CN116973855A - T/R component failure threshold determining method, system, terminal and storage medium - Google Patents
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- G—PHYSICS
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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Abstract
The application discloses a method, a system, a terminal and a storage medium for determining a failure threshold of a T/R component, wherein the method comprises the following steps: determining the relation among the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of T/R components according to the directional diagram of the phased array antenna; determining a T/R component failure threshold according to a preset gain reduction rate threshold, a maximum detection distance reduction rate threshold, a side lobe level threshold, a gain reduction rate, a maximum detection distance reduction rate, and a relation between a side lobe level and the number of T/R components; and determining a dispersion parameter according to the distance between the fault T/R component and the center of the phased array surface, and correcting the failure threshold of the T/R component based on the dispersion parameter. The method can calculate the failure threshold values of the T/R components under different types of phased array radars and different failure conditions in real time, provides a theoretical basis for the maintenance opportunity selection of technicians, and reduces the maintenance cost.
Description
Technical Field
The application belongs to the technical field of T/R component failure, and particularly relates to a T/R component failure threshold determining method, a system, a terminal and a storage medium.
Background
The phased array radar is an important device for reverse guiding early warning, has the outstanding characteristics that the number of T/R components is hundreds to thousands or even tens of thousands due to the large array area of the antenna, and faults occur. Therefore, the maintenance mode selection of the T/R component of the array surface of the phased array radar antenna is crucial, the antenna performance parameters are taken as important basis of the maintenance mode selection, the antenna performance is hardly affected by the failure of a single T/R component, the antenna performance parameters are seriously affected only when the failure quantity of the T/R component reaches a certain threshold, and the influence degree of the T/R component on the antenna performance at different failure positions is different. Therefore, the selection of a proper phased array radar T/R component failure threshold calculation method is very important, and a theoretical basis can be provided for maintenance scheme formulation.
In the prior art, the failure quantity of the T/R components of the phased array radar is directly used as a failure threshold value which is 10% of the total T/R components. Although the method has certain universality, the diversity of phased array radars of different types is not considered, and a threshold selection method for 10% of the total T/R assembly number mainly depends on subjective experience, lacks theoretical basis and is not accurate enough.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the application provides a method, a system, a terminal and a storage medium for determining the failure threshold of a T/R assembly, which can calculate the failure threshold of the T/R assembly under different types of phased array radars and different failure conditions in real time, provide theoretical basis for the maintenance opportunity selection of technicians, and reduce the maintenance cost.
To achieve the above object, according to an aspect of the present application, there is provided a T/R component failure threshold determining method, including:
determining the relation among the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of T/R components according to the directional diagram of the phased array antenna;
determining a T/R component failure threshold according to a preset gain reduction rate threshold, a maximum detection distance reduction rate threshold, a side lobe level threshold, a gain reduction rate, a maximum detection distance reduction rate, and a relation between a side lobe level and the number of T/R components;
and determining a dispersion parameter according to the distance between the fault T/R component and the center of the phased array surface, and correcting the failure threshold of the T/R component based on the dispersion parameter.
Further, the determining the relation between the gain decreasing rate, the maximum detection distance decreasing rate, the side lobe level and the number of the T/R components according to the directional diagram of the phased array antenna comprises the following steps:
determining the relation between the antenna transmitting power, the gain and the maximum detection distance and the number of T/R components according to the directional diagram of the phased array antenna;
and determining the relation between the gain reduction rate and the maximum detection distance reduction rate according to the relation between the antenna transmission power, the gain and the maximum detection distance and the number of T/R components.
Further, the relation between the antenna transmitting power, the gain and the maximum detecting distance and the number of T/R components is as follows:
wherein w is 2 A scaling factor that is proportional to the square of the amplitude value for the power of the antenna element; sigma is the target effective reflective cross-sectional area; g r Gain for the receive antenna power; lambda is the radar working wavelength; t (T) 0 Is the standard noise temperature; k is Boltzmann constant; b (B) r For receiver bandwidth; f (F) r Is the noise figure of the receiver; (S/N) min Is the minimum detectable signal to noise ratio; number of T/R componentsM×n; a, a ik Excitation signal amplitude values of the array elements with coordinates (i, k); the function S (i, k) is the running state of the co-ordinate (i, k) array element.
Further, the relation between the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of T/R components is as follows:
wherein alpha is G Is the gain drop rate;is the maximum detection distance drop rate.
