CN106229605B - A Precise Installation Method of Large Phased Array Antenna Based on Mathematical Modeling - Google Patents
A Precise Installation Method of Large Phased Array Antenna Based on Mathematical Modeling Download PDFInfo
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- H—ELECTRICITY
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Abstract
The invention discloses a kind of accurate installation method of massive phased array antenna based on mathematical modeling is suitable for large scale, the demanding single-blade of installation accuracy or double-vane massive phased array antenna is precisely installed and commissioning, belongs to microwave remote sensing totality general assembly design field.The method comprising the steps of: (1) establishing celestial body coordinate system；(2), accurate adjustment celestial body posture；(3) coordinate of installation point on antenna and celestial body is measured；(4) founding mathematical models calculate adjustment gasket；(5) gasket is added according to calculated result and antenna is installed；(6) measurement plane is comprehensive is directed toward, and corrects gasket.It repeats to try to gather the problem of adjustment influences the traditional thread binding star precision in day and efficiency the invention avoids massive phased array antenna, has many advantages, such as that engineering exploitativeness is strong, installation accuracy easily guarantees, reduces adjustment and accurate measurement number, raising installation effectiveness.
Description
Technical field
The invention belongs to microwave remote sensing totality general assembly design fields, and in particular to a kind of large size based on mathematical modeling is phased
The accurate mounting technique implementation method of array antenna, main application direction are large scale, the demanding massive phased array day of installation accuracy
Line is precisely installed and commissioning.
Background technique
Recently as the rapid development of spacecraft payload technology, (single-blade length is greater than 5 to massive phased array antenna
Rice, Planar Phased Array Antenna of the double-vane length greater than 10 meters or diameter are greater than 10 meters of parabola antenna) due to its high-resolution,
The characteristics such as multipolarization, multiple-working mode have obtained more and more applications in microwave remote sensing field, and still, high-quality is defended
Star picture quality also proposes higher requirement to the installation accuracy of massive phased array antenna.
The installation accuracy of massive phased array antenna mainly includes that comprehensive flatness R (unit: mm) and comprehensive direction N is unfolded
(vector, including three orientation angles), the realization of this two precision indexs not only rely on aerial radiation front itself adjustment precision
With antenna deployment mechanism itself adjustment precision, the commissioning precision during antenna and celestial body general assembly is also relied on, or even is only passed through
General assembly link carries out accurate commissioning to the whole span open state of massive phased array antenna, can obtain the comprehensive flatness of the expansion needed
And specifically integrate pointing accuracy.
Currently, the satellite borne equipment adjustment process for having installation accuracy to require generally uses traditional during satellite assembly
Mode is gathered in artificial examination.Its main flow is: installing equipment first, tightens mounting screw, then utilizes accurate measurement equipment (theodolite
Deng) measuring device installation site, angle precision, if being unsatisfactory for required precision, accurate measurement personnel are according to measurement experience in established angle position
Increase adjustment gasket is set, accurate measurement equipment is recycled to re-measure, after commissioning repeatedly, until precision of equipment installation satisfaction is wanted
It asks.Such methods have the disadvantage in that
1) such method is just for small device (equipment of length or radius less than the 5 meters) adjustment for having installation accuracy to require
Process, mounting surface need to be single, and the position that established angle increases adjustment gasket need to be simple to operation, and at present for complexity mounting surface
The dress star method of massive phased array antenna there is no referential experience at home；
If 2) such method is once assembled not in place, on the one hand trial and adjustment repeatedly can cause equipment to install interface
Deformation and interface precision reduction, on the other hand also result in the reduction of equipment installation effectiveness, comprehensive plane be unfolded for having
For the large-scale Planar Phased Array Antenna of degree and comprehensive pointing accuracy requirement, examination repeatedly is gathered each time, can all be brought biggish
Workload, and gather only with artificial experience examination, the accurate installation accuracy of requirement may not necessarily be reached.
Patent name is that " SAR days line automation accurate measurement methods of satellite large scale planar array " has pertained only to large scale plane
The automation accurate measurement of array SAR antenna, the fitting algorithm including antenna array flatness and plane normal, but the patent are only managed
By calculating, the installation of large-scale Planar Phased Array Antenna cannot be accurately instructed according to precision measure data.
