CN114690165A - Radar area search wave beam arrangement method based on sinusoidal space - Google Patents
Radar area search wave beam arrangement method based on sinusoidal space Download PDFInfo
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
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Abstract
The invention discloses a radar area search beam arrangement method based on a sinusoidal space, which is used for determining a scanning airspace range required by a radar station coordinate system and converting the scanning airspace range into an airspace in a array plane coordinate system through coordinate conversion. And setting different radar beam parameters such as azimuth and elevation ranges of the maximum search area, beam width, beam jump and array surface inclination in the parameter setting area. And converting the space domain in the spherical coordinates of the wavefront into sinusoidal coordinates of the wavefront, and finishing beam arrangement in the sinusoidal coordinates. And calculating the beam number, the beam center pointing direction and the beam sweep loss of all wave positions of the combat airspace through a formula. And after finishing beam arrangement in the sine coordinate system, obtaining beam distribution in the radar station coordinate system through coordinate conversion. The calculation formula is executed according to the technical scheme.
Description
Technical Field
The invention relates to the field of radar information processing, in particular to a radar area search beam arrangement method based on a sinusoidal space.
Background
With the continuous improvement of the performance requirement of the air defense radar, how to effectively improve the search efficiency of the radar in the search range, and the timely and accurate target finding becomes an important index requirement.
The radar searches the space domain, needs to use the minimum beam to completely search the space domain, and the search beam position should be arranged in a sine coordinate system (UV space) in consideration of the factors such as the divergence of the beam. Therefore, the wave position arrangement of the search area in the sine space coordinate system is the most common arrangement mode at present.
The sine arrangement mode comprises the arrangement modes of longitudinal arrangement, overlapping wave position arrangement, low-loss point wave position arrangement and the like, and in the same area range, the number of wave positions in the longitudinal arrangement mode is small, but the coverage rate is low. Overlapping wave position arrangement coverage rate is high, but repeated detection exists, and energy waste is large. The low-loss point wave position arrangement coverage rate is relatively complete, but the redundancy detection is relatively high. In view of the above advantages and disadvantages of the above arrangements, an interleaved wave position arrangement with parameter optimization is proposed.
Disclosure of Invention
The invention aims to provide a region arrangement technology based on a sinusoidal space to solve the problem of effective arrangement of an air defense search region in the existing radar equipment. Considering that the arrangement of the sine space is the current mainstream arrangement mode, an optimization and improvement method based on the sine space arrangement mode is adopted.
The technical problems to be solved by the invention include:
1. how to effectively calculate the radar searching wave position arrangement and improve the searching efficiency;
2. how to realize effective and intuitive display and evaluation of the arrangement effect;
3. how to realize the multiplexing of cross products and how to ensure the invention to have good expandability.
In order to achieve the purpose, the invention provides the following technical scheme:
a radar area search beam arrangement method based on a sinusoidal space is characterized by comprising the following steps:
step 1: determining a scanning airspace range required by a radar station coordinate system, and converting the scanning airspace range into an airspace in a wavefront coordinate system through coordinate conversion; setting different radar beam parameters such as azimuth and elevation ranges of a maximum search area, beam width, beam jump and array surface inclination in a parameter setting area;
step 2: converting the airspace in the spherical coordinates of the array surface into sine coordinates of the array surface, and finishing beam arrangement in the sine coordinates; calculating the wave beam number, the wave beam center pointing direction and the wave beam sweep loss of all wave positions of a combat airspace through a formula;
and step 3: after finishing the wave beam arrangement in the sine coordinate system, obtaining the wave beam distribution in the coordinate system of the radar station through coordinate conversion; the calculation formula is executed according to the technical scheme;
and 4, step 4: and searching beams are used, and in actual use, a user sets a space search area through a display control system. Setting a full airspace scanning model beam queue as (A)i，EI) The scanning range of the user-defined array surface is { (A)LEFT,ETOP)，(ARIGHT,EBOTTOM) Retrieving the intersection of the two areas as an actual search beam; (A)i，EI) The queue is a fixed value and is calculated at the time of program initialization. Adding the position value A of the normal line of the wavefront according to the retrieved wavefront wave position information0And obtaining the actual position of the search beam in the geodetic coordinate system.
