CN117080743A - Method and system for calibrating pointing angle of mechanically-scanned phase-scanned antenna - Google Patents
Method and system for calibrating pointing angle of mechanically-scanned phase-scanned antenna Download PDFInfo
- Publication number
- CN117080743A CN117080743A CN202310862504.3A CN202310862504A CN117080743A CN 117080743 A CN117080743 A CN 117080743A CN 202310862504 A CN202310862504 A CN 202310862504A CN 117080743 A CN117080743 A CN 117080743A
- Authority
- CN
- China
- Prior art keywords
- antenna
- coordinate system
- scanning
- pointing
- rotating shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000003287 optical effect Effects 0.000 claims abstract description 89
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 239000013598 vector Substances 0.000 claims description 110
- 238000005259 measurement Methods 0.000 claims description 51
- 238000012360 testing method Methods 0.000 claims description 39
- 239000011159 matrix material Substances 0.000 claims description 31
- 238000012546 transfer Methods 0.000 claims description 31
- 239000000523 sample Substances 0.000 claims description 28
- 238000010408 sweeping Methods 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 13
- 238000012937 correction Methods 0.000 claims description 11
- 238000000691 measurement method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 7
- 238000004088 simulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000036544 posture Effects 0.000 description 2
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/267—Phased-array testing or checking devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/125—Means for positioning
- H01Q1/1264—Adjusting different parts or elements of an aerial unit
-
- 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
- H01Q1/288—Satellite antennas
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The application provides a method and a system for calibrating a pointing angle of a mechanically scanned phase scanned antenna, which relate to the technical field of antenna assembly and comprise the following steps: the method comprises the steps of setting the spatial relationship between an antenna and a measuring system, calibrating an antenna optical reference and an antenna measuring system reference, calibrating the direction of an antenna electric scanning rotating shaft, calibrating the direction of an antenna machine scanning rotating shaft, calibrating an antenna machine scanning, correcting the verticality of the electric scanning rotating shaft, calibrating an antenna pointing coordinate system and calibrating the antenna pointing coordinate system and a satellite reference coordinate system, and provides an antenna pointing angle calibrating method combining a one-dimensional mechanism with a one-dimensional electric scanning.
Description
Technical Field
The application relates to the technical field of antenna assembly, in particular to a method and a system for calibrating a pointing angle of a mechanically-scanned phase-scanned antenna.
Background
Antennas occupy a very important position in satellite systems, and are mainly used for completing satellite data transmission or tracking and pointing of targets. With the rapid development of the technical level and satellite load, the remote sensing resolution of the satellite is rapidly improved, the load data rate is larger and larger, the effective load working time is longer and longer, higher requirements are put on the data transmission rate, and under the condition that the output power of the satellite energy source and the power amplifier is limited, the high-gain spot beam antenna is inevitably selected. The currently used antenna pointing scheme comprises two-dimensional mechanism pointing schemes, two-dimensional electric scanning pointing schemes, mechanical scanning electric scanning pointing schemes and the like, wherein the two-dimensional mechanism pointing schemes have low power consumption, but are difficult to use when the product height is large and the installation space is limited, the two-dimensional electric scanning pointing schemes have low product height, but have high cost and high power consumption, and the mechanical scanning electric scanning schemes have the characteristics of product height, cost and moderate power consumption and become an alternative scheme under the condition of limited product power consumption in the installation space at present.
With the continuous improvement of the data transmission rate, the caliber of the satellite-borne antenna is larger and larger, the wave beam is narrower and narrower, and higher requirements are put on the pointing precision of the antenna. Due to the influences of factors such as antenna processing and assembly errors, deviation of an antenna pointing coordinate system and an optical reference coordinate system and installation errors of antenna satellite mounting can be caused, and the pointing accuracy of the antenna can be influenced. In addition, the machine-scanning electric scanning combined pointing mode is adopted, the electric scanning rotating shaft coordinate system cannot be directly measured, meanwhile, errors exist in the adhesion of the optical prism, and the machine-scanning rotating shaft coordinate system cannot be directly obtained. In order to meet the on-orbit precise pointing requirement of the mechanical scanning phase scanning antenna, the mechanical scanning phase scanning antenna pointing angle calibration method is provided, the calibration of an antenna pointing coordinate system is realized, the antenna pointing precision is improved, and satellite data transmission is ensured.
Currently, two-dimensional mechanism pointing and phased array antennas are applied more in the satellite field, and methods for calibrating the pointing angle of an antenna system are proposed, such as a method for quickly measuring the mechanical pointing precision of a satellite-borne antenna, a method for optically calibrating the system and the calibrating method thereof by an electric axis of a satellite-borne microwave tracking radar, a device for calibrating the pointing angle of a directional microwave antenna, a method for calibrating and using the same, a mechanical phased-array antenna and a beam pointing control method thereof, a method for calibrating the pointing angle of a subarray beam of a distributed phased-array antenna, and the like, and a method for automatically realizing the pointing calibration of a remote dual-antenna pointing calibration method (publication 61-1420/TN) and a three-axis antenna pointing calibration method (publication 53-1189/P) and a three-axis antenna angle calibration method (publication 61-1224/TN) and a method for calibrating an X-Y antenna base (publication 13-1099/TN) are proposed, but the pointing angle calibration device, calibration method and the method of a two-dimensional mechanism pointing and the two-dimensional antenna and the beam pointing angle calibration method are not used in phased-array antenna system combined with a phased-array antenna.
The application patent with the publication number of CN107121124B discloses a quick measurement method for the mechanical pointing precision of a satellite-borne antenna, which is characterized in that a camera is utilized to shoot an antenna array surface so as to quickly obtain the coordinates of reflecting mark points, the coordinates are converted to the position under a coordinate system of a theodolite measurement system through common mark points and are fitted with the normal line of the antenna array surface, a satellite reference prism is measured through collimation of the theodolite, the angular relation between the theodolites is obtained through mutual aiming, and finally, the mechanical pointing precision of the normal line of the antenna array surface and the satellite coordinate system is calculated, so that the requirement for quick measurement of the mechanical pointing precision of a large-size antenna is met. The application finally obtains the relation between the normal vector of the antenna array surface and the satellite coordinate system, does not relate to the calibration of the mechanical rotating shaft and the electric scanning rotating shaft of the antenna, the calibration of the antenna pointing coordinate system and the satellite coordinate system, and the like, and can not solve the problem of high-precision pointing calibration of the electric scanning pointing antenna of the machine scanning.
