CN110441620B - Multi-frequency-point dynamic zero searching method and system for antenna housing aiming line error test - Google Patents
Multi-frequency-point dynamic zero searching method and system for antenna housing aiming line error test Download PDFInfo
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- CN110441620B CN110441620B CN201910750727.4A CN201910750727A CN110441620B CN 110441620 B CN110441620 B CN 110441620B CN 201910750727 A CN201910750727 A CN 201910750727A CN 110441620 B CN110441620 B CN 110441620B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G7/00—Direction control systems for self-propelled missiles
- F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
- F41G7/24—Beam riding guidance systems
- F41G7/28—Radio guidance systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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Abstract
The invention discloses a multi-frequency point dynamic zero searching method and a system for testing the error of an aiming line of an antenna cover, wherein the method comprises the following steps: the main control computer controls the turntable provided with the receiving antenna to move to a zero position through the turntable controller of the scanning frame, and controls the scanning frame to move the transmitting antenna to a calibration position so as to align the transmitting antenna and the receiving antenna geometrically; the main control computer controls the movement of the scanning frame through a set stroke to obtain a differential channel directional diagram of the receiving antenna according to the set test parameters through the scanning frame rotary table controller, and then controls the scanning frame to move the transmitting antenna to a zero-depth position corresponding to the central frequency point to realize electric axis alignment; and the main control computer respectively obtains the zero depth positions of all the frequency points at all the angles under the test without the cover and the test with the cover, and calculates the error of the antenna cover aiming line of each frequency point at each angle.
Description
Technical Field
The invention belongs to the technical field of testing of missile radomes, and particularly relates to a multi-frequency-point dynamic zero searching method and system for testing the error of an aiming line of a radome.
Background
The radome is one of the important components of the air defense missile weapon system. The antenna cover protects the seeker antenna from being interfered by adverse factors of an external environment, but the radiation characteristic of the antenna can be influenced by the wall of the antenna cover, so that electromagnetic wave transmission loss and antenna beam pointing deviation are caused, and the working distance and the guidance precision of the guidance system are reduced. The electrical performance test of the antenna housing is a problem to be solved urgently in the field of the antenna housing and the field of microwave measurement, and generally comprises a power transmission coefficient test part and an aiming line error test part, wherein the aiming line error test part is always the direction of the key research of the electrical performance test of the antenna housing.
The testing method of the radome aiming line error mainly comprises an electronic scaling method, an electric axis tracking method and a zero searching method, however, the inventor finds that a scaling curve of a receiving level and an aiming error needs to be established in an electronic scaling method testing system in the research process, and the scaling curve is often needed to be reestablished for a newly developed radome, so that certain defects exist. The electric axis tracking method is used for receiving the rotation of an antenna, and has the disadvantages of high requirements on the mechanical precision and response speed of a turntable, high cost and difficult realization. The zero searching method comprises static zero searching and dynamic zero searching, wherein the static zero searching and the dynamic zero searching can use the same system composition, and the difference lies in a zero searching algorithm. The static zero search algorithm is as follows: after the geometric alignment of the receiving and transmitting antennas, a fixed stroke is given, the turntable provided with the receiving antenna moves to a set angle, the scanning frame moves forwards for one stroke, the turntable moves to the next angle, the scanning frame moves backwards for one stroke, and the steps are repeated in a circulating mode until all the angles are tested.
The static zero searching method for testing the error of the antenna cover aiming line under the dot frequency is realized, but the method has two defects:
(1) only supporting point frequency, the test of multiple frequency points needs to be repeated for multiple times;
(2) and a static zero searching method is adopted, and the zero searching stroke is long and fixed.
For the antenna housing with the requirement of multi-frequency point test, the two defects result in long test time and low efficiency.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a multi-frequency point dynamic zero searching method and a multi-frequency point dynamic zero searching system for testing the antenna housing aiming line error, which can simultaneously test the aiming line errors of different frequency points, dynamically change the motion track in the zero searching process, greatly reduce the zero searching stroke and improve the zero searching speed. The invention greatly improves the testing efficiency from two aspects of multi-frequency point and dynamic zero searching, and meets increasingly heavy testing requirements.
According to an aspect of one or more embodiments of the present disclosure, a multi-frequency point dynamic zero search method for a radome boresight error test is provided.