The step 1 specifically comprises the following steps: coordinate system definition with radar front center as origin (O)x) Defining the projection of a unit vector on an Xz axis of an antenna array surface as alpha (U), and the projection of the unit vector on a Yz axis of the antenna array surface as beta (V);
the step 2 specifically comprises the following steps: the specific wave position arrangement and coordinate conversion steps are as follows:
the first step is as follows: determining a scanning airspace range required by a radar station coordinate system, and converting the scanning airspace range into an airspace in a matrix surface coordinate system through coordinate conversion;
the second step is that: converting the airspace in the spherical coordinates of the array surface into sine coordinates of the array surface, and finishing beam arrangement in the sine coordinates;
the third step: and after finishing beam arrangement in the sine coordinate system, obtaining beam distribution in the radar station coordinate system through coordinate conversion.
The step 3 specifically comprises the following steps: and (3) specific beam arrangement: in UV space, to ensure that the space is covered, there is a gap between adjacent beams if there is no overlap between beam positions, according to the radar design; to eliminate or reduce such gaps, the beam positions must be staggered with partial overlap;
defining: the beam jump coefficient K is equal to the beam jump Δ θ/beam width θ 0.5;
the leakage factor (g%) is (leakage area/total area of electric scanning space) x 100%.
In order to make the leak gap 0, the beam jump must be less than or equal to the transverse overlap ratio parameter in the transverse direction and less than or equal to the longitudinal overlap ratio parameter in the longitudinal direction, and the parameters can be optimized. The specific implementation process is as follows: arranging azimuth beams according to the initial end of the azimuth of the building area and the crossing degree of the azimuth beams; according to the elevation starting and ending of the building area and the elevation beam degree, the elevation beam degree is arranged;
the wave beam number, the wave beam center pointing direction and the wave beam sweep loss of all wave positions of the combat airspace can be calculated through a formula;
1. total number of wave positions required for elevation coverage:
in the formula, EUIs the highest elevation scan angle in the geodetic coordinate system, EDIs the lowest pitch scan angle of the geodetic coordinate system, T is the inclination angle of the array surface relative to the ground, ζEAs beam pitch overlap factor, BEPitching wave beam width in the array normal direction;
2. beam lower edge pointing of 1 st elevation wave position under array coordinate system
BoL,1＝ED-T
3. Wave beam lower edge pointing of 2 nd elevation wave position under array coordinate system
4. Wave beam lower edge pointing of nth elevation wave position under array coordinate system
Wherein N is 2,3, …, NE。
5. The wave beam center of the nth elevation wave position under the geodetic coordinate system points:
wherein N is 1,2, …, NE。
6. Elevation beam width of nth elevation wave position:
7. the total wave position required by azimuth coverage under the nth elevation wave position:
in the formula, AR(positive) is the rightmost azimuth scanning angle in the geodetic coordinate system, AL(minus) is the leftmost scanning angle in the geodetic coordinate system, generally AR＝-AL，ζAAs beam azimuth overlap factor, BAThe azimuth beam width is the array normal direction;
8. the direction cosine of the mth azimuth beam in the right of the array relative to the horizontal axis under the nth elevation wave position:
wherein m is 1,2, …, NA,n/2，n＝1,2,…,NE。
9. The center of the mth azimuth beam in the right direction of the array points under the nth elevation wave position:
10. the mth azimuth beam width of the array under the nth elevation wave position:
11. the direction cosine of the mth azimuth beam on the right of the array relative to the vertical axis under the nth elevation wave position:
βn,m＝sin(ELn)cos(T)-cos(ELn)cos(AZn,m)sin(T)
12. the sweep angle of the mth azimuth beam on the right of the array relative to the array normal under the nth elevation wave position is as follows:
compared with the prior art, the invention has the remarkable advantages that:
the search efficiency is improved, and when the radar searches the airspace, the minimum wave beam is used for completely searching and covering the airspace; the adaptability to various types of radars is improved, a search range can be freely set, overlapping coefficient parameters are set, a configuration file is generated, and any area in the range can be directly used;
and after the arrangement area is generated, the graphic display is directly carried out and the parameters are checked, so that the parameters can be optimized and adjusted.