The application patent with publication number of CN103454619B discloses an electric axis optical calibration system of a satellite-borne microwave tracking radar and a calibration method thereof, wherein the calibration system comprises a radar test subsystem, a calibration subsystem, a radar device and a target simulation subsystem; the target simulation subsystem comprises a target simulation source, a two-dimensional test turntable controller connected with the two-dimensional test turntable, a two-dimensional scanning frame and a target model horn antenna arranged on the two-dimensional scanning frame. The calibration method comprises the following steps: step 1, calibrating the installation precision of a radar antenna and a driving mechanism; step 2, calibrating the consistency of a radar electric axis and a radar antenna mechanical axis; and 3, calibrating the radar according to the calibration result. The application finally carries out calibration on the relation between the mechanical axis and the optical axis of the radar antenna, does not relate to the calibration of the mechanical rotating shaft and the electric scanning rotating shaft of the antenna, the calibration of an antenna pointing coordinate system and a satellite coordinate system, and the like, and can not solve the problem of high-precision pointing calibration of the electric scanning pointing antenna of the machine scanning.
The application patent with publication number of CN105140648B discloses a directional microwave antenna pointing angle calibration device, a calibration method and a use method, wherein a double-shaft turntable, an antenna bracket, a directional antenna and an infrared laser aiming component are arranged; the infrared laser aiming component is used as a reference for antenna aiming, so that the accurate calibration of the directional microwave antenna pointing angle calibration device is realized, but the device cannot be suitable for antenna pointing angle calibration under the combination of a one-dimensional mechanism and one-dimensional electric scanning.
The application patent with publication number of CN102868028B discloses a mechanical phased scanning array antenna and a beam pointing control method thereof, which comprises an antenna array formed by N circularly polarized antenna units, a power divider network and coaxial lines, wherein each circularly polarized antenna unit is arranged on a rotating device, the angle posture of each circularly polarized antenna unit is controlled through the rotation of the rotating device, the phase configuration of the antenna array is realized by the phase corresponding to different angle postures of each circularly polarized antenna unit, the beam pointing of the antenna array is controlled, and the phased beam scanning function of the antenna array is realized. This solution does not relate to the relevant content of antenna pointing calibration, nor is it mentioned how to ensure the pointing accuracy of the antenna at the platform.
The application patent with publication number CN103471563B discloses a subarray beam pointing angle correction method of a distributed phased array antenna, which comprises the following implementation steps: 1) The subarrays provided with the electronic compass are arranged on the aircraft wing; 2) Establishing a fuselage coordinate system, an earth coordinate system and a subarray coordinate system; 3) Calculating the coordinates of the satellite in a coordinate system of the aircraft body by utilizing satellite angle parameters provided by the flight control system; 4) Calculating coordinates of the satellite in an earth coordinate system by using the attitude parameters of the machine body; 5) The electronic compass on the subarray measures the attitude parameter of the subarray; 6) Calculating coordinates of the satellite in a subarray coordinate system by using attitude parameters on the subarrays; 7) The coordinates of the satellite on the subarray coordinate system are converted into pitch and azimuth angles of the satellite relative to the subarrays. The correction method is suitable for a distributed phased array antenna in airborne satellite communication, and provides a flow and a scheme for calculating an antenna angle, and the pointing precision deviation and the correction method caused by factors such as antenna installation are not considered.
The application patent with the publication number of CN107367258B discloses a method for determining the pointing precision of a two-dimensional movable spot beam antenna, wherein the pointing precision of the two-dimensional movable spot beam antenna is divided into a direction angle calculation error and an antenna mechanism error, the direction angle calculation error comprises a track determination error, a time unification error, an attitude determination error and a software algorithm error, the antenna mechanism error comprises a transmission error, a measurement error, a thermal deformation error and an assembly error, then the influences of the track determination error, the time unification error, the attitude determination error and the software algorithm error on the direction angle calculation error are respectively calculated, the direction angle calculation error is further obtained, and finally the antenna mechanism error is obtained by calculating the influence of the transmission error, the measurement error, the thermal deformation error and the assembly error on the antenna mechanism error, and further the pointing precision of the antenna is obtained. The application does not mention the scheme of precision calibration, and cannot be applied to the calibration of the antenna pointing angle by combining a one-dimensional mechanism and a one-dimensional electric scanning.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides a method and a system for calibrating the pointing angle of a mechanically scanned phase-scanned antenna.
The application provides a method and a system for calibrating a pointing angle of a mechanically scanned phase scanned antenna, wherein the scheme is as follows:
in a first aspect, a method for calibrating a pointing angle of a mechanically scanned phase scanned antenna is provided, the method comprising:
setting the spatial relation between the antenna and the measuring system: adopting a plane near field test system to set the relative position relation between the antenna and the measurement system;
calibrating an antenna optical reference and an antenna measurement system reference: acquiring the representation of a scanning frame coordinate system in a theodolite coordinate system, and acquiring the representation of an optical coordinate system represented by an antenna prism surface normal in the theodolite coordinate system to obtain a transfer matrix of the antenna optical prism coordinate system relative to the antenna scanning frame coordinate system;
calibrating the direction of the electric scanning rotating shaft of the antenna: setting different machine-scan pointing angles, obtaining the representation of the maximum vector of the antenna pattern under a plurality of angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the electric-scan rotating shaft of the antenna through vector calculation;
calibrating the direction of the scanning rotating shaft of the antenna machine: setting different electric scanning pointing angles, obtaining the representation of the maximum vector of the antenna pattern under a plurality of mechanical angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the scanning rotating shaft of the antenna machine through vector calculation;
and correcting the verticality of the rotating shaft of the antenna machine and the electric scanning: checking whether the two rotating shaft directions are vertical or not, and if the deviation affects the pointing precision of the antenna, performing self-installation correction of the antenna to realize the vertical of the machine-sweeping and electric-sweeping rotating shafts;
calibrating an antenna pointing coordinate system: obtaining the relation of an antenna pointing coordinate system in an antenna scanning coordinate system according to the antenna electric scanning rotating shaft direction calibration and the machine scanning rotating shaft direction calibration results, and obtaining the representation of the antenna pointing coordinate system in the antenna optical reference according to the relation between the antenna optical reference and the antenna measuring system reference;
calibrating an antenna pointing coordinate system and a satellite reference coordinate system: after the antenna is mounted on the satellite, a transfer matrix of the antenna optical coordinate system relative to the whole satellite reference coordinate system is obtained, and the antenna pointing coordinate system and the satellite reference coordinate system are obtained by taking the antenna optical coordinate system as an intermediary.