Summary of the invention
Technology of the invention solves the problems, such as: traditional artificial experience examination being overcome to gather, repeat commissioning equipment Installation Modes not
Foot provides a kind of accurate installation method of massive phased array antenna being suitble to complicated mounting surface, this method accurate measurement before filling star
Mathematical model is converted by the commissioning process of massive phased array antenna on the basis of data, calculates adjustment gasket addition scheme,
Gasket is added according to calculated result, massive phased array antenna is avoided and repeats examination and gather adjustment to influence the traditional thread binding star precision in day and efficiency
Problem.
The technical solution of the invention is as follows: a kind of accurate installation method of massive phased array antenna based on mathematical modeling,
This method includes the following steps:
(1), celestial body coordinate system is established, the celestial body coordinate system coordinate origin O is the central point of satellite and the rocket parting surface, and X-axis is just
Direction is satellite flight direction, and Z axis positive direction is that direction, Y-axis positive direction and X0Z plane meet right-hand law over the ground；
(2), the mounting surface on celestial body is gone to and docks orientation with phased array antenna, accurate adjustment celestial body posture makes bowing for celestial body
Three peaces facing upward, rock, yawing three direction postures and celestial body coordinate system X-axis, Y-axis, the angular error of Z axis less than 0.1, on celestial body
The deviation for decorateeing Y axis coordinate value and system requirements is less than 0.1mm；
(3), three installation points are constructed in three installation points and celestial body of antenna in celestial body mounting surface and antenna mounting surface
The projected triangle of public vertical plane, using the method for plane geometry, Analytic triangular function, which solves each installation point position, needs increased tune
Whole spacer thickness；
(4) calculated result obtained according to step (3) adds corresponding adjustment at three installation points of massive phased array antenna
Antenna is mounted on celestial body by gasket；
(5) the comprehensive direction Nt0 of antenna array plane after antenna is mounted on celestial body by measurement, solves antenna array method
The angle of line and celestial body coordinate system X-axis, Y-axis and Z axis judges the absolute value of the difference for the angle that three angles and system requirements reach
Whether being entirely below preset thresholding entirely below then terminates antenna installation process, otherwise, is transferred to step (6)；
(6) difference of the angle reached when antenna array normal with corresponding celestial body coordinate system reference axis angle and system requirements
For+Δ, Δ is positive number, reduces corresponding installation point spacer thickness, and the difference of angle is-Δ, and Δ is positive number, increases corresponding installation point pad
Piece thickness；
(7) step (5)~step (6) are repeated until the angle of antenna array normal and celestial body coordinate system X-axis, Y-axis and Z axis
The absolute value of the difference of the angle reached with system requirements is entirely below preset thresholding.
The phased array antenna docking orientation is located at satellite flight direction, i.e. X-axis positive direction or X-axis negative direction.
When two phased array antenna of installation on celestial body, when antenna docking orientation is respectively X-axis positive direction and X-axis negative direction,
This method comprises the following steps:
Firstly, according to above-mentioned steps (1)~step (7), respectively by the phased array antenna docking orientation replacement in step (2)
For X-axis positive direction and X-axis negative direction, X-axis two phased array antenna of positive negative direction are mounted on celestial body；
Then, the comprehensive synthesis flatness Rt for being directed toward Nt and whole wing antenna of whole wing antenna array plane is measured；
Finally, judging whether the synthesis flatness Rt of the comprehensive direction Nt of whole wing antenna array plane or whole wing antenna is less than
The deviation range of system requirements, any one are unsatisfactory for requiring, then continue adjust two sides installation gasket height, until two simultaneously
It meets the requirements, i.e. the dress star work of completion double side wings antenna.