A multi-frequency point dynamic zero searching method for an antenna housing aiming line error test comprises the following steps:
sending a control instruction for controlling the turntable to move to a zero position and a control instruction for controlling the scanning frame to move the transmitting antenna to a calibration position to a scanning frame turntable controller so as to align the transmitting antenna and the receiving antenna geometrically;
receiving the set test parameters and the travel set by the motion of the scanning frame, sending a control instruction of the travel set by the motion of the scanning frame to a rotary table controller of the scanning frame, and acquiring a difference channel directional diagram of the antenna; generating a control instruction for moving the transmitting antenna to a zero-depth position corresponding to the central frequency point, sending the control instruction to a scanner frame turntable controller, and controlling the scanner frame to align the electric axes of the transmitting and receiving antennas;
and respectively acquiring zero depth positions of all frequency points at all angles under the test without a cover and the test with a cover, and calculating the antenna housing aiming line error of each frequency point at each angle.
Further, in the method, the set test parameters include a zero search speed, a sampling interval, a start and end angle, an angle interval, a frequency, a scanning range of the electric axis alignment, and a scanning interval.
Furthermore, in the method, a dynamic zero searching method is adopted to perform zero depth positions of all frequency points at all angles under a coverless test.
Furthermore, in the method, a dynamic zero searching method is adopted to carry out zero depth positions of all frequency points at all angles under the test of the belt cover.
Further, in the method, the specific steps of the dynamic zero search method include:
sending a control instruction for controlling the scanning frame to move in the initial direction at the set zero searching speed to a scanning frame turntable controller according to the set zero searching speed;
reading vector net difference channel data in real time, simultaneously recording the position of a corresponding scanning frame, and judging the amplitude change of each frequency point according to the data of three sampling points;
determining the position relation between the zero depth position and the movement direction of each frequency point according to the monotonicity of the amplitude change of each frequency point, determining the movement direction, and finishing zero searching of the angle;
and sending a control command for controlling the rotary table to rotate by an increment to the scanner rotary table controller, and carrying out zero searching at the next angle until the test of all angles is finished.
Further, in the method, the specific steps of judging the position relationship between the zero depth and the motion direction of each frequency point according to the monotonicity of the amplitude change of each frequency point, determining the motion direction, and completing zero search at the angle include:
if the amplitudes of all the frequency points are monotonically decreased, the motion direction is not changed, vector network data are continuously collected until the amplitudes of all the frequency points are monotonically increased, a control instruction for stopping the scanning frame is sent to a scanning frame turntable controller, and the position with the minimum amplitude is recorded as a zero-depth position;
if the amplitudes of all the frequency points are monotonically increased, sending a control instruction for controlling the scanning frame to stop and move reversely to the scanning frame rotary table controller, sending the control instruction for stopping the scanning frame to the scanning frame rotary table controller until the amplitudes of all the frequency points are monotonically increased, and recording the position with the minimum amplitude as a zero-depth position;
if the amplitudes of the frequency points are monotonically decreased and the amplitudes of the frequency points are monotonically increased, the moving direction is not changed until the amplitudes of all the frequency points are monotonically increased, a control instruction for controlling the scanning frame to stop and move reversely is sent to the scanning frame turntable controller, until the amplitudes of all the frequency points are monotonically increased, a control instruction for controlling the scanning frame to stop is sent to the scanning frame turntable controller, and the position with the minimum amplitude is recorded as the zero depth position.
According to an aspect of one or more embodiments of the present disclosure, there is provided a computer-readable storage medium.
A computer-readable storage medium having stored therein a plurality of instructions adapted to be loaded by a processor of a terminal device and to execute the multi-frequency point dynamic zero search method for radome boresight error test.
In accordance with an aspect of one or more embodiments of the present disclosure, an electronic device is provided.
An electronic device comprising a processor and a computer-readable storage medium, the processor to implement instructions; the computer readable storage medium is used for storing a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the multi-frequency point dynamic zero searching method for the radome line-of-sight error test.
According to an aspect of one or more embodiments of the present disclosure, a multi-frequency point dynamic zero search apparatus for a radome boresight error test is provided.