Preferably, the step of setting the spatial relationship between the antenna and the measurement system specifically includes: and (3) adopting a planar near-field test system, placing the antenna array surface opposite to the scanning surface of the antenna scanning system, setting the distance from the antenna surface to the scanning probe by considering relevant factors including the working frequency band of the antenna, the caliber of the antenna and the scanning rotation range of the machine, determining that the requirements of near-field test conditions are met, and carrying out antenna pattern test after the setting is completed.
Preferably, the step of calibrating the antenna optical reference and the antenna measurement system reference specifically includes: attaching targets on a scanning frame probe of an antenna near-field test system, controlling the probe to translate in an X axis and a Y axis through the antenna test system, measuring a plurality of probe positions through a first theodolite and a second theodolite by using a front intersection measurement method after translating, obtaining a scanning frame coordinate system, and calibrating an angle transfer matrix of the scanning frame coordinate system relative to the theodolite coordinate system; and then, obtaining the representation of the antenna optical prism coordinate system in the theodolite coordinate system by adopting an optical collimation measurement method, and obtaining a transfer matrix of the antenna optical prism coordinate system relative to the scanning frame coordinate system by taking the theodolite coordinate system as an intermediary.
Preferably, the step of calibrating the direction of the electric scanning rotating shaft of the antenna specifically comprises the following steps: the antenna machine scanning angle is maintained at 0 degree, different electric scanning pointing angles are set through an antenna controller, an antenna mechanism is controlled to mechanically rotate, measurement is carried out at a plurality of electric scanning angles, the representation of the maximum direction vector of the antenna pattern in a scanning coordinate system of an antenna measurement system under the plurality of electric scanning angles is obtained, an electric scanning rotating shaft is perpendicular to the three vectors, and the representation of the antenna electric scanning rotating shaft vector is obtained according to vector operation and right-hand rule.
Preferably, the step of calibrating the direction of the scanning rotating shaft of the antenna specifically comprises the following steps: the electric scanning angle is maintained to be 0 degree, different machine scanning pointing angles are set through the antenna controller, the antenna controller is controlled to mechanically rotate, measurement is carried out at a plurality of machine scanning angles, the representation of the maximum direction vector of the antenna pattern under the plurality of machine scanning angles in the scanning coordinate system of the antenna measuring system is obtained, the machine scanning rotating shaft is perpendicular to the three vectors, and the vector representation of the antenna machine scanning rotating shaft is obtained according to vector operation and right-hand rule.
Preferably, the step of correcting the verticality of the rotating shaft of the antenna machine sweeping and the electric sweeping comprises the following steps: and checking whether the two rotating shaft directions are vertical according to the obtained electric and electric scanning vector representations of the antenna, and if the two rotating shaft directions are vertical, the antenna is corrected by a related mode including installation and adjustment of the antenna on the mechanical rotating shaft, so that the vertical of the electric and electric scanning rotating shafts of the antenna is finally realized, and the final electric and electric scanning rotating shaft vectors of the antenna, namely the antenna pointing coordinate system, are obtained.
Preferably, the step of calibrating the antenna pointing coordinate system and the satellite reference coordinate system includes: after the antenna is mounted to a satellite, a transfer matrix of an antenna optical coordinate system relative to a whole satellite reference coordinate system is obtained by measuring the reference relation between the antenna optical reference and a satellite body, and the antenna optical coordinate system is used as an intermediary, so that the relation between an antenna pointing coordinate system and the satellite reference coordinate system is obtained;
and when the antenna is pointed, finally obtaining a pointing vector when the antenna points to the target, further obtaining a pointing angle, and controlling the antenna to point.
In a second aspect, a pointing angle calibration system for a mechanically scanned phase scanned antenna is provided, the system comprising:
the spatial relation setting module of the antenna and the measuring system: adopting a plane near field test system to set the relative position relation between the antenna and the measurement system;
antenna optical reference and antenna measurement system reference calibration module: acquiring the representation of a scanning frame coordinate system in a theodolite coordinate system, and acquiring the representation of an optical coordinate system represented by an antenna prism surface normal in the theodolite coordinate system to obtain a transfer matrix of the antenna optical prism coordinate system relative to the antenna scanning frame coordinate system;
the antenna electric scanning rotating shaft direction calibration module comprises an antenna electric scanning rotating shaft direction calibration module: setting different machine-scan pointing angles, obtaining the representation of the maximum vector of the antenna pattern under a plurality of angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the electric-scan rotating shaft of the antenna through vector calculation;
the antenna machine sweeping rotating shaft direction calibration module comprises: setting different electric scanning pointing angles, obtaining the representation of the maximum vector of the antenna pattern under a plurality of mechanical angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the scanning rotating shaft of the antenna machine through vector calculation;
antenna machine sweeps, electricity sweeps pivot straightness correction module that hangs down: checking whether the two rotating shaft directions are vertical or not, and if the deviation affects the pointing precision of the antenna, performing self-installation correction of the antenna to realize the vertical of the machine-sweeping and electric-sweeping rotating shafts;
antenna pointing coordinate system calibration module: obtaining the relation of an antenna pointing coordinate system in an antenna scanning coordinate system according to the antenna electric scanning rotating shaft direction calibration and the machine scanning rotating shaft direction calibration results, and obtaining the representation of the antenna pointing coordinate system in the antenna optical reference according to the relation between the antenna optical reference and the antenna measuring system reference;
the antenna pointing coordinate system and satellite reference coordinate system calibration module: after the antenna is mounted on the satellite, a transfer matrix of the antenna optical coordinate system relative to the whole satellite reference coordinate system is obtained, and the antenna pointing coordinate system and the satellite reference coordinate system are obtained by taking the antenna optical coordinate system as an intermediary.
Preferably, the spatial relationship setting module of the antenna and the measurement system specifically includes: and (3) adopting a planar near-field test system, placing the antenna array surface opposite to the scanning surface of the antenna scanning system, setting the distance from the antenna surface to the scanning probe by considering relevant factors including the working frequency band of the antenna, the caliber of the antenna and the scanning rotation range of the machine, determining that the requirements of near-field test conditions are met, and carrying out antenna pattern test after the setting is completed.