Above-mentioned steps (3) construct three installation points in three installation points and celestial body of antenna and pacify in celestial body mounting surface and antenna
The projected triangle of the public vertical plane in dress face, using the method for plane geometry, Analytic triangular function solves each installation point position and needs to increase
The detailed process of the adjustment spacer thickness added are as follows:
(3.1), coordinate value of three installation points of antenna under adjustment shim-like state under celestial body coordinate system is not added in measurement
A1(xa1,ya1,za1)、B1(xb1,yb1,zb1)、C1(xc1,yc1,zc1) and its fit Plane direction N1 (cos α 1, cos β 1,
Cos γ 1) and celestial body on correspond to installation point coordinate value A2 (xa2,ya2,za2)、B2(xb2,yb2,zb2)、C2(xc2,yc2,zc2) and
Its fit Plane is directed toward N2 (cos α 2, cos β 2, cos γ 2)；
(3.2), antenna mounting surface and celestial body installation are projected towards its public affairs vertical plane M, antenna installation point A1, B1, C1
Projection on plane M obtains the subpoint of subpoint A1', B1', C1' and celestial body installation point in the plane, by celestial body installation point
Subpoint in the plane translates to obtain A2', B2', C2', and it is one that two installation point A2' for keeping distance nearest are overlapped with A1'
Point eliminates the public difference in height of A1 and A2, B1 and B2 and C1 and C2, obtains projected triangle A1'C1'C2'；
(3.3), defining the antenna installation maximum installation point of interplanar distance is C1, and C1 point addition adjustment gasket is with a thickness of hC=
0, do not need addition gasket；
(3.4), calculate projected triangle ∠ C1'A1'C2' value α ', α '=α, α be celestial body mounting plane be directed toward N1 and
Antenna mounting plane is directed toward the vector angle of N2, its calculation formula is:
(3.5), according to the coordinate value of three installation points of celestial body, linear vector A2B2, A2C2 are calculated；Wherein, A2B2 vector
ForA2C2 vector is
(3.6), the angle theta between A2B2 and A2C2 and public vertical plane M is calculated1And θ2, it is obtained by vector angle formula:
(3.7) the projected length S of installation point linear vector A2B2, A2C2 on public vertical plane M on celestial body mounting surface is defined1With
S2, calculate in projected triangle according to the following formula | A2'B2' | and | A2'C2' |:
|A2'B2' |=S1=| A2B2|×sinθ1, | A2'C2' |=S2=| A2C2|×sinθ2；
(3.8) A1 point addition adjustment gasket is calculated with a thickness of d1=hA=| A2'C2' | × tg α ', B1 point adds adjusting pad
Piece thickness are as follows: hB=hA-h1=(| A2'C2'|-|A2'B2'|)×tgα'。
Above-mentioned steps (7) installation point being adjusted is determined by following principle: when B1, C1 are while being mounted on antenna array
When the installation point in face, when the difference of angle that the angle and system requirements of antenna array normal and celestial body coordinate system X-axis reach
When absolute value is more than pre-determined threshold, then the antenna installation point at A1 is adjusted；When the folder of antenna array normal and celestial body coordinate system Z axis
When the absolute value of the difference for the angle that angle and system requirements reach is more than pre-determined threshold, then the antenna installation point at B1 or C1 is adjusted.
Above-mentioned steps (7) the spacer thickness adjustment amount h increased or decreasedAdjustment amountAre as follows:
hAdjustment amount=tg (Δ) × L
When be adjusted installation point be A1 when, L be A1D1 distance, when be adjusted installation point be B1 or C1 when, L be B1D1 or
The distance of C1D1；D1 is the intersection point that A1 makees vertical line to B1C1.
Above-mentioned massive phased array antenna is parked on air floating table (5) by gas foot (6), passes through gas foot (6) and air floating table (5)
Realize the installation of phased array antenna zero-g.
Compared with the prior art, the invention has the advantages that:
1) engineering exploitativeness of the present invention is strong, can use the trend of accurate measurement instrument test and data analysis dress star result,
By mathematical model calculate analysis and regulation gasket add scheme, compared to artificial experience examination gather with more adjustment directionality and effectively
Property.
2) inventive antenna installation accuracy easily guarantees, is analyzed using the calculating of mathematical model, and dress star precision may make to have
Target value is most reached or approached fastly in the commissioning number of limit, according to verification experimental verification, the double side wings large size planar phased array of length 15m
Antenna, can an adjustment in place, and it is unfolded comprehensive flatness and reaches 3mm, and comprehensive pointing accuracy reaches 0.02 °.
3) inventive antenna installation effectiveness is high, and according to practical dress satellite experiment verifying, the adjustment spacer thickness of calculating most fastly may be used
In place by adjustment of antenna, reduce adjustment number, improve dress star efficiency.In addition, if adjustment of antenna is not in place, it can
Gasket amendment is adjusted using amendment scheme of the invention and adjustment amount calculates, and is avoided the blindness for manually trying to gather, is made to fill
Tune trend is quickly restrained to anticipated orientation.
4) present invention realizes the installation of phased array antenna zero-g by gas foot and air floating table, and gas foot and air floating table realize antenna
The mount scheme of zero-g its advantage is that succinct easy to operate, as long as air floating table plane precision be adjusted to 80 μm/10m hereinafter,
Meet antenna zero-g installation requirement；In addition, because antenna array also has the connecting cable that need to enter in celestial body cabin, and air bearing is flat
Degasification foot is outer without other auxiliary equipment on platform, avoids such as expansion hanger zero-g mode bring cable hooking risk, right
The installation and expansion of phased array antenna provide important equipment guarantee.