A multi-frequency point dynamic zero searching device for an antenna housing aiming line error test is based on the multi-frequency point dynamic zero searching method for the antenna housing aiming line error test, and comprises the following steps:
the geometric alignment module is configured to send a control command for controlling the turntable to move to a zero point position and a control command for controlling the scanning frame to move the transmitting antenna to a calibration position to the scanning frame turntable controller so as to align the transmitting and receiving antennas geometrically;
the electric axis alignment module is configured to receive the set test parameters and the set stroke of the motion of the scanning frame, send a control instruction of the set stroke of the motion of the scanning frame to the scanning frame turntable controller and acquire a difference channel directional diagram of the antenna; generating a control instruction for moving the transmitting antenna to a zero-depth position corresponding to the central frequency point, sending the control instruction to a scanner frame turntable controller, and controlling the scanner frame to align the electric axes of the transmitting and receiving antennas;
the maskless test module is configured to acquire zero depth positions of all frequency points at all angles under the maskless test;
the test module with the cover is configured to obtain zero depth positions of all frequency points at all angles under the test with the cover;
and the aiming line error calculation module is configured to calculate the aiming line error according to the zero-depth positions of all the frequency points at all the angles under the uncovered test and the zero-depth positions of all the frequency points at all the angles under the covered test.
According to an aspect of one or more embodiments of the present disclosure, a multi-frequency point dynamic zero search system for radome boresight error testing is provided.
A multi-frequency point dynamic zero searching system for an antenna housing aiming line error test comprises a main control computer, wherein the main control computer executes the multi-frequency point dynamic zero searching method for the antenna housing aiming line error test, the main control computer is respectively connected with a vector network analyzer and a scanning frame rotary table controller, the vector network analyzer is connected with the scanning frame rotary table controller, the scanning frame rotary table controller is respectively connected with a scanning frame and a rotary table, a transmitting antenna is arranged on the scanning frame, a receiving antenna is arranged on the rotary table, and the vector network analyzer is respectively connected with the transmitting antenna and the receiving antenna.
Furthermore, the main control computer is respectively connected with the vector network analyzer and the scanner frame turntable controller through the switch;
the vector network analyzer is connected with the transmitting antenna through a power amplifier and a directional coupler in sequence, and the directional coupler is connected with the vector network analyzer;
the receiving antenna and the channel are connected with the vector network analyzer, and the difference channel is connected with the vector network analyzer through a low noise amplifier.
According to an aspect of one or more embodiments of the present disclosure, a multi-frequency point dynamic zero search method for a radome boresight error test is provided.
A multi-frequency point dynamic zero searching method for an antenna housing aiming line error test comprises the following steps:
the main control computer controls the turntable provided with the receiving antenna to move to a zero position through the turntable controller of the scanning frame, and controls the scanning frame to move the transmitting antenna to a calibration position so as to align the transmitting antenna and the receiving antenna geometrically;
the main control computer controls the movement of the scanning frame through a set stroke to obtain a differential channel directional diagram of the receiving antenna according to the set test parameters through the scanning frame rotary table controller, and then controls the scanning frame to move the transmitting antenna to a zero-depth position corresponding to the central frequency point to realize electric axis alignment;
and the main control computer respectively obtains the zero depth positions of all the frequency points at all the angles under the test without the cover and the test with the cover, and calculates the error of the antenna cover aiming line of each frequency point at each angle.
The above one or more technical solutions have the following beneficial effects:
the invention discloses a multi-frequency point dynamic zero searching method and a system for testing the error of an aiming line of an antenna housing, which apply the key technologies of servo control, centralized distributed control, self-adaptive control principle, data real-time processing and the like, thereby not only ensuring the testing precision, but also improving the efficiency and realizing the rapid zero searching of the multi-angle multi-frequency points of the antenna housing; the multi-frequency-point simultaneous testing is effectively realized, the zero searching stroke is dynamically adjusted, the zero searching time is shortened, and the testing efficiency of the antenna housing aiming line error is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic diagram of a radome boresight error testing system in accordance with one or more embodiments of the present invention;
FIG. 2 is a flow diagram of a line-of-sight error test in accordance with one or more embodiments of the present invention;
FIG. 3 is a normalized difference pattern for a single pulse regime seeker antenna according to one or more embodiments of the present disclosure;
FIG. 4 is a difference channel pattern for three frequency points in accordance with one or more embodiments of the present invention;
FIG. 5 is a flow diagram of a dynamic zero search control algorithm according to one or more embodiments of the invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It is noted that the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of methods and systems according to various embodiments of the present disclosure. It should be noted that each block in the flowchart or block diagrams may represent a module, a segment, or a portion of code, which may comprise one or more executable instructions for implementing the logical function specified in the respective embodiment. 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 flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, 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.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In order to overcome the defects of the prior art, the invention provides a multi-frequency point dynamic zero searching method and a multi-frequency point dynamic zero searching system for testing the antenna housing aiming line error, which can simultaneously test the aiming line errors of different frequency points, dynamically change the motion track in the zero searching process, greatly reduce the zero searching stroke and improve the zero searching speed. The invention greatly improves the testing efficiency from two aspects of multi-frequency point and dynamic zero searching, and meets increasingly heavy testing requirements.