Preferably, the step of calibrating the antenna optical reference and the antenna measurement system reference specifically includes: attaching targets on a scanning frame probe of an antenna near-field test system, controlling the probe to translate in an X axis and a Y axis through the antenna test system, measuring a plurality of probe positions through a first theodolite and a second theodolite by using a front intersection measurement method after translating, obtaining a scanning frame coordinate system, and calibrating an angle transfer matrix of the scanning frame coordinate system relative to the theodolite coordinate system; then, an optical collimation measurement method is adopted to obtain the representation of the antenna optical prism coordinate system in the theodolite coordinate system, and the theodolite coordinate system is used as an intermediary to obtain a transfer matrix of the antenna optical prism coordinate system relative to the scanning frame coordinate system;
the antenna electric scanning rotating shaft direction calibration step specifically comprises the following steps: the scanning angle of the antenna is maintained at 0 DEG, different electric scanning pointing angles are set through an antenna controller, an antenna mechanism is controlled to mechanically rotate, measurement is carried out at a plurality of electric scanning angles, the representation of the maximum direction vector of the antenna pattern in a scanning coordinate system of an antenna measuring system under the plurality of electric scanning angles is obtained, an electric scanning rotating shaft is perpendicular to the three vectors, and the representation of the electric scanning rotating shaft vector of the antenna is obtained according to vector operation and right-hand rule;
the antenna machine sweeping rotating shaft direction calibration step specifically comprises the following steps: the electric scanning angle is maintained to be 0 degree, different machine scanning pointing angles are set through an antenna controller, the antenna controller is controlled to mechanically rotate, measurement is carried out at a plurality of machine scanning angles, the representation of the maximum direction vector of the antenna pattern under the plurality of machine scanning angles in a scanning coordinate system of an antenna measuring system is obtained, a machine scanning rotating shaft is perpendicular to the three vectors, and the vector representation of the antenna machine scanning rotating shaft is obtained according to vector operation and right-hand rule;
the antenna machine scanning and electric scanning rotating shaft verticality correction step comprises the following steps: checking whether two rotating shaft directions are vertical according to the obtained electric scanning and electric scanning vector representation of the antenna, if a certain deviation affects the pointing precision of the antenna, correcting by a related mode including installation and adjustment of the antenna on a mechanical rotating shaft, finally realizing the vertical of the electric scanning and electric scanning rotating shaft, and obtaining final electric scanning and electric scanning rotating shaft vectors of the antenna, namely an antenna pointing coordinate system;
the calibration step of the antenna pointing coordinate system and the satellite reference coordinate system comprises the following steps: after the antenna is mounted to a satellite, a transfer matrix of an antenna optical coordinate system relative to a whole satellite reference coordinate system is obtained by measuring the reference relation between the antenna optical reference and a satellite body, and the antenna optical coordinate system is used as an intermediary, so that the relation between an antenna pointing coordinate system and the satellite reference coordinate system is obtained;
and when the antenna is pointed, finally obtaining a pointing vector when the antenna points to the target, further obtaining a pointing angle, and controlling the antenna to point.
Compared with the prior art, the application has the following beneficial effects:
1. the application provides a method for calibrating an antenna pointing angle by combining a one-dimensional mechanism with a one-dimensional electric scanning, and the combined antenna of the machine scanning has the advantages of small physical size envelope, low power consumption and the like compared with a two-dimensional phased array antenna, and gradually starts to be applied in a satellite system;
2. the application provides the calibration method of the phased array coordinate system and the calibration method of the antenna pointing deviation on the basis of considering factors such as mechanism pointing error, so as to realize the calibration of the antenna pointing coordinate system, ensure the antenna pointing precision, ensure and meet the transmission of data, and be applied to the pointing calibration of the antenna in the future.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic calibration diagram of a relationship between a near field scanning coordinate system and a theodolite;
fig. 2 is a schematic calibration diagram of the relationship between the antenna optical prism coordinate system and theodolite and the relationship between the near field scanning probe and the antenna space placement.
Detailed Description
The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.
The embodiment of the application provides a method for calibrating a pointing angle of a mechanically scanned phase scanned antenna, which is shown by referring to fig. 1 and 2, and specifically comprises the following steps: and a planar near-field test system is adopted, an antenna array surface is placed opposite to a scanning surface of an antenna scanning system, the distance from the antenna surface to a scanning probe is set in consideration of an antenna working frequency band, an antenna caliber, a scanning rotation range and the like, the near-field test condition requirement is met, and an antenna pattern test is carried out after the setting is completed.
Calibrating an antenna optical reference and an antenna measurement system reference: and attaching a target on a scanning frame probe of the antenna near-field test system, acquiring the representation of a scanning frame coordinate system in a theodolite coordinate system by adopting a front intersection measurement method, acquiring the representation of an optical coordinate system represented by the normal line of an antenna prism surface in the theodolite coordinate system by adopting optical collimation measurement, and further acquiring a transfer matrix of the antenna optical prism coordinate system relative to the antenna scanning frame coordinate system.
Specifically, in the step, a target is attached to a scanning frame probe of an antenna near-field test system, the antenna test system controls the probe to translate in an X-axis and a Y-axis, a front intersection measuring method is adopted after translation, 3 probe positions are measured through a theodolite 1 and a theodolite 2 in a standing mode, a scanning frame coordinate system is obtained, an angle transfer matrix of the scanning frame coordinate system relative to the theodolite coordinate system is calibrated, then an optical collimation measuring method is adopted, the representation of an antenna optical prism coordinate system in the theodolite coordinate system is obtained, the theodolite coordinate system is used as an intermediary, and then a transfer matrix of the antenna optical prism coordinate system relative to the scanning frame coordinate system is obtained.
Calibrating the direction of the electric scanning rotating shaft of the antenna: different electric scanning pointing angles are set, the representation of the maximum vector of the antenna pattern under 3 angles in the scanning coordinate system of the antenna measurement system is obtained, and the vector representation of the electric scanning rotating shaft of the antenna is obtained through vector calculation. Specifically, the scanning angle of the antenna is maintained at 0 degrees, different electric scanning pointing angles are set through an antenna controller, measurement is carried out at 3 electric scanning angles of 10 degrees, 0 degrees, 10 degrees and the like, the representation of the maximum direction vector of the antenna pattern in the scanning coordinate system of the antenna measuring system under the 3 electric scanning angles is obtained, the electric scanning rotating shaft is perpendicular to the three vectors, and the vector representation of the antenna electric scanning rotating shaft is obtained according to vector operation and right-hand rule.