Further, the determining the relation between the gain decreasing rate, the maximum detecting distance decreasing rate, the side lobe level and the number of the T/R components according to the directional diagram of the phased array antenna further comprises:
the relationship between side lobe level and the number of T/R components is:
the pattern of the phased array antenna is:
wherein the maximum direction of the antenna beam isThe phase differences between adjacent antenna units along the y-axis and the z-axis are alpha, beta and j as imaginary parts respectively; d, d 1 、d 2 Array element spacing in the row and column directions of the antenna array surface is respectively; lambda is the wavelength;
substituting the failure quantity and the failure positions of different T/R components into the directional diagram for simulation to obtain the side lobe level.
Further, the determining the T/R component failure threshold according to the relationship between the preset gain decreasing rate threshold, the maximum detection distance decreasing rate threshold, the side lobe level threshold, the gain decreasing rate, the maximum detection distance decreasing rate, the side lobe level and the number of T/R components includes:
determining a gain reduction rate T/R component failure threshold value, a maximum detection distance reduction rate T/R component failure threshold value and a side lobe level T/R component failure threshold value according to a preset gain reduction rate threshold value, a maximum detection distance reduction rate threshold value, a side lobe level threshold value and a gain reduction rate, a maximum detection distance reduction rate, and a relation between the side lobe level and the number of T/R components;
and taking the minimum value of the gain reduction rate T/R component failure threshold, the maximum detection distance reduction rate T/R component failure threshold and the side lobe level T/R component failure threshold as the T/R component failure threshold.
Further, determining a dispersion parameter according to the distance between the fault T/R component and the center of the phased array surface, and correcting the failure threshold of the T/R component based on the dispersion parameter comprises the following steps:
for n T/R components in fault state, respectively using A 1 ，A 2 ，A 3 ，…，A n Representing that the distance between each fault T/R component and the center of the array surface is d 1 ，d 2 ，d 3 ，…，d n The method comprises the steps of carrying out a first treatment on the surface of the Taking the square sum S of the distances between the fault T/R components and the center of the array surface and the variance of the distances between the fault T/R components and the center of the array surface as the measurement parameters of the dispersion, wherein the measurement parameters comprise
Correcting the T/R component failure threshold according to the dispersion to obtain a final T/R component failure threshold:
wherein a, b and c are respectively a gain reduction rate T/R component failure threshold value, a maximum detection distance reduction rate T/R component failure threshold value and a side lobe level T/R component failure threshold value, S a 、S b First and second set values, delta, respectively, being the square of the distance of the individual T/R components from the center of the array plane a Setting for variance of distance between T/R assembly and array plane centerAnd (5) setting values.
According to a second aspect of the present application, there is provided a T/R component failure threshold determination system comprising:
the first main module is used for determining the relation among the gain decline rate, the maximum detection distance decline rate, the side lobe level and the number of the T/R assemblies according to the directional diagram of the phased array antenna;
the second main module is used for determining a T/R assembly failure threshold according to a preset gain decline rate threshold, a maximum detection distance decline rate threshold, a side lobe level threshold, a gain decline rate, a maximum detection distance decline rate, a relation between the side lobe level and the number of the T/R assemblies;
and the third main module is used for determining a dispersion parameter according to the distance between the fault T/R assembly and the center of the phased array surface and correcting the failure threshold value of the T/R assembly based on the dispersion parameter.
According to a third aspect of the present application, there is provided an electronic device comprising a processor and a memory, the processor and the memory being interconnected;
the memory is used for storing a computer program;
the processor is configured to execute the T/R component failure threshold determination method upon invoking the computer program.
According to a fourth aspect of the present application, there is provided a computer readable storage medium storing a computer program for execution by a processor to implement the T/R component failure threshold value determination method.
In general, the above technical solutions conceived by the present application, compared with the prior art, enable the following beneficial effects to be obtained:
1. according to the T/R component failure threshold determining method, the relation among the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of the T/R components is determined according to the directional diagram of the phased array antenna; determining a T/R component failure threshold according to a preset gain reduction rate threshold, a maximum detection distance reduction rate threshold, a side lobe level threshold, a gain reduction rate, a maximum detection distance reduction rate, and a relation between a side lobe level and the number of T/R components; and determining a dispersion parameter according to the distance between the fault T/R component and the center of the phased array surface, and correcting the failure threshold of the T/R component based on the dispersion parameter. According to the method, the T/R component failure threshold values under different dispersion distribution conditions can be calculated in real time, theoretical basis is provided for technical staff to select maintenance time, and maintenance times and maintenance cost are reduced.