Example one
According to an aspect of one or more embodiments of the present disclosure, a multi-frequency point dynamic zero search method for a radome boresight error test is provided.
A multi-frequency point dynamic zero searching method for an antenna housing aiming line error test comprises the following steps:
step S1: sending a control instruction for controlling the turntable to move to a zero position and a control instruction for controlling the scanning frame to move the transmitting antenna to a calibration position to a scanning frame turntable controller so as to align the transmitting antenna and the receiving antenna geometrically;
step S2: receiving the set test parameters and the travel set by the motion of the scanning frame, sending a control instruction of the travel set by the motion of the scanning frame to a rotary table controller of the scanning frame, and acquiring a difference channel directional diagram of the antenna; generating a control instruction for moving the transmitting antenna to a zero-depth position corresponding to the central frequency point, sending the control instruction to a scanner frame turntable controller, and controlling the scanner frame to align the electric axes of the transmitting and receiving antennas;
step S3: and respectively acquiring zero depth positions of all frequency points at all angles under the test without a cover and the test with a cover, and calculating the antenna housing aiming line error of each frequency point at each angle.
In step S2 of the present embodiment, the set test parameters include a zero search speed, a sampling interval, a start/end angle, an angle interval, a frequency, a scanning range of the electrical axis alignment, and a scanning interval.
In step S4 of this embodiment, the zero depth positions of all frequency points at all angles under the maskless test by the dynamic zero search method are received.
And receiving zero depth positions of all frequency points at all angles under the test of the belt cover by adopting a dynamic zero searching method.
Further, in the method, the specific steps of the dynamic zero search method include:
sending a control instruction for controlling the scanning frame to move in the initial direction at the set zero searching speed to a scanning frame turntable controller according to the set zero searching speed;
reading difference channel data acquired by the vector network in real time, simultaneously recording the position of a corresponding scanning frame, and judging the amplitude change of each frequency point according to the data of three sampling points;
determining the position relation between the zero depth position and the movement direction of each frequency point according to the monotonicity of the amplitude change of each frequency point, determining the movement direction, and finishing zero searching of the angle;
and sending a control command for controlling the rotary table to rotate by an increment to the scanner rotary table controller, and carrying out zero searching at the next angle until the test of all angles is finished.
Further, in the method, the specific steps of judging the position relationship between the zero depth and the motion direction of each frequency point according to the monotonicity of the amplitude change of each frequency point, determining the motion direction, and completing zero search at the angle include:
if the amplitudes of all the frequency points are monotonically decreased, the motion direction is not changed, vector network data are continuously read until the amplitudes of all the frequency points are monotonically increased, a control instruction for stopping the scanning frame is sent to a scanning frame turntable controller, and the position with the minimum amplitude is recorded as a zero-depth position;
if the amplitudes of all the frequency points are monotonically increased, sending a control instruction for controlling the scanning frame to stop and move reversely to the scanning frame rotary table controller, sending the control instruction for stopping the scanning frame to the scanning frame rotary table controller until the amplitudes of all the frequency points are monotonically increased, and recording the position with the minimum amplitude as a zero-depth position;
if the amplitudes of the frequency points are monotonically decreased and the amplitudes of the frequency points are monotonically increased, the moving direction is not changed until the amplitudes of all the frequency points are monotonically increased, a control instruction for controlling the scanning frame to stop and move reversely is sent to the scanning frame turntable controller, until the amplitudes of all the frequency points are monotonically increased, a control instruction for controlling the scanning frame to stop is sent to the scanning frame turntable controller, and the position with the minimum amplitude is recorded as the zero depth position.
Example two
According to an aspect of one or more embodiments of the present disclosure, there is provided a computer-readable storage medium.
A computer-readable storage medium having stored therein a plurality of instructions adapted to be loaded by a processor of a terminal device and to execute the multi-frequency point dynamic zero search method for radome boresight error test.