5) double-vane antenna is needed the comprehensive flatness of waveguide front to be achieved to be also included in evaluation variable by the present invention, is also suitable
The dress star of double side wings massive phased array antenna.
Detailed description of the invention
Fig. 1 (a) is the accurate installation method flow chart of single-blade of embodiment of the present invention massive phased array antenna
Fig. 1 (b) is the accurate installation method flow chart of double-vane of embodiment of the present invention massive phased array antenna；
Fig. 2 is celestial body of the embodiment of the present invention and aerial position relational graph；
Fig. 3 is that front of embodiment of the present invention target point pastes position view；
Fig. 4 (a) is two mounting surface intersection L of the embodiment of the present invention and two mounting surface normal vector location diagrams；
Fig. 4 (b) is that celestial body of the embodiment of the present invention is installed towards public vertical plane M projected position relational graph；
Fig. 4 (c) is that two mounting surface of the embodiment of the present invention projects location diagram on public vertical plane M；
Fig. 4 (d) is antenna of embodiment of the present invention installation point to respective coordinates wheelbase from calculating schematic diagram.
Specific embodiment
The present invention will be further described in the following with reference to the drawings and specific embodiments.
By taking certain satellite system massive phased array antenna installation process as an example, it is known that corresponding three mounting surface central points on celestial body
The coordinate position of system requirements is A (xa, ya, za), B (xb, yb, zb), C (xc, yc, zc), the system massive phased array antenna
The synthesis flatness R0 (unit: mm) and comprehensive direction N0={ cos α, cos β, cos γ } that accurate installation requirement reaches, the exhibition
It opens comprehensive flatness and refers to target point by the accurate measurements equipment scanning antenna front such as laser radar, obtained fit Plane degree；
It is comprehensive to be directed toward the target point for referring to scanning antenna front, three angular separation groups of obtained fit Plane normal and celestial body coordinate system
At vector N0={ cos α, cos β, cos γ }, it is desirable that meet after the traditional thread binding star in day: α=0 ° ± 0.1 °；β=90 ° ± 0.1 °；γ
=90 ° ± 0.1 °.
Fig. 1 is that the present invention is based on the accurate installation method flow charts of the phased array antenna of mathematical modeling, wherein Fig. 1 (a) is single
The accurate installation method flow chart of wing massive phased array antenna, Fig. 1 (b) are the accurate installation method process of double-vane massive phased array antenna
Figure.
One, specific step is as follows for the accurate installation method of single-blade massive phased array antenna:
Step 1 establishes celestial body coordinate system, and the celestial body coordinate system coordinate origin O is the central point (load of satellite and the rocket parting surface
The central point of cylinder lower end frame), X-direction is satellite flight direction, and Z-direction is that direction, Y-direction and the face X0Z meet the right hand and determine over the ground
Rule.
In order to which coordinate, comprehensive flatness and synthesis of the installation point under celestial body coordinate system refer on accurate measurement celestial body and on antenna
To etc., need the theoretical installation site according to known massive phased array antenna 1 under celestial body coordinate system, installation celestial body benchmark essence
Cross prism square 4, antenna frame accurate measurement cross prism square 2, antenna target point 8 and public target ball point 7 are surveyed, and establishes laser radar
Transformational relation between coordinate system, laser tracker coordinate system and co-ordinates of satellite system.
The establishment process of coordinate transformation relation is as follows:
(1) as shown in Fig. 2, massive phased array antenna 1 is parked on air floating table 5 by gas foot 6, passes through gas foot 6 and gas
Floating platform 5 realizes the installation of phased array antenna zero-g.
(2) celestial body benchmark accurate measurement cross prism square, antenna frame accurate measurement cross prism square, antenna target point and public are installed
Target ball point.
A, celestial body benchmark accurate measurement cross prism square is installed on the position that accurate measurement is convenient, is not susceptible to celestial body deformation, be used for
Reflect celestial body posture.
Such as: the loaded cylinder lower end frame neighbouring position as shown in serial number 4 in attached drawing 2, structure is unlikely to deform herein, will not
It generates and blocks because of the installation of antenna.
B, antenna frame accurate measurement cross prism square is installed on accurate measurement conveniently, is not susceptible to the position of antenna deformation, it can benefit
It is measured before and after the traditional thread binding star in day with theodolite, for the direction variation before and after the qualitative reflection rack-mounted star of antenna frame, to laser
The accurate measurement data of radar play the role of auxiliary interpretation.