2. According to the T/R component failure threshold value determining method, the dispersion parameter is determined according to the distance between the fault T/R component and the center of the phased array surface by introducing the dispersion concept, the T/R component failure threshold value is corrected based on the dispersion parameter, the T/R component failure threshold value is further optimized, the adaptability of the method under various different conditions is ensured, and the requirements of maintenance technicians are met.
Drawings
FIG. 1 is a flow chart of a T/R component failure threshold in accordance with an embodiment of the present application;
FIG. 2 is a diagram illustrating the positional relationship of a failed T/R device according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. In addition, the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Phased array radar: the phased array radar is a radar area array composed of a large number of identical radiating units, and each radiating unit is independently controlled by a wave control and a phase shifter in phase and amplitude, so that an accurate and predictable radiation pattern and beam pointing can be obtained. When the radar works, the transmitter distributes power to each antenna unit through the feeder line network, and the energy is radiated out through a large number of independent antenna units and is subjected to power synthesis in space to form the required beam direction. Phased array radars can be divided into two categories. First, passive (PESA for short); the second is active (AESA).
T/R component: T/R is an abbreviation for Transmitter and Receiver. The T/R assembly is generally referred to as the portion between the radio frequency and the antenna in a wireless transceiver system, i.e., the T/R assembly is connected to the antenna at one end and connected to the intermediate frequency processing unit at one end to form a wireless transceiver system. Its function is to amplify, phase shift and attenuate the signal. The T/R assembly generally comprises two transmitting and receiving branches, and the unit circuit comprises: local oscillators, up-down conversion, filters, low noise amplifiers, power amplifiers, duplex circuits, etc.
The application provides a T/R component failure threshold value determining method, which can be used in the following fields:
1. radar system: the T/R component is a core component of the radar system, and the performance of the radar system can be effectively monitored and maintained by determining the failure threshold.
2. Communication system: interference and disruption of communication signals may be prevented by determining a failure threshold.
3. Aerospace: reliability and safety of an aerospace system may be improved by determining a failure threshold.
4. Military system: stability and confidentiality of the military system can be ensured by determining the failure threshold.
5. Medical equipment: monitoring and maintenance of the T/R assembly is also significant to the proper operation of the medical device.
The application provides a T/R component failure threshold determining method, which specifically comprises the steps of S100-S300:
step S100, determining the relation among the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of T/R components according to the directional diagram of the phased array antenna;
step S200, determining a T/R component failure threshold according to the relation among a preset gain decline rate threshold, a maximum detection distance decline rate threshold, a side lobe level threshold, a gain decline rate, a maximum detection distance decline rate, a side lobe level and the number of T/R components;
and step S300, determining a dispersion parameter according to the distance between the fault T/R component and the center of the phased array surface, and correcting the failure threshold of the T/R component based on the dispersion parameter.
The directional diagram of the phased array antenna is obtained by the following method: determining the array structure of the antenna and the position parameters of the antenna elements; calculating the antenna gain and phase difference value of each element, and coding according to the designated phased array beam shape; calculating the transmitting moment of each element according to the codes, so that the elements generate coherent superimposed wave beams, and finally forming a required radiation pattern; according to the antenna gain and the radiation phase, calculating the radiation power and the polarization direction of the antenna; and combining the radiation power and the polarization direction to obtain the directional diagram of the whole antenna. From these steps, the pattern of the phased array antenna and its corresponding radiation characteristics can be calculated.
In one embodiment of the application, for a planar phased array antenna, the pattern can be expressed as:
wherein j is the imaginary part; d, d 1 、d 2 Array element spacing in the row and column directions of the antenna array surface is respectively; lambda is the wavelength; the array element structure is M×N, and the maximum direction of antenna beam isWherein the corresponding relation between the array elements and the T/R components is one-to-one, namely the number of the T/R components is M multiplied by N; a, a ik Excitation signal amplitude values for (i, k) array elements (irradiation a with uniform distribution during transmission) ik =1; the Taylor amplitude weighting is adopted during the receiving process; the function S (i, k) is the running state of the array element of the coordinate (i, k), S (i, k) =1 in normal operation, and S (i, k) =0 in the opposite failure fault; the phase differences between adjacent antenna elements along the y-axis and z-axis are α, β, respectively.