EXAMPLE III
In accordance with an aspect of one or more embodiments of the present disclosure, an electronic device is provided.
An electronic device comprising a processor and a computer-readable storage medium, the processor to implement instructions; the computer readable storage medium is used for storing a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the multi-frequency point dynamic zero searching method for the radome line-of-sight error test.
These computer-executable instructions, when executed in a device, cause the device to perform methods or processes described in accordance with various embodiments of the present disclosure.
In the present embodiments, a computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for performing various aspects of the present disclosure. The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described in this disclosure may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device over a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present disclosure may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry can execute computer-readable program instructions to implement aspects of the present disclosure by utilizing state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).
Example four
According to an aspect of one or more embodiments of the present disclosure, a multi-frequency point dynamic zero search apparatus for a radome boresight error test is provided.
A multi-frequency point dynamic zero searching device for an antenna housing aiming line error test is based on the multi-frequency point dynamic zero searching method for the antenna housing aiming line error test, and comprises the following steps:
the geometric alignment module is configured to send a control command for controlling the turntable to move to a zero point position and a control command for controlling the scanning frame to move the transmitting antenna to a calibration position to the scanning frame turntable controller so as to align the transmitting and receiving antennas geometrically;
the electric axis alignment module is configured to receive the set test parameters and the set stroke of the motion of the scanning frame, send a control instruction of the set stroke of the motion of the scanning frame to the scanning frame turntable controller and acquire a difference channel directional diagram of the antenna; generating a control instruction for moving the transmitting antenna to a zero-depth position corresponding to the central frequency point, sending the control instruction to a scanner frame turntable controller, and controlling the scanner frame to align the electric axes of the transmitting and receiving antennas;
the maskless test module is configured to acquire zero depth positions of all frequency points at all angles under the maskless test;
the test module with the cover is configured to obtain zero depth positions of all frequency points at all angles under the test with the cover;
and the aiming line error calculation module is configured to calculate the aiming line error according to the zero-depth positions of all the frequency points at all the angles under the uncovered test and the zero-depth positions of all the frequency points at all the angles under the covered test.
The steps involved in the apparatuses of the above second, third and fourth embodiments correspond to the first embodiment of the method, and the detailed description thereof can be found in the relevant description of the first embodiment. The term "computer-readable storage medium" should be taken to include a single medium or multiple media containing one or more sets of instructions; it should also be understood to include any medium that is capable of storing, encoding or carrying a set of instructions for execution by a processor and that cause the processor to perform any of the methods of the present invention.
Those skilled in the art will appreciate that the modules or steps of the present invention described above can be implemented using general purpose computer means, or alternatively, they can be implemented using program code that is executable by computing means, such that they are stored in memory means for execution by the computing means, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps of them are fabricated into a single integrated circuit module. The present invention is not limited to any specific combination of hardware and software.
EXAMPLE five
According to an aspect of one or more embodiments of the present disclosure, a multi-frequency point dynamic zero search system for radome boresight error testing is provided.
As shown in fig. 1, a multi-frequency-point dynamic zero search system for an antenna cover aiming line error test includes a main control computer, where the main control computer executes the multi-frequency-point dynamic zero search method for the antenna cover aiming line error test, the main control computer is respectively connected with a vector network analyzer and a scanner gantry turntable controller, the vector network analyzer is connected with the scanner gantry turntable controller, the scanner gantry turntable controller is respectively connected with a scanner gantry and a turntable, a transmitting antenna is installed on the scanner gantry, a receiving antenna is installed on the turntable, and the vector network analyzer is respectively connected with the transmitting antenna and the receiving antenna.
In this embodiment, the transmitting antenna is mounted on the gantry, and the receiving antenna is mounted on the turntable; the transmitting antenna, the receiving antenna, a vector network analyzer (vector network for short), a low noise amplifier, a power amplifier and the like form a radio frequency loop.
A radio frequency loop:
the vector network is used as a transmitting and receiving unit of system signals, transmitting signals are output to a power amplifier, the power amplifier outputs to a directional coupler, the signals are divided into two paths through the directional coupler, reference signals at a coupling end are input to the vector network, and an output end is connected with a transmitting antenna; the difference channel of the receiving antenna is connected to the vector network through the low noise amplifier, and the channel is directly connected to the vector network.