Such as: the antenna frame lower end position as shown in serial number 2 in attached drawing 2 is unlikely to deform herein for antenna and not by star
The position that body blocks.
C, antenna target point is uniformly pasted on antenna array, quantity is enough to reflect the flatness of antenna array and comprehensive
Close pointing accuracy.
Such as: as shown in serial number 8 in attached drawing 3, to guarantee that antenna target point reflects the accuracy of antenna plane degree, paste close
Degree is not less than 18/m2。
D, public target ball point is pasted on air floating table and ground, it is common by theodolite, laser radar and laser tracker
Three-dimensional point coordinate of the public target ball central point under celestial body coordinate system is obtained, establishes laser radar coordinate system, laser tracker is sat
Transformational relation between mark system and celestial body coordinate system.
Such as: as shown in serial number 7 in attached drawing 2, public target ball point at 3 is pasted on air floating table, has been pasted at 2 on the ground
Public target ball point should paste the public target ball point at no less than 4, and cannot be located at 4 points for the accuracy for guaranteeing coordinate system conversion
On same plane.
(3) all accurate measurement data will be converted to uniformly relative to the data under celestial body coordinate system in the present invention.It is specific to sit
Mark conversion is realized by following steps:
1) 3 theodolites are set up, the prism square (serial number 4 in attached drawing 2) that celestial body coordinate system is characterized on satellite is measured,
And the target ball on public target ball pedestal is measured, it obtains three-dimensional point of the public target ball central point under celestial body coordinate system and sits
Mark；
2) suitable position sets up simultaneously fixed laser radar measurement system immediately ahead of air floating table, makes the target on all fronts
Point can measure the target on public target ball pedestal using the target ball measurement function of laser radar in the measurement range of laser radar
Ball obtains public target ball central point in the three-dimensional point coordinate of laser radar coordinate system；
3) beside laser radar set up and fixed laser tracker, make celestial body mounting surface and antenna mounting surface laser with
In track instrument measurement range, the target ball on public target ball pedestal is measured using the target ball measurement function of laser tracker, is obtained public
Three-dimensional point coordinate of the target ball central point in laser tracker coordinate system altogether；
4) it is converted by public target ball point, establishes laser radar coordinate system, laser tracker coordinate system and co-ordinates of satellite system
Transformational relation.
Step 2 installs preceding celestial body posture accurate adjustment:
Before the installation of massive phased array antenna, the accurate adjustment of celestial body posture is carried out, the mounting surface on celestial body is gone to and phased array
Antenna docks orientation, using theodolite accurate adjustment celestial body posture, makes the pitching of celestial body, rocks, yaws three direction postures and celestial body seat
Mark system X-axis, Y-axis, the angular error of Z axis are less than 0.1 °, it is desirable that three installation point heights (Y-direction coordinate value) are wanted with system on celestial body
Height (Y-direction coordinate value) is asked to be less than 0.1mm.
Step 3, mounting surface precision measure:
It (is not added under adjustment shim-like state) before the installation of massive phased array antenna, is utilized respectively laser tracker and takes a little
Coordinate value A1 (xa of the method to tri- installation points of A1, B1, C1 on antenna1,ya1,za1)、B1(xb1,yb1,zb1)、C2(xc1,
yc1,zc1) and fit Plane be directed toward the coordinate value A2 (xa of corresponding A 2, B2, C2 installation point on (N1) and celestial body2,ya2,za2)、
B2(xb2,yb2,zb2)、C2(xc2,yc2,zc2) and fit Plane direction (N2) progress precision measure, and utilize public target ball point
It is scaled to celestial body coordinate system, obtaining two vectors and each reference axis angle of celestial body coordinate system is respectively α 1, β 1, γ 1；α 2, β 2,
γ2。
Corresponding A2, B2, C2 are really installed in engineering on three installation points A1, B1, C1 and celestial body on antenna
Face, for 5 meters or more of massive phased array antenna, the mounting surface of outer dimension 10mm~20mm may be considered installation
Point, and each mounting surface is formed by machine tooling, flatness is in 0.1mm hereinafter, therefore, for the letter for measuring and calculating
Change, each mounting surface is replaced by screw mounting hole central point a certain near the central point in respective face, it is desirable that antenna mounting surface
With the installation point position consistency chosen on celestial body.