Further, the determining the relation between the gain dropping rate threshold, the maximum detection distance dropping rate threshold, the side lobe level threshold and the number of the T/R components according to the directional diagram of the phased array antenna comprises the following steps:
determining the relation between the antenna transmitting power, the gain and the maximum detection distance and the number of T/R components according to the directional diagram of the phased array antenna;
and determining the relation among the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of the T/R components according to the relation among the antenna transmission power, the gain, the maximum detection distance and the number of the T/R components.
In one embodiment of the application, for a planar phased array antenna, the antenna is according toThe directional diagram of the planar phased array antenna can obtain the total power P, the gain G and the maximum acting distance R of the antenna when the T/R component is not damaged max Namely, the relation between the antenna transmitting power, the gain and the maximum detecting distance and the number of T/R components is as follows:
wherein the power of the antenna unit is proportional to the square of the amplitude value, and the proportionality coefficient is w 2 The method comprises the steps of carrying out a first treatment on the surface of the Sigma is the target effective reflective cross-sectional area; g r Gain for the receive antenna power; lambda is the radar working wavelength; t (T) 0 Is the standard noise temperature; k is Boltzmann constant; b (B) r For receiver bandwidth; f (F) r Is the noise figure of the receiver; (S/N) min Is the minimum detectable signal to noise ratio.
In one embodiment of the application, taking a planar phased array radar as an example, the array element structure is MxN, and the maximum direction of an antenna beam isWherein the corresponding relation between the array elements and the T/R components is one-to-one, namely the number of the T/R components is M multiplied by N, and the equidistant spacing between the adjacent array elements is half-wavelength, namely d 1 ＝d 2 The amplitude values of the transmitting array element excitation signals are uniformly distributed, and the amplitude values of the receiving array element excitation signals follow the Taylor distribution with an ideal side lobe of-35 dB.
According to the total power P, gain G and maximum distance R of antenna max The relationship between the gain reduction rate, the maximum detection distance reduction rate and the number of T/R components can be obtained, and the relationship comprises the following steps:
wherein alpha is G Is the gain drop rate;is the maximum detection distance drop rate.
Further, the relation between the side lobe level and the number of the T/R components is determined according to the directional diagram of the phased array antenna, specifically:
the pattern of the phased array antenna is:
wherein the maximum direction of the antenna beam isThe phase differences between adjacent antenna units along the y-axis and the z-axis are alpha and beta respectively;
substituting the number and the positions of undamaged T/R components into a directional diagram for simulation to obtain the side lobe level.
Specifically, the number and location of T/R components of the phased array are known, and if the number and location of damaged T/R components are obtained, the number and location of undamaged T/R components can be obtained. The number and the positions of undamaged T/R components are substituted into a directional diagram, the gain of the antenna directional diagram can be calculated, a local value (maximum value) is found by utilizing the fndpeaks function of matlab, the maximum peak value (main lobe peak value) is removed, the rest peak values are side lobe peak values, and the maximum peak value in the side lobe peak values is the first side lobe peak value, namely the side lobe level. The side lobe level is the second largest peak of the maximum peaks of the gain of the antenna pattern.
In one embodiment of the present application, the fandpeaks function of matlab is used to find maxima, which can also be simulated or calculated by other means.
When the side lobe level is known, the number and the positions of the undamaged T/R components corresponding to the side lobe level can be obtained by adjusting different numbers and positions of the T/R components in a direction diagram for simulation, and the number and the positions of the damaged T/R components can be further obtained, so that if the side lobe level threshold is known, the T/R component failure threshold can be obtained through simulation.
Further, in an embodiment of the present application, the preset gain decreasing rate threshold, the maximum detection distance decreasing rate threshold, the side lobe level threshold, includes:
and determining a preset gain decline rate threshold value, a maximum detection distance decline rate threshold value and a side lobe level threshold value according to the type of the phased array radar.
In one embodiment of the application, for different types of phased array radar, the preset gain reduction rate threshold, the maximum detection distance reduction rate threshold and the sidelobe level threshold are selected according to expert experience, wherein the optimal gain reduction rate threshold is 10%, the maximum detection distance reduction rate threshold is 15% and the sidelobe level threshold is-29 db.