Furthermore, the main control computer is respectively connected with the vector network analyzer and the scanner frame turntable controller through the switch;
the vector network analyzer is connected with the transmitting antenna through a power amplifier and a directional coupler in sequence, and the directional coupler is connected with the vector network analyzer;
the receiving antenna and the channel are connected with the vector network analyzer, and the difference channel is connected with the vector network analyzer through a low noise amplifier.
EXAMPLE six
According to an aspect of one or more embodiments of the present disclosure, a multi-frequency point dynamic zero search method for a radome boresight error test is provided.
A multi-frequency point dynamic zero searching method for an antenna housing aiming line error test comprises the following steps:
the main control computer controls the turntable provided with the receiving antenna to move to a zero position through the turntable controller of the scanning frame, and controls the scanning frame to move the transmitting antenna to a calibration position so as to align the transmitting antenna and the receiving antenna geometrically;
the main control computer controls the movement of the scanning frame through a set stroke to obtain a differential channel directional diagram of the receiving antenna according to the set test parameters through the scanning frame rotary table controller, and then controls the scanning frame to move the transmitting antenna to a zero-depth position corresponding to the central frequency point to realize electric axis alignment;
and the main control computer respectively obtains the zero depth positions of all the frequency points at all the angles under the test without the cover and the test with the cover, and calculates the error of the antenna cover aiming line of each frequency point at each angle.
The test flow of the line-of-sight error by adopting the multi-frequency point dynamic zero searching system for testing the error of the antenna cover line-of-sight is shown in fig. 2, and after the rotary table returns to zero, the scanning frame is controlled to move the transmitting antenna to a calibrated position, so that the transmitting and receiving antenna is geometrically aligned. Setting parameters such as zero searching speed, sampling interval, initial termination angle, angle interval, frequency and the like, controlling the travel set by the movement of the scanning frame to obtain a difference channel directional diagram of the antenna, and then moving the transmitting antenna to a zero-depth position corresponding to the central frequency point to realize electric axis alignment. Firstly, carrying out a no-cover test, recording the no-cover zero depth positions of all frequency points at all angles, carrying out a test with a cover after the cover is added, and recording the zero depth positions of all frequency points at all angles, wherein the no-cover and the cover both adopt a dynamic zero searching method. And storing and processing the measured data to obtain the aiming line error.
Dynamic zero search principle:
when the distance between the receiving and transmitting antennas reaches a certain value, the scanning frame drives the antennas to do linear motion, which can be equivalent to circular motion with a very small angle taking the receiving antennas as the circle center,the signal received by the difference channel of the receiving antenna is the difference directional diagram of the antenna, and the process is defined as zero searching of the aiming line error test. Respectively measuring zero depth position X under the condition of no cover by a dynamic zero searching method0And zero depth position X under the condition of cover1The line-of-sight error and the unit angle can be calculated according to the formula (1) by knowing the distance D between the transmitting and receiving antennas.
In the formula:
X0-zero depth position without cover, mm;
X1-zero depth position with cover condition, mm;
d, distance between the transmitting antenna and the receiving antenna, mm;
the normalized difference pattern of the monopulse system seeker antenna is shown in fig. 3, and has obvious monotonicity in a small angle range, and the difference channel pattern of multiple frequency points in the small angle range is shown in fig. 4. For the multi-angle multi-frequency point aiming line error test, before dynamic zero search, geometric alignment and electric axis alignment of a transmitting antenna are firstly carried out, so that the position of the transmitting antenna is near zero depth, and then the dynamic zero search is started.
The flow of the dynamic zero search control algorithm is shown in fig. 5, firstly, the scanning frame is controlled to move in the initial direction, the scanning frame controller periodically sends out pulses to trigger the vector network, the industrial personal computer reads the vector network difference channel data in real time and simultaneously records the position of the corresponding scanning frame, and the amplitude change of each frequency point is judged according to the data of three sampling points. If the amplitudes of all the frequency points are monotonically decreased, the zero-depth positions of all the frequency points are in front of the movement direction, the movement direction is not required to be changed, vector network data are continuously collected until the amplitudes of all the frequency points are monotonically increased, the scanning frame is stopped, zero searching of all the frequency points is completed at the moment, and the position with the minimum amplitude is recorded as the zero-depth position. If the amplitudes of all the frequency points are not monotonically decreased but are monotonically increased, the zero depth position of each frequency point is indicated to be behind the movement direction, and therefore the scanning frame should be stopped and moved reversely until the amplitudes of all the frequency points are monotonically increased, and zero searching is completed. If the amplitude of the existing frequency point is monotonically decreased and the amplitude of the existing frequency point is monotonically increased, the front and back directions of the current position are both zero-depth, and the front zero-depth search is finished and then the reverse search is carried out. After completing zero searching at an angle, the rotary table rotates by an increment until testing at all angles is completed.