Calibrating the direction of the scanning rotating shaft of the antenna machine: and setting different machine-sweeping pointing angles, obtaining the representation of the maximum vector of the antenna pattern under 3 mechanical angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the machine-sweeping rotating shaft of the antenna through vector calculation. Specifically, the electric scanning angle is maintained to be 0 degree, different machine scanning pointing angles are set through the antenna controller, the antenna controller is controlled to mechanically rotate, 3 machine scanning angles such as 10 degrees, 0 degrees, 10 degrees and the like are measured, the representation of the maximum direction vector of the antenna pattern under the 3 machine scanning angles in the scanning coordinate system of the antenna measuring system is obtained, the machine scanning rotating shaft is perpendicular to the three vectors, and the vector representation of the antenna machine scanning rotating shaft is obtained according to vector operation and right-hand rule.
And correcting the verticality of the rotating shaft of the antenna machine and the electric scanning: under normal conditions, the vertical direction of the electric scanning and mechanical scanning rotating shafts of the antenna can be ensured through machining, active antenna assembly and the like, and the pointing requirement can be met. According to the obtained electric and electric scanning vector representation of the antenna, whether the two rotating shaft directions are vertical or not can be checked, if a certain deviation influences the antenna pointing accuracy, the antenna is corrected in a mode of installing and adjusting the antenna on a mechanical rotating shaft and the like, the vertical of the electric and electric scanning rotating shafts is finally realized, and the final electric and electric scanning rotating shaft vector of the antenna, namely the antenna pointing coordinate system, is obtained.
Calibrating an antenna pointing coordinate system: and according to vector representation of the scanning coordinate system of the antenna measuring system and the antenna machine scanning and electric scanning rotating shafts, and according to the relation between the antenna optical reference and the antenna measuring system reference, obtaining representation of the antenna pointing coordinate system in the antenna optical coordinate system.
Calibrating an antenna pointing coordinate system and a satellite reference coordinate system: after the antenna is mounted to a satellite, a transfer matrix of an antenna optical coordinate system relative to a whole satellite reference coordinate system is obtained by measuring the reference relation between the antenna optical reference and the satellite body, the antenna optical coordinate system is used as an intermediary, the relation between an antenna pointing coordinate system and the satellite reference coordinate system is further obtained, and when the antenna is pointed, a pointing vector when the antenna points to a target is finally obtained, and then a pointing angle is obtained, so that the antenna is controlled to point, and the accurate pointing of the antenna is realized.
Next, the present application will be described in more detail.
Referring to fig. 1 and 2, a plane near field test system is adopted, and the relative position relationship between an antenna surface and a measurement system is set by considering the working frequency band of the antenna, the caliber of the antenna, the rotation range of the machine sweep and the like; attaching a target on a scanning frame probe of an antenna near-field test system, acquiring the representation of a scanning frame coordinate system in a theodolite coordinate system by adopting a front intersection measurement method, acquiring the representation of an optical coordinate system represented by the normal line of an antenna prism surface in the theodolite coordinate system by adopting optical collimation measurement, and further acquiring a transfer matrix of the antenna optical prism coordinate system relative to the antenna scanning frame coordinate system; setting different electric scanning pointing angles, obtaining the representation of the maximum vector of the antenna pattern under 3 electric scanning angles in the scanning coordinate system of the antenna measurement system, and obtaining the representation of the antenna electric scanning rotating shaft vector; setting different machine-scanning pointing angles, obtaining the representation of the maximum vector of the antenna pattern under 3 machine-scanning angles in the scanning coordinate system of the antenna measurement system, and obtaining the representation of the vector of the antenna machine-scanning rotating shaft; checking whether the direction of the electric scanning rotating shaft of the machine is vertical or not, if a certain deviation exists, correcting, and finally realizing that the electric scanning rotating shaft of the machine is vertical; according to the reference relation between the antenna optical reference and the antenna measurement system, obtaining the representation of the antenna pointing coordinate system in the antenna optical reference; after the antenna is mounted to the satellite, the optical coordinate system of the antenna and the reference coordinate system of the satellite are measured, and the relationship between the pointing coordinate system of the antenna and the reference coordinate system of the satellite is obtained, so that the precise pointing of the antenna is realized.
Taking the convenience and accuracy of measurement into consideration, a planar near field test system is adopted, a near field measurement probe is utilized to scan in a plane with a certain distance from an antenna to be measured, the amplitude-phase distribution on discrete points is obtained, and the far field characteristic of the antenna is obtained through calculation and deduction; in the test, the antenna array surface is placed opposite to the scanning surface of the antenna scanning system, the distance from the antenna surface to the scanning probe is set in consideration of the working frequency band of the antenna, the caliber of the antenna, the rotation range of the machine sweep and the like, and the antenna pattern test is carried out after the setting is completed.