At this point it is possible to be directed toward data using transit survey antenna frame accurate measurement cross prism square and record, it is used for and day
Prism square after traditional thread binding star, which is directed toward, carries out data comparison.
Step 4, the calculating for adjusting gasket:
As shown in Fig. 3, three installation points for defining antenna are physical location, and it is target position that installation point is corresponded on celestial body
It sets, has obtained position installation point coordinate value A1 (xa to be adjusted in step 31,ya1,za1)、B1(xb1,yb1,zb1)、C2
(xc1,yc1,zc1) and target position installation point coordinate value A2 (xa2,ya2,za2)、B2(xb2,yb2,zb2)、C2(xc2,yc2,
zc2), using plane geometry method, target position and physical location are constructed in the projected triangle of its public vertical plane, passes through triangle letter
Number relationship, which solves each mounting surface position, needs increased adjustment gasket thickness hA、hB、hC, specific calculating process is as follows:
(1) assume in celestial body mounting surface A2B2C2, A2 point is minimum point, and celestial body mounting surface A2B2C2 is translated, A2 is made
Point is overlapped with A1 point, and the normal vector N2 of the normal vector N1 of antenna mounting surface and celestial body mounting surface is moved at A2 point, then day
The intersection of line mounting surface A1B1C1 and celestial body mounting surface A2B2C2 were A2 point and the straight line L perpendicular to N1 and N2, such as attached drawing 4
(a) shown in；Antenna mounting surface normal vector N1 and celestial body mounting surface normal vector N2 constitutes plane M, and plane M is antenna mounting surface
The public vertical plane of A1B1C1 and celestial body mounting surface A2B2C2.Antenna mounting surface and celestial body installation are projected towards its public affairs vertical plane M,
Projection on antenna installation point A1, B1, C1 plane M obtains the throwing of subpoint A1', B1', C1' and celestial body installation point in the plane
Shadow point translates the subpoint of celestial body installation point in the plane to obtain A2', B2', C2', two installation points for keeping distance nearest
It is a point that A2' is overlapped with A1', eliminates the public difference in height of public A1 and A2, B1 and B2 and C1 and C2, finally obtains attached drawing
Projected triangle A1'C1'C2' shown in 4 (c).
(2) assume antenna mounting surface and the celestial body installation maximum installation point of interplanar distance is C1, C1 point addition adjustment gasket is thick
Degree are as follows: hC=0, addition gasket is not needed, installation point A1, B1 on antenna need to be only raised to and stellar target position projection line
It is parallel.
(3), value α ', α '=α of the ∠ C1'A1'C2' of projected triangle is calculated, α is that celestial body mounting plane is directed toward N1 and day
The vector angle of line mounting plane direction N2.
According to laser tracker precision measure as a result, using N1 and N2 vector relations founding mathematical models, solution do not add
Add the vector angle α of N1 and N2 under adjustment shim-like state.
If angle is α between two vector N1={ cos α 1, cos β 1, cos γ 1 } and N2={ cos α 2, cos β 2, cos γ 2 },
Utilize angle formulae between two vectors:
Antenna mounting surface can be found out and be directed toward N1 and vector angle α of the celestial body mounting surface N2 in non-mounting and adjusting gasket.
(4) according to the coordinate value of celestial body installation point, linear vector A2B2, A2C2 are calculated；Wherein, A2B2 vector isA2C2 vector is
(5), the angle theta between A2B2 and A2C2 and public vertical plane M is calculated1And θ2, it is obtained by vector angle formula:
(6) such as geometrical relationship in attached drawing 4 (b) figure, installation point linear vector A2B2 on celestial body mounting surface is defined, A2C2 is in public affairs
Projected length S on vertical plane M1And S2, calculate in projected triangle according to the following formula | A2'B2' | and | A2'C2' |:
|A2'B2' |=S1=| A2B2|×sinθ1, | A2'C2' |=S2=| A2C2|×sinθ2；
(7) A1 point addition adjustment gasket is calculated with a thickness of d1=hA=| A2'C2' | × tg α '=S2The addition of × tg α ', B1 point
Gasket is adjusted with a thickness of hB=hA-h1=(| A2'C2'|-|A2'B2' |) × tg α '=(S2-S1)×tgα'。
Step 5, the calculated result obtained according to step 4 add corresponding adjustment at three installation points of massive phased array antenna
Antenna is mounted on celestial body by gasket.Meanwhile it can use transit survey antenna frame accurate measurement cross prism square and being directed toward data
And record, data comparison is carried out for being directed toward with the prism square before the traditional thread binding star in day, judges that the traditional thread binding star in day subsequently points to variation tendency.If
It is consistent with the variation tendency for being expected to reach that prism square is directed toward variation tendency, then can determine that adjustment gasket mount scheme is effective, if not
Unanimously, then it needs to re-start step 3 and step 4.