Drawings
Fig. 1 is a radar front sinusoidal coordinate system.
Fig. 2 is a beam layout diagram.
Fig. 3 is a technical flow of air defense search arrangement based on a sinusoidal space region.
Wherein: the wave a and elevation beam width and elevation beam jump coefficient are horizontal and vertical beam jumps respectively.
Fig. 4 is a parameter setting example.
Fig. 5 is an example of the beam-scheduling result.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, a radar area search beam arrangement method based on a sinusoidal space includes the following steps:
step 1: determining a scanning airspace range required by a radar station coordinate system, and converting the scanning airspace range into an airspace in a wavefront coordinate system through coordinate conversion; setting different radar beam parameters such as azimuth and elevation ranges of a maximum search area, beam width, beam jump and array surface inclination in a parameter setting area;
step 2: converting the airspace in the spherical coordinates of the array surface into sine coordinates of the array surface, and finishing beam arrangement in the sine coordinates; calculating the wave beam number, the wave beam center pointing direction and the wave beam sweep loss of all wave positions of a combat airspace through a formula;
and step 3: after finishing the wave beam arrangement in the sine coordinate system, obtaining the wave beam distribution in the coordinate system of the radar station through coordinate conversion; the calculation formula is executed according to the technical scheme;
and 4, step 4: and (4) searching beams, and in actual use, setting a space search area by a user through a display control system. Setting a full airspace scanning model beam queue as (A)i，EI) The scanning range of the user-defined array surface is { (A)LEFT,ETOP)，(ARIGHT,EBOTTOM) Retrieving the intersection of the two areas as an actual search beam; (A)i，EI) The queue is a fixed value and is calculated at the time of program initialization. Adding the position value A of the normal line of the wavefront according to the retrieved wavefront wave position information0And obtaining the actual position of the search beam in the geodetic coordinate system.
2. The method for arranging radar area search beams based on the sinusoidal space according to claim 1, wherein step 1 specifically includes the following steps: coordinate system definition with radar front center as origin (O)x) Defining unit vector in daysThe projection of the line array surface Xz axis is alpha (U), and the projection of the unit vector on the antenna array surface Yz axis is beta (V); as shown in fig. 1.
3. The method of claim 1, wherein the step 2 comprises the following steps: the specific wave position arrangement and coordinate conversion steps are as follows:
the first step is as follows: determining a scanning airspace range required by a radar station coordinate system, and converting the scanning airspace range into an airspace in a matrix surface coordinate system through coordinate conversion;
the second step is that: converting the airspace in the spherical coordinates of the array surface into sine coordinates of the array surface, and finishing beam arrangement in the sine coordinates;
the third step: and after finishing beam arrangement in the sine coordinate system, obtaining beam distribution in the radar station coordinate system through coordinate conversion.
4. The method for arranging radar area search beams based on the sinusoidal space according to claim 1, wherein the step 3 specifically includes the following steps: and (3) specific beam arrangement: in UV space, to ensure that the space is covered, there is a gap between adjacent beams if there is no overlap between beam positions, according to the radar design; to eliminate or reduce such gaps, the beam positions must be staggered with partial overlap;
defining: the beam jump coefficient K is equal to the beam jump Δ θ/beam width θ 0.5;
the leakage factor (g%) is (leakage area/total area of electric scanning space) x 100%.
In order to make the leak gap 0, the beam jump must be less than or equal to the transverse overlap ratio parameter in the transverse direction and less than or equal to the longitudinal overlap ratio parameter in the longitudinal direction, and the parameters can be optimized.
