at different times, to add all the probability functions of the available states to obtain the available probability of the array antenna at different times, and to obtain the reliability function of the array antenna;

[0110] an array antenna average life calculation module 66, configured to calculate the average life of the array antenna based on the reliability function of the array antenna.

[0111] The embodiment of the application is a system embodiment corresponding to the above-mentioned method embodiment, and the specific operation of each module can be understood with reference to the description of the method embodiment, which will not be repeated here.

[0112] Device embodiment one

[0113] The embodiment of the application provides an electronic device, such as Figure 7 as shown, comprising a memory 70, a processor 72, and a computer program stored on the memory 70 and executable on the processor 72, wherein the computer program is executed by the processor 72 to implement the steps as described in the method embodiment.

[0114] Device embodiment two

[0115] The embodiment of the application provides a computer readable storage medium, wherein the computer readable storage medium stores an implementation program of information transmission, and the program is executed by the processor 72 to implement the steps as described in the method embodiment.

[0116] The computer readable storage medium described in the embodiment includes but is not limited to ROM, RAM, magnetic disk or optical disk, etc.

[0117] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A method for reliability evaluation of small scale array antenna considering performance variation, characterized in that, Comprise: According to the array antenna structure, composition and failure characteristics of each part, the failure law and characteristics of the receiving and transmitting channel of the array antenna are analyzed, and serve as the basis for the state change of the array antenna; wherein, according to the array antenna structure, composition and failure characteristics of each part, the failure law and characteristics of the receiving and transmitting channel of the array antenna are analyzed specifically including: According to formula 1, the failure probability function of the receiving and transmitting channel of the array antenna is determined, wherein the failure probability of the receiving and transmitting channel is equal to the failure probability of the receiving and transmitting component: Formula 1 ; Wherein, λ is the failure rate, t represents time; According to the array antenna scale and structure, all possible states of the array antenna are determined, and the performance of the array antenna in different states is calculated, and according to the performance of each state of the array antenna and the performance requirements of the array antenna in the application process, all possible states of the array antenna are divided into available states and unavailable states; wherein, according to the array antenna scale and structure, all possible states of the array antenna are determined, and the performance of the array antenna in different states is calculated specifically including: Generating all states of array antenna: for array antenna with N transceiving channels, the number of faults n = 0, 1, …, N, for each number of faults, the corresponding state number is Then the number of all states of array antenna is , and the state set is S={ s i}, wherein s i is the i-th state of the array antenna, which contains N 0, 1 values, when s i (j) = 1, indicating that the j-th transceiving channel of the array antenna is normal; when s i (j) = 0, indicating that the j-th transceiving channel of the array antenna is failed; Pattern calculation: for each state s i , its channel signal amplitude is regenerated as A. s i and the array antenna pattern at this state is calculated according to the pattern formula; Performance parameter calculation: based on the directional diagram calculation result, the performance parameter values of the array antenna in different states are calculated according to the definition of each performance parameter; According to the array antenna channel failure law and characteristics, the probability function of each available state of the array antenna is calculated, the probability of the array antenna in the available state at different times is determined, all available state probability functions are added to obtain the available probability of the array antenna at different times, and the reliability function of the array antenna is obtained; Based on the array antenna reliability function, the average life of the array antenna is calculated.

2. The method of claim 1, wherein, According to the performance of each state of the array antenna and the performance requirements of the array antenna in the application process, all possible states of the array antenna are divided into available states and unavailable states specifically including: Let the application requirement threshold of each performance parameter be maxSLL L , avSLL L , HPBW L , FNBW L , and D L ; For the state of the array antenna under s i maxSLL si >maxSLL L , avSLL si >avSLL L , HPBW si <HPBW L , FNBW si <FNBW L , D si >D L , the state is a usable state, if any parameter cannot meet the application requirement, the state is an unusable state, wherein, the performance parameters and the application requirement threshold are set according to the application scene of the array antenna, the usable state means that the performance of the array antenna meets the application demand in the state, and the array antenna can be normally used; the unusable state means that the performance of the array antenna cannot meet the application demand in the state.

3. The method of claim 2, wherein, According to the array antenna channel failure law and characteristics, the probability function of each available state of the array antenna is calculated, the probability of the array antenna in the available state at different times is determined specifically including: For the available state s i The number N of normal transceiving channels in the array antenna n is: Formula 2: In this state, the number of faulty transceiving channels in the array antenna is N f = N-N n ; At time t, the available states are s i The probability of occurrence is: Equation 3.

4. The method of claim 3, wherein, All available state probability functions are added to obtain the available probability of the array antenna at different times, and the reliability function of the array antenna is obtained specifically including: Let the reliability function of the array antenna be R(t), then: Formula 4: wherein, s i is all available states.

5. The method of claim 4, wherein, Based on the array antenna reliability function, the average life of the array antenna is calculated specifically including: Based on the array antenna reliability function, the average life of the array antenna is calculated: Equation 5.

6. A small scale array antenna reliability evaluation system considering performance variation, characterized by, Comprise: The channel failure law module is used for analyzing the failure law and characteristics of the receiving and transmitting channel of the array antenna according to the array antenna structure, composition and failure characteristics of each part, and serving as the basis for the state change of the array antenna; specifically for: According to formula 1, the failure probability function of the receiving and transmitting channel of the array antenna is determined, wherein the failure probability of the receiving and transmitting channel is equal to the failure probability of the receiving and transmitting component: Formula 1 ; Wherein, λ is the failure rate, t represents time; The antenna performance module is used for determining all possible states of the array antenna according to the array antenna scale and structure, and calculating the performance of the array antenna in different states, and dividing all possible states of the array antenna into available states and unavailable states according to the performance of each state of the array antenna and the performance requirements of the array antenna in the application process; specifically for: Generating all states of array antenna: for array antenna with N transceiving channels, the number of faults n = 0, 1, …, N, for each number of faults, the corresponding state number is Then the number of all states of array antenna is , and the state set is S={ s i}, wherein s i is the i-th state of the array antenna, which contains N 0, 1 values, when s i (j) = 1, indicating that the j-th transceiving channel of the array antenna is normal; when s i (j) = 0, indicating that the j-th transceiving channel of the array antenna is failed; Pattern calculation: for each state s i , its channel signal amplitude is regenerated as A. s i , and the array antenna pattern under this state is calculated according to the pattern formula; Performance parameter calculation: based on the calculation results of the directional diagram, according to the definition of each performance parameter, the performance parameter values of the array antenna in different states are calculated; The array antenna reliability calculation module is used for calculating the array antenna available state probability function according to the array antenna channel failure law and characteristics, determining the probability of the array antenna in the available state at different times, adding all the available state probability functions to obtain the available probability of the array antenna at different times, and obtaining the array antenna reliability function; The array antenna average life calculation module is used for calculating the array antenna average life based on the array antenna reliability function.

7. An electronic device, comprising: It comprises: A memory, a processor and a computer program stored on the memory and executable on the processor, which, when executed by the processor, implements the steps of the small-scale array antenna reliability evaluation method considering performance changes according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores the implementation program of information transmission, and the program is executed by the processor to implement the steps of the small-scale array antenna reliability evaluation method considering performance changes according to any one of claims 1 to 5.

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