Further, in one embodiment of the present application, the determining the T/R component failure threshold according to the relationship between the preset gain decreasing rate threshold, the maximum detection distance decreasing rate threshold, the side lobe level threshold, the gain decreasing rate, the maximum detection distance decreasing rate, the side lobe level and the number of T/R components includes:
determining a gain reduction rate T/R component failure threshold value, a maximum detection distance reduction rate T/R component failure threshold value and a side lobe level T/R component failure threshold value according to a preset gain reduction rate threshold value, a maximum detection distance reduction rate threshold value, a side lobe level threshold value and a gain reduction rate, a maximum detection distance reduction rate, and a relation between the side lobe level and the number of T/R components;
and taking the minimum value of the gain reduction rate T/R component failure threshold, the maximum detection distance reduction rate T/R component failure threshold and the side lobe level T/R component failure threshold as the T/R component failure threshold.
Specifically, substituting a preset gain reduction rate threshold value and a maximum detection distance reduction rate threshold value into the relation among the gain reduction rate, the maximum detection distance reduction rate and the number of the T/R components to obtain a gain reduction rate T/R component failure threshold value and a maximum detection distance reduction rate T/R component failure threshold value; according to the side lobe level threshold, the number and positions of the undamaged T/R components corresponding to the side lobe level can be obtained by adjusting the number and positions of different T/R components in the direction diagram for simulation, the number and positions of damaged T/R components can be further obtained, and finally the T/R component failure threshold is obtained.
Specifically, the minimum value (the number of T/R component failures a under the side lobe level threshold, the number of T/R component failures b under the gain reduction rate threshold, and the number of T/R component failures c under the maximum detection distance reduction rate threshold) among the three parameters is taken as the T/R component failure threshold.
Determining a dispersion parameter according to the distance between the fault T/R component and the center of the phased array surface, and correcting the failure threshold of the T/R component based on the dispersion parameter, wherein the method comprises the following steps:
for n T/R components in fault state, respectively using A 1 ，A 2 ，A 3 ，…，A n Representing that the distance between each fault T/R component and the center of the array surface is d 1 ，d 2 ，d 3 ，…，d n The method comprises the steps of carrying out a first treatment on the surface of the Taking the square sum S of the distances between the fault T/R components and the center of the array surface and the variance of the distances between the fault T/R components and the center of the array surface as the measurement parameters of the dispersion, wherein the measurement parameters comprise
Correcting the T/R component failure threshold according to the dispersion to obtain a final T/R component failure threshold:
wherein a, b and c are respectively a gain reduction rate T/R component failure threshold value, a maximum detection distance reduction rate T/R component failure threshold value and a side lobe level T/R component failure threshold value, S a 、S b First and second set values, delta, respectively, being the square of the distance of the individual T/R components from the center of the array plane a Is the set value of the variance of the distance of the T/R component from the center of the array plane.
Specifically, as shown in fig. 2, the application introduces the concept of dispersion, and further corrects the influence of the failure position of the T/R component on the antenna performance by analyzing the influence of the dispersion degree of the distance of the failure T/R component from the center of the antenna array surface on the antenna performance, thereby ensuring the adaptability of the method under various different conditions. The n T/R components are in fault states and are respectively represented by A1, A2, A3, … and An, and the distances from the fault T/R components to the center of the array surface are respectively d1, d2, d3, … and dn; and taking the square sum S of the distances between the fault T/R components and the center of the array surface and the variance of the distances between the fault T/R components and the center of the array surface as measurement parameters of the dispersion, and obtaining an expression of the dispersion.
On the basis, n T/R component failure positions are combinedEach failure combination corresponds to different antenna performance parameters, and the failure threshold has the characteristic of robustness, so the application divides the dispersion parameters into three categories, namely when the dispersion measurement parameters meet different conditions, the T/R component failure threshold has the following three categories:
wherein a, b and c are respectively a gain reduction rate T/R component failure threshold value, a maximum detection distance reduction rate T/R component failure threshold value and a side lobe level T/R component failure threshold value, S a 、S b A first set value and a second set value which are respectively the square of the distance of the single T/R component from the center of the array surface, S a Less than S b ，δ a Is the set value of the variance of the distance of the T/R component from the center of the array plane.
In the present application, S a 、S b The specific setting value of the antenna array is set according to the influence degree of the distance between the failed T/R component and the center of the antenna array surface on the failure threshold of the T/R component.