5. The method for arranging radar area search beams based on the sinusoidal space according to claim 4, wherein the specific implementation process is as follows: arranging azimuth beams according to the initial end of the azimuth of the building area and the crossing degree of the azimuth beams; according to the elevation starting and ending of the building area and the elevation beam degree, the elevation beam degree is arranged; as shown in fig. 2:
the wave beam number, the wave beam center pointing direction and the wave beam sweep loss of all wave positions of the combat airspace can be calculated through a formula;
1. total number of wave positions required for elevation coverage:
in the formula, EUIs the highest elevation scan angle in the geodetic coordinate system, EDIs the lowest pitch scan angle in the geodetic coordinate system, T is the inclination angle of the array surface relative to the earth, ζEAs beam pitch overlap factor, BEPitching wave beam width in the array normal direction;
2. beam lower edge pointing of 1 st elevation wave position under array coordinate system
BoL,1＝ED-T
3. Wave beam lower edge pointing of 2 nd elevation wave position under array coordinate system
4. Wave beam lower edge pointing of nth elevation wave position under array coordinate system
Wherein N is 2,3, …, NE。
5. The wave beam center of the nth elevation wave position under the geodetic coordinate system points:
wherein N is 1,2, …, NE。
6. Elevation beam width of nth elevation wave position:
7. the total wave position required by azimuth coverage under the nth elevation wave position:
in the formula, AR(positive) is the rightmost azimuth scanning angle in the geodetic coordinate system, AL(minus) is the leftmost scanning angle in the geodetic coordinate system, generally AR＝-AL，ζAAs beam azimuth overlap factor, BAThe azimuth beam width is the array normal direction;
8. the direction cosine of the mth azimuth beam in the right of the array relative to the horizontal axis under the nth elevation wave position:
wherein m is 1,2, …, NA,n/2，n＝1,2,…,NE。
9. The center of the mth azimuth beam in the right direction of the array points under the nth elevation wave position:
10. the mth azimuth beam width of the array under the nth elevation wave position:
11. the direction cosine of the mth azimuth beam in the right direction of the array relative to the vertical axis under the nth elevation wave position:
βn,m＝sin(ELn)cos(T)-cos(ELn)cos(AZn,m)sin(T)
12. the sweep angle of the mth azimuth beam on the right of the array relative to the array normal under the nth elevation wave position is as follows:
although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof.
Claims (5)
1. A radar area search beam arrangement method based on a sinusoidal space is characterized by comprising the following steps:
step 1: determining a scanning airspace range required by a radar station coordinate system, and converting the scanning airspace range into an airspace in a wavefront coordinate system through coordinate conversion; setting different radar beam parameters such as azimuth and elevation ranges of a maximum search area, beam width, beam jump and array surface inclination in a parameter setting area;
step 2: converting the airspace in the spherical coordinates of the array surface into sine coordinates of the array surface, and finishing beam arrangement in the sine coordinates; calculating the wave beam number, the wave beam center pointing direction and the wave beam sweep loss of all wave positions of a combat airspace through a formula;
and 3, step 3: after beam arrangement is completed in a sine coordinate system, beam distribution under a radar station coordinate system can be obtained through coordinate conversion; the calculation formula is executed according to the technical scheme;
and 4, step 4: and (4) searching beams, and in actual use, setting a space search area by a user through a display control system. Setting a full airspace scanning model beam queue as (A)i，EI) The scanning range of the user-defined array surface is { (A)LEFT，ETOP)，(ARIGHT，EBOTTOM) Retrieving the intersection of the two areas as an actual search beam;(Ai，EI) The queue is a fixed value and is calculated at the time of program initialization. Adding the position value A of the normal line of the wavefront according to the retrieved wavefront wave position information0And obtaining the actual position of the search beam in the geodetic coordinate system.
2. The method for arranging radar area search beams based on the sinusoidal space according to claim 1, wherein the step 1 specifically includes the following steps: coordinate system definition with radar front center as origin (O)x) The projection of the unit vector on the Xz axis of the antenna array is defined as α (U), and the projection of the unit vector on the Yz axis of the antenna array is defined as β (V).
3. The method of claim 1, wherein the step 2 comprises the following steps: the specific wave position arrangement and coordinate conversion steps are as follows:
the first step is as follows: determining a scanning airspace range required by a radar station coordinate system, and converting the scanning airspace range into an airspace in a wavefront coordinate system through coordinate conversion;
the second step is that: converting the airspace in the spherical coordinates of the array surface into sine coordinates of the array surface, and finishing beam arrangement in the sine coordinates;
the third step: and after finishing beam arrangement in the sine coordinate system, obtaining beam distribution in the radar station coordinate system through coordinate conversion.