Step 6 is directed toward Nt0 using the antenna array target point plane after the traditional thread binding star in laser radar accurate measurement day is comprehensive, solves
The angle of antenna array normal and celestial body coordinate system X-axis, Y-axis and Z axis, judge angle that three angles and system requirements reach it
Whether absolute value of the difference, which is entirely below preset thresholding, entirely below then terminates antenna installation process, otherwise, is transferred to step
(7)。
Step 7, adjustment gasket add revision of option.
It is large-scale during actually dress star and accurate measurement since computation model is established under pure rigid ideal conditions
Phased array antenna and celestial body posture can still have the case where a small amount of stress deformations, become according to the variation of Nt0 in accurate measurement result
Gesture analyzes and determines the growth trend of adjustment gasket, suitably decreases or increases corresponding position adjustment spacer thickness.
When the difference for the angle that antenna array normal reaches with corresponding reference axis angle and system requirements is+Δ, Δ is positive
Number reduces corresponding installation point spacer thickness, when the folder that antenna array normal reaches with corresponding reference axis angle and system requirements
The difference at angle is-Δ, and Δ is positive number, increases corresponding position spacer thickness.
As shown in attached drawing 4 (d), according to the position characteristics of antenna mounting surface A1B1C1, B1C1 is located on antenna array, by A1
Intersection point D1 is obtained as vertical line to B1C1, using D1 point as coordinate origin, establishes the antenna parallel with whole three direction of star coordinate system
Coordinate system, then A1D1 is distance of the A1 point to X-axis on antenna array, and B1D1, C1D1 are respectively B1 point and C1 point to antenna array
The distance of upper Z axis.
Increasing and reducing spacer thickness adjustment amount is hAdjustment amount:
hAdjustment amount=tg (Δ) × L
In formula, L is the distance that the installation point fastens respective coordinates axis to antenna coordinate, unit: mm.
Correspondence installation point reference axis according to corresponding to antenna array normal of adjustment is determining, if X-direction deviation is Δ, then
The antenna installation point at A1 need to be adjusted, L is the distance of A1D1；If Z-direction deviation is Δ, then need at adjustment B1 point (or C1 point)
Antenna installation point, L are the distance of B1D1 (or C1D1).
According to the installation dot characteristics of massive phased array antenna, the antenna installation point of the position B1, C1 is equal in the face antenna X and the face Z
Mountable adjustment gasket, generally, if antenna array normal is met the requirements with Y-direction angle, the antenna installation point of the position B1, C1
The face Z need not mounting and adjusting gasket, therefore the position B1, C1 referred to herein adjustment gasket such as emphasizes to be the face X without special.Such as
Y-direction deviation is Δ, then needs the face the antenna Z installation point at adjustment B1 point (or C1 point), and L is the distance of B1D1 (or C1D1).
Citing: if accurate measurement obtains Nt0={ cos α t 0, cos β t 0, cos γ t 0 }, wherein γ t 0=90.15 °, 0 He of α t
β t 0 meets to be required in ± 0.1 ° of deviation range, illustrates that antenna array normal and celestial body X-direction angle are bigger than normal, then A point tune
Whole spacer thickness should suitably reduce, reduction amount according to:
hAdjustment amount=tg (Δ) × L
Wherein: Δ is amount of angular deviation, is 90.15 ° -90 °=0.15 ° in this example；
L is distance of the A point to X-axis on antenna array, and the distance of A point to front is 1200mm in this example, then to subtract in A point
Gasket amount of thickness is adjusted less are as follows:
hAdjustment amount=tg (0.15 °) × 1200=3.1mm.
Step 8, repeatedly step 6~step 7 are complete until the absolute value of the difference for the angle that three angles reach with system requirements
Portion is lower than preset thresholding., then terminate single-blade antenna installation process.