The method of the application determines the relation of the gain decline rate, the maximum detection distance decline rate, the side lobe level and the number of T/R components according to the directional diagram of the phased array antenna; determining a T/R component failure threshold according to a preset gain reduction rate threshold, a maximum detection distance reduction rate threshold, a side lobe level threshold, a gain reduction rate, a maximum detection distance reduction rate, and a relation between a side lobe level and the number of T/R components; and determining a dispersion parameter according to the distance between the fault T/R component and the center of the phased array surface, and correcting the failure threshold of the T/R component based on the dispersion parameter. According to the method, the T/R component failure threshold values under different dispersion distribution conditions can be calculated in real time, theoretical basis is provided for technical staff to select maintenance opportunity, maintenance times and maintenance cost are reduced, and maintenance cost is saved.
The implementation basis of the embodiments of the present application is realized by a device with a central processing unit function to perform programmed processing. Therefore, in engineering practice, the technical solutions and the functions of the embodiments of the present application can be packaged into various modules. Based on this actual situation, on the basis of the above embodiments, an embodiment of the present application provides a T/R component failure threshold determining system, which is configured to execute the T/R component failure threshold determining method in the above method embodiment. Comprising the following steps:
the first main module is used for determining the relation among the gain decline rate, the maximum detection distance decline rate, the side lobe level and the number of the T/R assemblies according to the directional diagram of the phased array antenna;
the second main module is used for determining a T/R assembly failure threshold according to a preset gain decline rate threshold, a maximum detection distance decline rate threshold, a side lobe level threshold, a gain decline rate, a maximum detection distance decline rate, a relation between the side lobe level and the number of the T/R assemblies;
and the third main module is used for determining a dispersion parameter according to the distance between the fault T/R assembly and the center of the phased array surface and correcting the failure threshold value of the T/R assembly based on the dispersion parameter.
It should be noted that, the device in the device embodiment provided by the present application may be used to implement the method in the above method embodiment, and may also be used to implement the method in other method embodiments provided by the present application, where the difference is merely that the corresponding functional module is provided, and the principle is basically the same as that of the above device embodiment provided by the present application, so long as a person skilled in the art refers to a specific technical solution in the above device embodiment based on the above device embodiment, and obtains a corresponding technical means by combining technical features, and a technical solution formed by these technical means, and on the premise that the technical solution is ensured to have practicability, the device in the above device embodiment may be modified, so as to obtain a corresponding device embodiment, and be used to implement the method in other method embodiment.
The method of the embodiment of the application is realized by the electronic equipment, so that the related electronic equipment is necessary to be introduced. To this end, an embodiment of the present application provides an electronic device including: at least one central processing unit (Central processor), a communication interface (Communications Interface), at least one Memory (Memory) and a communication bus, wherein the at least one central processing unit, the communication interface, and the at least one Memory perform communication with each other via the communication bus. The at least one central processing unit may invoke logic instructions in the at least one memory to perform all or part of the steps of the methods provided by the various method embodiments described above.
Further, the logic instructions in at least one of the memories described above may be implemented in the form of a software functional unit and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or may be implemented by hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Based on this knowledge, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In the present disclosure, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the application and is not intended to limit the application, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (10)
1. A method for determining a failure threshold of a T/R assembly, comprising:
determining the relation among the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of T/R components according to the directional diagram of the phased array antenna;
determining a T/R component failure threshold according to a preset gain reduction rate threshold, a maximum detection distance reduction rate threshold, a side lobe level threshold, a gain reduction rate, a maximum detection distance reduction rate, and a relation between a side lobe level and the number of T/R components;
and determining a dispersion parameter according to the distance between the fault T/R component and the center of the phased array surface, and correcting the failure threshold of the T/R component based on the dispersion parameter.
2. The method for determining the failure threshold of the T/R assembly according to claim 1, wherein determining the relation between the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of T/R assemblies according to the pattern of the phased array antenna comprises:
determining the relation between the antenna transmitting power, the gain and the maximum detection distance and the number of T/R components according to the directional diagram of the phased array antenna;
and determining the relation between the gain reduction rate and the maximum detection distance reduction rate according to the relation between the antenna transmission power, the gain and the maximum detection distance and the number of T/R components.
3. The method for determining a failure threshold of a T/R assembly according to claim 2, wherein the relation between the antenna transmission power, the gain and the maximum detection distance and the number of T/R assemblies is:
wherein w is 2 A scaling factor that is proportional to the square of the amplitude value for the power of the antenna element; sigma is the target effective reflective cross-sectional area; g r Gain for the receive antenna power; lambda is the radar working wavelength; t (T) 0 Is the standard noise temperature; k is Boltzmann constant; b (B) r For receiver bandwidth; f (F) r Is the noise figure of the receiver; (S/N) min Is the minimum detectable signal to noise ratio; the number of the T/R components is M multiplied by N; a, a ik Excitation signal amplitude values of the array elements with coordinates (i, k); the function S (i, k) is the running state of the co-ordinate (i, k) array element.