According to the dynamic zero search algorithm in one or more embodiments of the present disclosure, key technologies such as servo control, centralized distributed control, adaptive control principle, and real-time data processing are applied, so that not only is the test precision ensured, but also the efficiency is improved, and the rapid zero search of multiple angles and multiple frequency points of the radome is realized.
1. The simultaneous testing of multiple frequency points is effectively realized.
2. The zero searching stroke is effectively and dynamically adjusted, and the zero searching time is shortened.
3. The testing efficiency of the antenna housing aiming line error is effectively improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. A multi-frequency point dynamic zero searching method for an antenna housing aiming line error test is characterized by comprising the following steps:
sending a control instruction for controlling the turntable to move to a zero position and a control instruction for controlling the scanning frame to move the transmitting antenna to a calibration position to a scanning frame turntable controller so as to align the transmitting antenna and the receiving antenna geometrically;
receiving the set test parameters and the travel set by the motion of the scanning frame, sending a control instruction of the travel set by the motion of the scanning frame to a rotary table controller of the scanning frame, and acquiring a difference channel directional diagram of the antenna; generating a control instruction for moving the transmitting antenna to a zero-depth position corresponding to the central frequency point, sending the control instruction to a scanner frame turntable controller, and controlling the scanner frame to align the electric axes of the transmitting and receiving antennas; carrying out zero depth positions of all frequency points at all angles under a coverless test by adopting a dynamic zero searching method; carrying out the zero depth position with the cover of all frequency points under all angles in the test with the cover by adopting a dynamic zero searching method;
the dynamic zero searching method comprises the following specific steps:
sending a control instruction for controlling the scanning frame to move in the initial direction at the set zero searching speed to a scanning frame turntable controller according to the set zero searching speed;
the vector network analyzer is called vector network for short, the scanner frame controller periodically sends out pulses to trigger the vector network, the industrial personal computer reads vector network difference channel data in real time and simultaneously records the position of the corresponding scanner frame, and amplitude change of each frequency point is judged according to data of three sampling points;
determining the position relation between the zero depth position and the movement direction of each frequency point according to the monotonicity of the amplitude change of each frequency point, determining the movement direction, and finishing zero searching of the angle;
sending a control instruction for controlling the rotary table to rotate by an increment to a scanner rotary table controller, and carrying out zero searching at the next angle until all the angle tests are finished;
and respectively acquiring zero depth positions of all frequency points at all angles under the test without a cover and the test with a cover, and calculating the antenna housing aiming line error of each frequency point at each angle.
2. The method according to claim 1, wherein the set test parameters include a null-seeking speed, a sampling interval, a start-stop angle, an angle interval, a frequency, a scanning range of the electric axis alignment, and a scanning interval.
3. The method according to claim 1, wherein the method for dynamically searching for a zero at multiple frequencies in an error test of an antenna cover boresight comprises the following specific steps of determining a position relationship between a zero depth position and a moving direction of each frequency point according to monotonicity of amplitude variation of each frequency point, determining the moving direction, and completing zero searching at the angle:
if the amplitudes of all the frequency points are monotonically decreased, the motion direction is not changed, vector network data are continuously collected until the amplitudes of all the frequency points are monotonically increased, a control instruction for stopping the scanning frame is sent to a scanning frame turntable controller, and the position with the minimum amplitude is recorded as a zero-depth position;
if the amplitudes of all the frequency points are monotonically increased, sending a control instruction for controlling the scanning frame to stop and move reversely to the scanning frame rotary table controller, sending the control instruction for stopping the scanning frame to the scanning frame rotary table controller until the amplitudes of all the frequency points are monotonically increased, and recording the position with the minimum amplitude as a zero-depth position;
if the amplitudes of the frequency points are monotonically decreased and the amplitudes of the frequency points are monotonically increased, the moving direction is not changed until the amplitudes of all the frequency points are monotonically increased, a control instruction for controlling the scanning frame to stop and move reversely is sent to the scanning frame turntable controller, until the amplitudes of all the frequency points are monotonically increased, a control instruction for controlling the scanning frame to stop is sent to the scanning frame turntable controller, and the position with the minimum amplitude is recorded as the zero depth position.