4. The method for arranging radar area search beams based on the sinusoidal space according to claim 1, wherein the step 3 specifically includes the following steps: and (3) specific beam arrangement: in UV space, to ensure that the space is covered, there is a gap between adjacent beams if there is no overlap between beam positions, according to the radar design; to eliminate or reduce such gaps, the beam positions must be staggered with partial overlap;
defining: the beam jump coefficient K is the beam jump Δ θ/beam width θ 0.5;
the leakage factor (g%) is (leakage area/total area of electric scanning space) multiplied by 100%.
In order to make the leak gap 0, the beam jump must be less than or equal to the transverse overlap ratio parameter in the transverse direction and less than or equal to the longitudinal overlap ratio parameter in the longitudinal direction, and the parameters can be optimized.
5. The method for arranging radar area search beams based on the sinusoidal space according to claim 4, wherein the specific implementation process is as follows: arranging azimuth beams according to the initial end of the azimuth of the building area and the crossing degree of the azimuth beams; according to the elevation starting and ending of the building area and the elevation beam degree, the elevation beam degree is arranged;
the wave beam number, the wave beam center pointing direction and the wave beam sweep loss of all wave positions of the combat airspace can be calculated through a formula;
1. total number of wave positions required for elevation coverage:
in the formula, EUIs the highest elevation scan angle in the geodetic coordinate system, EDIs the lowest pitch scan angle in the geodetic coordinate system, T is the inclination angle of the array surface relative to the earth, ζEAs beam pitch overlap factor, BEPitching wave beam width in the array normal direction;
2. beam bottom edge pointing of 1 st elevation wave position under array coordinate system
BoL，1＝ED-T
3. Beam bottom edge pointing of 2 nd elevation wave position under array coordinate system
4. Wave beam lower edge pointing of nth elevation wave position under array coordinate system
Wherein N is 2,3, …, NE。
5. The wave beam center of the nth elevation wave position under the geodetic coordinate system points:
wherein N is 1,2, …, NE。
6. Elevation beam width of nth elevation wave position:
7. the total wave position required by azimuth coverage under the nth elevation wave position:
in the formula, AR(positive) is the rightmost azimuth scanning angle in the geodetic coordinate system, AL(minus) is the leftmost scanning angle in the geodetic coordinate system, and generally has AR＝-AL，ζAAs beam azimuth overlap factor, BAThe azimuth beam width is the array normal direction;
8. the direction cosine of the mth azimuth beam in the right of the array relative to the horizontal axis under the nth elevation wave position:
wherein m is 1,2, …, NA，n/2，n＝1，2，…，NE。
9. The center of the mth azimuth beam in the right direction of the array points under the nth elevation wave position:
10. the mth azimuth beam width of the array under the nth elevation wave position:
11. the direction cosine of the mth azimuth beam on the right of the array relative to the vertical axis under the nth elevation wave position:
βn，m＝sin(ELn)cos(T)-cos(ELn)cos(AZn，m)sin(T)
12. the sweep angle of the mth azimuth beam on the right of the array relative to the array normal under the nth elevation wave position is as follows:
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116070465A (en) * | 2023-03-07 | 2023-05-05 | 天地信息网络研究院(安徽)有限公司 | Space wave position design method based on overlap ratio optimization |
| CN117368867A (en) * | 2023-11-10 | 2024-01-09 | 北方工业大学 | Method and system for searching beam irradiation area of flight carrier oriented to attitude change |
-
2020
- 2020-12-28 CN CN202011576844.2A patent/CN114690165A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116070465A (en) * | 2023-03-07 | 2023-05-05 | 天地信息网络研究院(安徽)有限公司 | Space wave position design method based on overlap ratio optimization |
| CN116070465B (en) * | 2023-03-07 | 2023-06-02 | 天地信息网络研究院(安徽)有限公司 | Space wave position design method based on overlap ratio optimization |
| CN117368867A (en) * | 2023-11-10 | 2024-01-09 | 北方工业大学 | Method and system for searching beam irradiation area of flight carrier oriented to attitude change |
| CN117368867B (en) * | 2023-11-10 | 2024-05-03 | 北方工业大学 | Method and system for searching beam irradiation area of flight carrier oriented to attitude change |
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