Calibrating an antenna optical reference and an antenna measurement system reference, wherein the antenna optical reference refers to a coordinate system represented by an optical reference prism arranged on an antenna, and the antenna measurement system reference refers to an antenna scanning coordinate system; the antenna near field test system controls the probe to translate in X-axis and Y-axis by attaching a target to the scanning frame probe, 3 probe positions are measured by building a station by using the theodolite 1 and the theodolite 2 after translating, a scanning frame coordinate system is obtained by measuring 3 points, an angle transfer matrix of the theodolite coordinate system relative to the scanning frame coordinate system is calibrated,by aligning on the antennaThe cube mirror performs collimation measurement to obtain an angle transfer matrix of the antenna optical coordinate system relative to the theodolite coordinate system,/for the theodolite coordinate system>Thereby obtaining a transfer matrix of the antenna optical coordinate system relative to the scanning frame coordinate
Calibrating the direction of an antenna electric scanning rotating shaft, maintaining the machine scanning angle at 0 DEG, setting different electric scanning directional angles through an antenna controller, generating a wave control code to carry out phased array antenna wave control, measuring at 3 electric scanning angles of 10 DEG, 0 DEG, -10 DEG and the like, obtaining vector representation of the maximum vector of an antenna pattern in an antenna measuring system scanning coordinate system under the 3 electric scanning angles, wherein the electric scanning rotating shaft is perpendicular to the three vectors, and obtaining vector representation P of the antenna electric scanning rotating shaft in the antenna measuring coordinate system according to vector multiplication operation and right-hand rule Electric power 。
Calibrating the direction of an antenna machine scanning rotating shaft, maintaining the electric scanning angle to be 0 DEG, setting different machine scanning pointing angles through an antenna controller, driving the pointing mechanism to mechanically rotate by the antenna controller, measuring at 3 machine scanning angles of 10 DEG, 0 DEG, -10 DEG and the like, obtaining the representation of the maximum vector of an antenna pattern in an antenna measuring system scanning coordinate system under the 3 machine scanning angles, wherein the machine scanning rotating shaft is vertical to the three vectors, and obtaining the vector representation P of the antenna machine scanning rotating shaft in the antenna measuring coordinate system according to vector multiplication operation and right hand rule Machine for making food 。
And (3) checking the verticality of the rotating shaft of the antenna machine and the electric scanning, wherein the verticality of the rotating shaft of the antenna machine and the electric scanning can be ensured through machining, antenna assembly and the like under normal conditions, and the pointing requirement can be met. According to the obtained electric and electric scanning vectors of the antenna, checking whether the two rotating shaft directions are vertical, if a certain deviation exists, correcting the two rotating shaft directions in a mode of installing and adjusting the antenna on the rotating shaft, and the like, finally realizing the vertical of the electric and electric scanning rotating shafts, and obtaining the final electric and electric scanning rotating shaft vectors of the antenna, namely the antenna pointing coordinate system machine
Calibrating an antenna pointing coordinate system, obtaining a transfer matrix of the antenna pointing coordinate system relative to an antenna optical coordinate system by taking the scanning frame coordinate system as an intermediary according to vector representation of an antenna machine scanning and electric scanning rotating shaft in the antenna measuring system scanning coordinate system and the reference relation of the antenna optical reference and the antenna measuring system
After the antenna is mounted on the satellite, a transfer matrix of the antenna optical coordinate system relative to the satellite reference coordinate system is obtained by measuring the relation between the antenna optical reference and the satellite body referenceTransfer matrix of antenna pointing coordinate system in satellite reference coordinate system>
After the relation between the antenna pointing coordinate system and the satellite body coordinate system is obtained by the method, when the antenna pointing calculation is carried out on orbit, firstly, a satellite-borne computer calculates to obtain the representation of the pointing vector from the satellite to the target satellite under the satellite orbit coordinate system at each moment according to the satellite orbit parameter and the target satellite orbit parameter; then, according to the satellite attitude angle, obtaining the representation of the pointing vector under the satellite body coordinate system; according to the relation between the satellite body coordinate system and the antenna pointing coordinate system, calculating to obtain the representation of the pointing vector in the antenna pointing coordinate system, and further calculating to obtain the antenna machine-sweeping and electric-sweeping angles, wherein the machine-sweeping angles are as followsThe electric scanning angle is +.>x is the pointing vector and is positioned at the antennaThe X component in the standard system, Y is the Y component of the pointing vector in the antenna pointing coordinate system, Z is the Z component of the pointing vector in the antenna pointing coordinate system, and ρ is the vector length.
The application provides a method and a system for calibrating the pointing angle of a mechanically scanned phase scanned antenna, which provides a method for calibrating the pointing angle of an antenna combining a one-dimensional mechanism with a one-dimensional electric scan, wherein the mechanically scanned phase scanned antenna has the advantages of small physical size envelope, low power consumption relative to a two-dimensional phased array antenna and the like, and is gradually applied to a satellite system.
Those skilled in the art will appreciate that the application provides a system and its individual devices, modules, units, etc. that can be implemented entirely by logic programming of method steps, in addition to being implemented as pure computer readable program code, in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Therefore, the system and various devices, modules and units thereof provided by the application can be regarded as a hardware component, and the devices, modules and units for realizing various functions included in the system can also be regarded as structures in the hardware component; means, modules, and units for implementing the various functions may also be considered as either software modules for implementing the methods or structures within hardware components.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. The method for calibrating the pointing angle of the mechanically scanned phase scanned antenna is characterized by comprising the following steps of:
setting the spatial relation between the antenna and the measuring system: adopting a plane near field test system to set the relative position relation between the antenna and the measurement system;
calibrating an antenna optical reference and an antenna measurement system reference: acquiring the representation of a scanning frame coordinate system in a theodolite coordinate system, and acquiring the representation of an optical coordinate system represented by an antenna prism surface normal in the theodolite coordinate system to obtain a transfer matrix of the antenna optical prism coordinate system relative to the antenna scanning frame coordinate system;
calibrating the direction of the electric scanning rotating shaft of the antenna: setting different electric scanning pointing angles, obtaining the representation of the maximum vector of the antenna pattern under a plurality of angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the electric scanning rotating shaft of the antenna through vector calculation;
calibrating the direction of the scanning rotating shaft of the antenna machine: setting different machine scanning pointing angles, obtaining the representation of the maximum vector of the antenna pattern under a plurality of mechanical angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the machine scanning rotating shaft of the antenna through vector calculation;
and correcting the verticality of the rotating shaft of the antenna machine and the electric scanning: checking whether the two rotating shaft directions are vertical or not, and if the deviation affects the pointing precision of the antenna, performing self-installation correction of the antenna to realize the vertical of the machine-sweeping and electric-sweeping rotating shafts;
calibrating an antenna pointing coordinate system: obtaining the relation of an antenna pointing coordinate system in an antenna scanning coordinate system according to the antenna electric scanning rotating shaft direction calibration and the machine scanning rotating shaft direction calibration results, and obtaining the representation of the antenna pointing coordinate system in the antenna optical reference according to the relation between the antenna optical reference and the antenna measuring system reference;
calibrating an antenna pointing coordinate system and a satellite reference coordinate system: after the antenna is mounted on the satellite, a transfer matrix of the antenna optical coordinate system relative to the whole satellite reference coordinate system is obtained, and the antenna pointing coordinate system and the satellite reference coordinate system are obtained by taking the antenna optical coordinate system as an intermediary.
2. The method for calibrating the pointing angle of the mechanically scanned and phase scanned antenna according to claim 1, wherein the step of setting the spatial relationship between the antenna and the measuring system specifically comprises the following steps: and (3) adopting a planar near-field test system, placing the antenna array surface opposite to the scanning surface of the antenna scanning system, setting the distance from the antenna surface to the scanning probe by considering relevant factors including the working frequency band of the antenna, the caliber of the antenna and the scanning rotation range of the machine, determining that the requirements of near-field test conditions are met, and carrying out antenna pattern test after the setting is completed.