4. The method for determining a failure threshold of a T/R assembly according to claim 2, wherein the relationship between the gain reduction rate, the maximum detection distance reduction rate, the side lobe level and the number of T/R assemblies is:
wherein alpha is G Is the gain drop rate;is the maximum detection distance drop rate.
5. The method for determining a failure threshold of a T/R assembly according to claim 2, wherein the determining a relationship between a gain reduction rate, a maximum probe distance reduction rate, a side lobe level and the number of T/R assemblies according to a pattern of the phased array antenna further comprises:
determining the relation between the sidelobe level and the number of T/R components according to the directional diagram of the phased array antenna:
the pattern of the phased array antenna is:
wherein, the maximum direction of the antenna beam is theta,the phase differences between adjacent antenna units along the y-axis and the z-axis are alpha and beta respectively;
substituting the failure quantity and the failure positions of different T/R components into the directional diagram for simulation to obtain the side lobe level.
6. The method for determining a failure threshold of a T/R assembly according to claim 1, wherein the determining the failure threshold of the T/R assembly according to the relationship between the preset gain-down rate threshold, the maximum detection-distance-down rate threshold, the side lobe level threshold and the gain-down rate, the maximum detection-distance-down rate, the side lobe level and the number of T/R assemblies comprises:
determining a gain reduction rate T/R component failure threshold value, a maximum detection distance reduction rate T/R component failure threshold value and a side lobe level T/R component failure threshold value according to a preset gain reduction rate threshold value, a maximum detection distance reduction rate threshold value, a side lobe level threshold value and a gain reduction rate, a maximum detection distance reduction rate, and a relation between the side lobe level and the number of T/R components;
and taking the minimum value of the gain reduction rate T/R component failure threshold, the maximum detection distance reduction rate T/R component failure threshold and the side lobe level T/R component failure threshold as the T/R component failure threshold.
7. The method for determining a failure threshold of a T/R assembly according to claim 1, wherein determining a dispersion parameter according to a distance between a failed T/R assembly and a center of a phased array plane, and correcting the failure threshold of the T/R assembly based on the dispersion parameter comprises:
for n T/R components in fault state, respectively using A 1 ，A 2 ，A 3 ，…，A n Representing that the distance between each fault T/R component and the center of the array surface is d 1 ，d 2 ，d 3 ，…，d n The method comprises the steps of carrying out a first treatment on the surface of the Taking the square sum S of the distances between the fault T/R components and the center of the array surface and the variance of the distances between the fault T/R components and the center of the array surface as the measurement parameters of the dispersion, wherein the measurement parameters comprise
Correcting the T/R component failure threshold according to the dispersion to obtain a final T/R component failure threshold:
wherein a, b and c are respectively a gain reduction rate T/R component failure threshold value, a maximum detection distance reduction rate T/R component failure threshold value and a side lobe level T/R component failure threshold value, S a 、S b First and second set values, delta, respectively, being the square of the distance of the individual T/R components from the center of the array plane a Is the set value of the variance of the distance of the T/R component from the center of the array plane.
8. A T/R assembly failure threshold determination system, comprising:
the first main module is used for determining the relation among the gain decline rate, the maximum detection distance decline rate, the side lobe level and the number of the T/R assemblies according to the directional diagram of the phased array antenna;
the second main module is used for determining a T/R assembly failure threshold according to a preset gain decline rate threshold, a maximum detection distance decline rate threshold, a side lobe level threshold, a gain decline rate, a maximum detection distance decline rate, a relation between the side lobe level and the number of the T/R assemblies;
and the third main module is used for determining a dispersion parameter according to the distance between the fault T/R assembly and the center of the phased array surface and correcting the failure threshold value of the T/R assembly based on the dispersion parameter.
9. An electronic device comprising a processor and a memory, the processor and the memory being interconnected;
the memory is used for storing a computer program;
the processor is configured to perform the T/R component failure threshold determination method of any of claims 1 to 7 when the computer program is invoked.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program that is executed by a processor to implement the T/R component failure threshold determination method of any one of claims 1 to 7.
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