Two, specific step is as follows for the accurate installation method of double-vane massive phased array antenna:
(1), celestial body coordinate system is established, the celestial body coordinate system coordinate origin O is the central point of satellite and the rocket parting surface, and X-axis is just
Direction is satellite flight direction, and Z axis positive direction is that direction, Y-axis positive direction and the face X0Z meet right-hand law over the ground；
(2), the mounting surface on celestial body is gone to and docks orientation with X-axis positive direction phased array antenna, accurate adjustment celestial body posture makes
The pitching of celestial body rocks, yaws three direction postures and celestial body coordinate system X-axis, Y-axis, the angular error of Z axis less than 0.1, on celestial body
Three installation point Y axis coordinate values and theory calls deviation be less than 0.1mm；
(3), accurate measurement does not add coordinate value A1 of three installation points of antenna under adjustment shim-like state under celestial body coordinate system
(xa1,ya1,za1)、B1(xb1,yb1,zb1)、C1(xc1,yc1,zc1) and its fit Plane direction N1 (cos α 1, cos β 1, cos
γ 1) and celestial body on correspond to installation point coordinate value A2 (xa2,ya2,za2)、B2(xb2,yb2,zb2)、C2(xc2,yc2,zc2) and its
Fit Plane is directed toward N2 (cos α 2, cos β 2, cos γ 2)；
(4), three installation points for defining antenna are physical location, and it is target position that installation point is corresponded on celestial body, using flat
Face method of geometry constructs target position and physical location in the projected triangle of its public vertical plane, is solved by Analytic triangular function
Each installation point position needs increased adjustment spacer thickness；
(5) calculated result obtained according to step (4) adds corresponding adjustment at three installation points of massive phased array antenna
X-axis positive direction phased array antenna is mounted on celestial body by gasket；Meanwhile it measuring antenna frame accurate measurement cross prism square and being directed toward data
And record, data comparison is carried out for being directed toward with the prism square before the traditional thread binding star in day, judges that the traditional thread binding star in day subsequently points to variation tendency；
(6) the antenna array target point plane after the traditional thread binding star in accurate measurement day is comprehensive is directed toward, and solves antenna array normal and celestial body
Whether all the angle of coordinate system X-axis, Y-axis and Z axis judges the absolute value of the difference for the angle that three angles and system requirements reach
Lower than preset thresholding, entirely below, then terminate antenna installation process, otherwise, is transferred to step (7)；
(7) difference of the angle reached when antenna array normal with corresponding reference axis angle and system requirements is+Δ, and Δ is
Positive number reduces corresponding installation point spacer thickness, reaches when antenna array normal with corresponding reference axis angle and system requirements
The difference of angle is-Δ, and Δ is positive number, increases corresponding position spacer thickness, and increasing and reducing spacer thickness adjustment amount is hAdjustment amount；
hAdjustment amount=tg (Δ) × L
In formula, L is the distance of respective coordinates axis in the installation point to antenna array, unit: mm.
(8) step (6)~step (7) are repeated until the angle of antenna array normal and celestial body coordinate system X-axis, Y-axis and Z axis
The absolute value of the difference of the angle reached with system requirements is entirely below preset thresholding.
(9) according to step (2)~step (8) accurate measurement and X-axis negative direction massive phased array three installation points of antenna are calculated
It adjusts gasket and adds quantity, and add corresponding adjustment gasket in the side-X and antenna is mounted on the side celestial body-X；
(10) the comprehensive synthesis flatness (Rt) for being directed toward Nt and whole wing antenna of the whole wing antenna array target point plane of accurate measurement；
(11) judge whether the synthesis flatness Rt of the comprehensive direction Nt of whole wing antenna array plane or whole wing antenna is less than
The deviation range of system requirements, any one are unsatisfactory for requiring, then according to step (7)~step (8) in the traditional thread binding star method in single-blade day
Continue to adjust spacer height, be met the requirements simultaneously until two, is i.e. the dress star work of completion double side wings antenna.
Inventive antenna installation accuracy easily guarantees, is analyzed using the calculating of mathematical model, may make dress star precision limited
Commissioning number in most reach or approach target value fastly, according to verification experimental verification, the double side wings large size planar phased array day of length 15m
Line, can an adjustment in place, and it is unfolded comprehensive flatness and reaches 3mm, and comprehensive pointing accuracy reaches 0.02 °.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (7)
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| CN112490669B (en) * | 2020-11-27 | 2024-07-16 | 北京无线电测量研究所 | Gesture adjusting method and device for phased array antenna near field test |
| CN113219426B (en) * | 2021-05-21 | 2022-11-25 | 上海航天电子通讯设备研究所 | Large-size SAR antenna assembly measurement method |
| CN113446985B (en) * | 2021-07-07 | 2023-03-28 | 上海航天测控通信研究所 | Method for calibrating electric axis direction of reflector antenna |
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