3. The method for calibrating the pointing angle of the mechanically scanned and phase scanned antenna according to claim 1, wherein the step of calibrating the antenna optical reference and the antenna measurement system reference specifically comprises the following steps: attaching targets on a scanning frame probe of an antenna near-field test system, controlling the probe to translate in an X axis and a Y axis through the antenna test system, measuring a plurality of probe positions through a first theodolite and a second theodolite by using a front intersection measurement method after translating, obtaining a scanning frame coordinate system, and calibrating an angle transfer matrix of the scanning frame coordinate system relative to the theodolite coordinate system; and then, obtaining the representation of the antenna optical prism coordinate system in the theodolite coordinate system by adopting an optical collimation measurement method, and obtaining a transfer matrix of the antenna optical prism coordinate system relative to the scanning frame coordinate system by taking the theodolite coordinate system as an intermediary.
4. The method for calibrating the pointing angle of the mechanically scanned phase scanned antenna according to claim 1, wherein the step of calibrating the direction of the rotating shaft of the antenna electric scanning specifically comprises the following steps: the antenna machine scanning angle is maintained at 0 degree, different electric scanning pointing angles are set through an antenna controller, measurement is carried out at a plurality of electric scanning angles, the representation of the maximum direction vector of the antenna pattern in the scanning coordinate system of the antenna measuring system under the plurality of electric scanning angles is obtained, an electric scanning rotating shaft is perpendicular to the three vectors, and the representation of the electric scanning rotating shaft vector of the antenna is obtained according to vector operation and right-hand rule.
5. The method for calibrating the pointing angle of the mechanically scanned antenna according to claim 1, wherein the step of calibrating the direction of the mechanically scanned rotating shaft of the antenna specifically comprises the following steps: the electric scanning angle is maintained to be 0 degree, different machine scanning pointing angles are set through an antenna controller, an antenna mechanism is controlled to mechanically rotate, measurement is carried out at a plurality of machine scanning angles, the representation of the maximum direction vector of the antenna pattern under the plurality of machine scanning angles in a scanning coordinate system of an antenna measuring system is obtained, a machine scanning rotating shaft is perpendicular to the three vectors, and the vector representation of the antenna machine scanning rotating shaft is obtained according to vector operation and right-hand rule.
6. The method for calibrating the pointing angle of the mechanically scanned and phase scanned antenna according to claim 1, wherein the step of correcting the perpendicularity of the mechanically scanned and phase scanned rotating shaft of the antenna comprises the following steps: and checking whether the two rotating shaft directions are vertical according to the obtained electric and electric scanning vector representations of the antenna, and if the two rotating shaft directions are vertical, the antenna is corrected by a related mode including installation and adjustment of the antenna on the mechanical rotating shaft, so that the vertical of the electric and electric scanning rotating shafts of the antenna is finally realized, and the final electric and electric scanning rotating shaft vectors of the antenna, namely the antenna pointing coordinate system, are obtained.
7. The method for calibrating the pointing angle of the mechanically scanned antenna according to claim 1, wherein the step of calibrating the antenna pointing coordinate system and the satellite reference coordinate system comprises the steps of: after the antenna is mounted to a satellite, a transfer matrix of an antenna optical coordinate system relative to a whole satellite reference coordinate system is obtained by measuring the reference relation between the antenna optical reference and a satellite body, and the antenna optical coordinate system is used as an intermediary, so that the relation between an antenna pointing coordinate system and the satellite reference coordinate system is obtained;
and when the antenna is pointed, finally obtaining a pointing vector when the antenna points to the target, further obtaining a pointing angle, and controlling the antenna to point.
8. The utility model provides a machine sweeps looks and sweeps antenna directional angle calibration system which characterized in that includes:
the spatial relation setting module of the antenna and the measuring system: adopting a plane near field test system to set the relative position relation between the antenna and the measurement system;
antenna optical reference and antenna measurement system reference calibration module: acquiring the representation of a scanning frame coordinate system in a theodolite coordinate system, and acquiring the representation of an optical coordinate system represented by an antenna prism surface normal in the theodolite coordinate system to obtain a transfer matrix of the antenna optical prism coordinate system relative to the antenna scanning frame coordinate system;
the antenna electric scanning rotating shaft direction calibration module comprises an antenna electric scanning rotating shaft direction calibration module: setting different electric scanning pointing angles, obtaining the representation of the maximum vector of the antenna pattern under a plurality of angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the electric scanning rotating shaft of the antenna through vector calculation;
the antenna machine sweeping rotating shaft direction calibration module comprises: setting different machine scanning pointing angles, obtaining the representation of the maximum vector of the antenna pattern under a plurality of mechanical angles in the scanning coordinate system of the antenna measurement system, and obtaining the vector representation of the machine scanning rotating shaft of the antenna through vector calculation;
antenna machine sweeps, electricity sweeps pivot straightness correction module that hangs down: checking whether the two rotating shaft directions are vertical or not, and if the deviation affects the pointing precision of the antenna, performing self-installation correction of the antenna to realize the vertical of the machine-sweeping and electric-sweeping rotating shafts;
antenna pointing coordinate system calibration module: obtaining the relation of an antenna pointing coordinate system in an antenna scanning coordinate system according to the antenna electric scanning rotating shaft direction calibration and the machine scanning rotating shaft direction calibration results, and obtaining the representation of the antenna pointing coordinate system in the antenna optical reference according to the relation between the antenna optical reference and the antenna measuring system reference;
the antenna pointing coordinate system and satellite reference coordinate system calibration module: after the antenna is mounted on the satellite, a transfer matrix of the antenna optical coordinate system relative to the whole satellite reference coordinate system is obtained, and the antenna pointing coordinate system and the satellite reference coordinate system are obtained by taking the antenna optical coordinate system as an intermediary.
9. The system for calibrating the pointing angle of the mechanically scanned and phase scanned antenna according to claim 8, wherein the spatial relationship setting module of the antenna and the measuring system specifically comprises: and (3) adopting a planar near-field test system, placing the antenna array surface opposite to the scanning surface of the antenna scanning system, setting the distance from the antenna surface to the scanning probe by considering relevant factors including the working frequency band of the antenna, the caliber of the antenna and the scanning rotation range of the machine, determining that the requirements of near-field test conditions are met, and carrying out antenna pattern test after the setting is completed.