4. A computer-readable storage medium having stored thereon instructions adapted to be loaded by a processor of a terminal device and to execute a method of multi-frequency point dynamic zero search for radome boresight error test according to any one of claims 1-3.
5. An electronic device comprising a processor and a computer-readable storage medium, the processor to implement instructions; a computer-readable storage medium storing instructions adapted to be loaded by a processor and to perform a method of multi-frequency point dynamic zero search for radome boresight error test according to any one of claims 1-3.
6. A multi-frequency-point dynamic zero searching apparatus for an antenna cover aiming line error test, wherein the multi-frequency-point dynamic zero searching method for the antenna cover aiming line error test is based on any one of claims 1 to 3, and comprises:
the geometric alignment module is configured to send a control command for controlling the turntable to move to a zero point position and a control command for controlling the scanning frame to move the transmitting antenna to a calibration position to the scanning frame turntable controller so as to align the transmitting and receiving antennas geometrically;
the electric axis alignment module is configured to receive the set test parameters and the set stroke of the motion of the scanning frame, send a control instruction of the set stroke of the motion of the scanning frame to the scanning frame turntable controller and acquire a difference channel directional diagram of the antenna; generating a control instruction for moving the transmitting antenna to a zero-depth position corresponding to the central frequency point, sending the control instruction to a scanner frame turntable controller, and controlling the scanner frame to align the electric axes of the transmitting and receiving antennas;
the maskless test module is configured to acquire zero depth positions of all frequency points at all angles under the maskless test;
the test module with the cover is configured to obtain zero depth positions of all frequency points at all angles under the test with the cover;
and the aiming line error calculation module is configured to calculate the aiming line error according to the zero-depth positions of all the frequency points at all the angles under the uncovered test and the zero-depth positions of all the frequency points at all the angles under the covered test.
7. A multi-frequency-point dynamic zero search system for testing the boresight error of an antenna housing, which comprises a main control computer, wherein the main control computer executes the multi-frequency-point dynamic zero search method for testing the boresight error of the antenna housing according to any one of claims 1 to 3, a vector network analyzer is connected with a scanner gantry turntable controller, the scanner gantry turntable controller is respectively connected with a scanner gantry and a turntable, a transmitting antenna is installed on the scanner gantry, a receiving antenna is installed on the turntable, and the vector network analyzer is respectively connected with the transmitting antenna and the receiving antenna.
8. The system of claim 7, wherein said host computer is connected to said vector network analyzer and said turret controller through a switch;
the vector network analyzer is connected with the transmitting antenna through a power amplifier and a directional coupler in sequence, and the directional coupler is connected with the vector network analyzer;
the receiving antenna and the channel are connected with the vector network analyzer, and the difference channel is connected with the vector network analyzer through a low noise amplifier.
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| CN110726883B (en) * | 2019-11-21 | 2021-09-10 | 中电科思仪科技股份有限公司 | Antenna test turntable dynamic control method for antenna directional pattern test |
| CN112202509B (en) * | 2020-09-17 | 2022-09-02 | 湖北航天技术研究院总体设计所 | Phased array seeker front end frequency conversion calibration compensation system |
| CN112557798B (en) * | 2020-12-09 | 2023-08-01 | 航天特种材料及工艺技术研究所 | Phased array antenna-radome electrical performance testing device and testing method |
| CN113030600B (en) * | 2021-02-09 | 2022-08-05 | 航天特种材料及工艺技术研究所 | Power regulation-based method and system for quickly measuring aiming error of antenna housing |
| CN113092883B (en) * | 2021-04-12 | 2022-12-27 | 中电科思仪科技股份有限公司 | System and method for testing non-principal plane aiming line error of antenna housing |
| CN113325202B (en) * | 2021-06-04 | 2023-04-14 | 中国航空工业集团公司济南特种结构研究所 | Debugging method for alignment of electric axes of receiving and transmitting antennas |
| CN113625063B (en) * | 2021-08-04 | 2024-01-02 | 上海无线电设备研究所 | Method for evaluating single pulse performance of antenna under complete machine condition |
| CN113866517B (en) * | 2021-09-30 | 2022-04-19 | 北京航空航天大学 | Open field normalized site attenuation automatic test method and device |
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