10. The system for calibrating the pointing angle of the mechanically scanned antenna according to claim 8, wherein the step of calibrating the antenna optical reference and the antenna measurement system reference specifically comprises: attaching targets on a scanning frame probe of an antenna near-field test system, controlling the probe to translate in an X axis and a Y axis through the antenna test system, measuring a plurality of probe positions through a first theodolite and a second theodolite by using a front intersection measurement method after translating, obtaining a scanning frame coordinate system, and calibrating an angle transfer matrix of the scanning frame coordinate system relative to the theodolite coordinate system; then, an optical collimation measurement method is adopted to obtain the representation of the antenna optical prism coordinate system in the theodolite coordinate system, and the theodolite coordinate system is used as an intermediary to obtain a transfer matrix of the antenna optical prism coordinate system relative to the scanning frame coordinate system;
the antenna electric scanning rotating shaft direction calibration step specifically comprises the following steps: the scanning angle of the antenna is maintained at 0 DEG, different electric scanning pointing angles are set through an antenna controller, measurement is carried out at a plurality of electric scanning angles, the representation of the maximum direction vector of the antenna pattern in the scanning coordinate system of the antenna measuring system under the plurality of electric scanning angles is obtained, the electric scanning rotating shaft is perpendicular to the three vectors, and the vector representation of the electric scanning rotating shaft of the antenna is obtained according to vector operation and right hand rule;
the antenna machine sweeping rotating shaft direction calibration step specifically comprises the following steps: the electric scanning angle is maintained to be 0 degree, different machine scanning pointing angles are set through an antenna controller, an antenna mechanism is controlled to mechanically rotate, measurement is carried out at a plurality of machine scanning angles, the representation of the maximum direction vector of an antenna pattern under the plurality of machine scanning angles in a scanning coordinate system of an antenna measurement system is obtained, a machine scanning rotating shaft is perpendicular to the three vectors, and the vector representation of the antenna machine scanning rotating shaft is obtained according to vector operation and right-hand rule;
the antenna machine scanning and electric scanning rotating shaft verticality correction step comprises the following steps: checking whether two rotating shaft directions are vertical according to the obtained electric scanning and electric scanning vector representation of the antenna, if a certain deviation affects the pointing precision of the antenna, correcting by a related mode including installation and adjustment of the antenna on a mechanical rotating shaft, finally realizing the vertical of the electric scanning and electric scanning rotating shaft, and obtaining final electric scanning and electric scanning rotating shaft vectors of the antenna, namely an antenna pointing coordinate system;
the calibration step of the antenna pointing coordinate system and the satellite reference coordinate system comprises the following steps: after the antenna is mounted to a satellite, a transfer matrix of an antenna optical coordinate system relative to a whole satellite reference coordinate system is obtained by measuring the reference relation between the antenna optical reference and a satellite body, and the antenna optical coordinate system is used as an intermediary, so that the relation between an antenna pointing coordinate system and the satellite reference coordinate system is obtained;
and when the antenna is pointed, finally obtaining a pointing vector when the antenna points to the target, further obtaining a pointing angle, and controlling the antenna to point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310862504.3A CN117080743A (en) | 2023-07-13 | 2023-07-13 | Method and system for calibrating pointing angle of mechanically-scanned phase-scanned antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310862504.3A CN117080743A (en) | 2023-07-13 | 2023-07-13 | Method and system for calibrating pointing angle of mechanically-scanned phase-scanned antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117080743A true CN117080743A (en) | 2023-11-17 |
Family
ID=88706935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310862504.3A Pending CN117080743A (en) | 2023-07-13 | 2023-07-13 | Method and system for calibrating pointing angle of mechanically-scanned phase-scanned antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117080743A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117723849A (en) * | 2024-02-07 | 2024-03-19 | 长光卫星技术股份有限公司 | Space two-dimensional high-frequency antenna pointing precision ground calibration method, equipment and medium |
-
2023
- 2023-07-13 CN CN202310862504.3A patent/CN117080743A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117723849A (en) * | 2024-02-07 | 2024-03-19 | 长光卫星技术股份有限公司 | Space two-dimensional high-frequency antenna pointing precision ground calibration method, equipment and medium |
| CN117723849B (en) * | 2024-02-07 | 2024-04-26 | 长光卫星技术股份有限公司 | Space two-dimensional high-frequency antenna pointing precision ground calibration method, equipment and medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106501783B (en) | A kind of spacecrafts rendezvous microwave radar angle measurement performance system error calibration system and method | |
| CN103454619B (en) | Electrical axis optical calibration system of spaceborne microwave tracking-pointing radar and calibration method thereof | |
| CN110377929B (en) | Method and apparatus for correcting three-axis antenna pointing | |
| US7724188B2 (en) | Gimbal system angle compensation | |
| CN108879106B (en) | Double-reflector antenna profile real-time adjustment method based on optimal fitting | |
| CN104101786A (en) | All airspace active multi beam spherical phased array antenna direction diagram measurement system | |
| US11906653B2 (en) | System and method of calibrating a radar rotatable antenna system | |
| CN109633575B (en) | Three-axis calibration system and method for satellite-borne microwave optical composite radar | |
| CN112485757B (en) | On-orbit calibration method and system for antenna electric shaft of satellite-borne terahertz detector | |
| CN111044017A (en) | External orientation element calibration and complete machine assembly method for large-field-of-view aerial scanner | |
| CN117080743A (en) | Method and system for calibrating pointing angle of mechanically-scanned phase-scanned antenna | |
| CN104697489B (en) | A kind of plane normal azimuth measuring device, method and application | |
| WO2022089581A1 (en) | Assembly method and system for flat array sar antenna unfolding system | |
| CN108872942A (en) | The real-time keeping method in active primary reflection surface antenna ideal shape face based on datum mark | |
| CN107727118B (en) | Method for calibrating GNC subsystem equipment attitude measurement system in large aircraft | |
| CN112033349B (en) | Antenna electric axis coordinate system calibration and pointing angle correction method and system | |
| CN109212495B (en) | Automatic radar target calibration method and system based on gyroscope | |
| CN103185566B (en) | A kind of proving installation of reflector antenna beam position and method of testing thereof | |
| US5341147A (en) | Method for measuring and correcting antenna RF beam alignment | |
| CN115061148A (en) | Rocket vertical takeoff section track measuring method and system | |
| JP7345377B2 (en) | Alignment measurement system, information processing device, alignment measurement method and program | |
| CN113701709A (en) | Airborne SAR (synthetic aperture radar) one-axis platform beam-bunching mode antenna array plane pitching pointing algorithm and system | |
| CN116295018B (en) | Target pose measurement method and system | |
| CN114509001B (en) | Quick and accurate assembling and adjusting method and system for large-size space structure | |
| CN116817872B (en) | Unmanned full-automatic high-precision homing measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |