CN107300701A - Synthetic Aperture Radar satellite precision measure reference design method - Google Patents
Synthetic Aperture Radar satellite precision measure reference design method Download PDFInfo
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- CN107300701A CN107300701A CN201710343712.7A CN201710343712A CN107300701A CN 107300701 A CN107300701 A CN 107300701A CN 201710343712 A CN201710343712 A CN 201710343712A CN 107300701 A CN107300701 A CN 107300701A
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- prism
- primary standard
- reference block
- accurate measurement
- backup
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
Abstract
The invention provides a kind of Synthetic Aperture Radar satellite precision measure reference design method, it comprises the following steps：Step 1: set reference block respectively in four ends lateral surface region of antenna frame, and prism installation base is set on framework, controls the levelness of reference block by way of Combined machining, and boss and reference block the depth of parallelism；Step 2: leveling antenna frame, according to the reference block of its four ends, is changed by frock, on the boss that the primary standard prism of satellite is arranged on to antenna frame, and control primary standard prism with the reference block depth of parallelism.The achievable primary standard prism coordinate system of the present invention is highly consistent with loaded antennas coordinate system, directly eliminate the installation deviation between primary standard prism and loaded antennas, other precision units and loaded antennas precision etc. realize unification both with respect to the in-orbit aimed at precision to be reached of whole star on star, the transmission link of trueness error is reduced, the efficiency of whole star precision measure work is improved.
Description
Technical field
The present invention relates to radar satellite precision measure reference design method, in particular it relates to which a kind of synthetic aperture radar is defended
Star precision measure reference design method.
Background technology
The precision of loaded antennas is the crucial part for ensureing the in-orbit image quality of high-resolution satellite, and the essence of loaded antennas
Degree ensures that this is just proposed to the setting of accurate measurement process Satellite primary standard will by the installation accuracy in whole star Standard stage again
Ask.Whole star is carried out in accurate measurement work, and certain relatively fixed position is whole to set an accurate measurement prism to be used as typically on satellite
Star assembles the primary standard of accurate measurement, and the primary standard represents on the geocentric coordinate system of satellite, star other precision units and load with respect to it
Precision measure and adjustment are carried out, so as to reach that installation accuracy meets the demand of satellite attitude and orbit control subsystem.High-resolution synthesizes hole
The loaded antennas of footpath radar satellite has multiple disassembling operations during integrated and test is carried out with whole star structure,
More error components can be introduced, this setting and accurate measurement to whole star primary standard prism proposes higher requirement.Therefore, pass through
Analytic demonstration, it is the effective way for solving this problem, primary standard prism that primary standard prism, which is arranged on the framework of loaded antennas,
On framework, its coordinate system represented keeps highly consistent with the coordinate system of loaded antennas all the time, while being set on framework another
Outer two backups primary standard prism, can be carried out when primary standard prism is blocked by equipment such as frocks using backup primary standard prism
Measurement, is finally again compensated the relative deviation between primary standard prism and backup primary standard prism using mathematical measure, together
When, whole star carry out accurate measurement when, primary standard with loaded antennas it is integrated and test during, due to primary standard and backup primary standard rib
Mirror is separated with satellite platform, now, and satellite platform carries out accurate measurement using the auxiliary base prism in reference rings, and to accurate measurement knot
Fruit eliminates the relative deviation between auxiliary base prism and primary standard prism using mathematical measure, it is achieved thereby that whole star accurate measurement
Purpose.
At present, the precision reference of general satellite is arranged on the loaded cylinder of accurate measurement ring or satellite, but does not find satellite
Accurate measurement benchmark is arranged on synthetic aperture radar loaded antennas framework, and passes through primary standard and the height one of loaded antennas coordinate system
Cause to ensure the relevant report or method of deviation between elimination satellite primary standard and loaded antennas.
The content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of Synthetic Aperture Radar satellite precision measure base
Quasi- design method, it can realize the highly consistent of primary standard prism coordinate system and loaded antennas coordinate system, directly eliminate main base
Other precision units and loaded antennas precision etc. exist both with respect to whole star on installation deviation between quasi- prism and loaded antennas, star
The rail aimed at precision to be reached realizes unification, reduces the transmission link of trueness error, improves whole star precision measure work
Efficiency, the data processing in more later stage brings great convenience, and solid foundation has been laid in image quality lifting in-orbit to satellite.
According to an aspect of the present invention there is provided a kind of Synthetic Aperture Radar satellite precision measure reference design method, its
It is characterised by, comprises the following steps：
Step 1: set reference block respectively in four ends lateral surface region of antenna frame, and rib is set on framework
Mirror installation base, controls the levelness of reference block by way of Combined machining, and boss and reference block the depth of parallelism；
Step 2: leveling antenna frame, according to the reference block of its four ends, is changed by frock, by the main base of satellite
Quasi- prism is arranged on the boss of antenna frame, and control primary standard prism with the reference block depth of parallelism；
Step 3: the homonymy in the primary standard prism of antenna frame installs a backup primary standard prism again, its boss is high
Degree should be higher than that the boss for installing primary standard prism, the depth of parallelism of control backup primary standard prism and primary standard prism；
Step 4: in the additionally mounted backup primary standard prism of offside of antenna frame primary standard prism, control backup
The depth of parallelism of primary standard prism and base primary standard prism；
Step 5: setting reference plane on accurate measurement ring, auxiliary base prism is installed, adjusted by tooling device, controlled auxiliary
Help the depth of parallelism of benchmark prism and the earth level, and accurate measurement ring axis perpendicularity；
Step 6: in whole star accurate measurement, accurate measurement ring fills star and first resetted by return pin every time, then carries out primary standard prism
With the precision measure between backup primary standard prism, auxiliary base prism, primary standard prism and other accurate measurement benchmark prisms are set up
Between relation；
Step 7: during whole star accurate measurement, the precision unit of satellite carries out accurate measurement according to whole star primary standard prism；In master
When benchmark is blocked, accurate measurement is carried out using backup primary standard prism；If antenna frame is not on celestial body, using auxiliary base
Prism carries out accurate measurement；The relation that all accurate measurement relations are transferred to relative primary standard prism eventually through calculating.
Preferably, the flatness of each reference block of four ends of the antenna frame is better than 0.02mm, four benchmark
The flatness in block face in the same direction is better than 0.05mm, and the depth of parallelism of boss and reference block is superior to 0.05mm.
Preferably, the quadrature bias between six mirror normals of the primary standard prism is better than 5 ", the main base of backup
Deviation is better than 10 between three mirror normals of quasi- prism and primary standard prism are pointed to ".
Preferably, two mirror normal directions of the auxiliary base mirror in the case where accurate measurement ring is adjusted to horizontality and the earth
The depth of parallelism of level is better than 10 ", it is better than 10 with accurate measurement ring longitudinal axis orthogonal degree ".
Preferably, the satellite accurate measurement status architecture of the Synthetic Aperture Radar satellite precision measure reference design method includes
First reference block, the first backup benchmark prism installation base, antenna frame, primary standard prism installation base, the second backup benchmark
Prism installation base, the second reference block, the 3rd reference block, the 4th reference block, accurate measurement ring, auxiliary base prism, satellite platform, the
One reference block, the second reference block, the 3rd reference block and the 4th reference block are all located on four drift angles of antenna frame respectively, antenna
Framework is located at the side of primary standard prism installation base, and the first backup benchmark prism installation base is located at antenna frame side, main
Benchmark prism installation base is located at below the first backup benchmark prism installation base, and the second backup benchmark prism installation base is located at
Antenna frame side, the second backup benchmark prism installation base is located at the side of the second reference block, and antenna frame is flat positioned at satellite
Above platform, the 4th reference block is located above the side of the second backup benchmark prism installation base, satellite platform to be connected with antenna frame
Connect, the first backup benchmark prism installation base is located above the top of auxiliary base prism, accurate measurement ring to be connected with satellite platform, auxiliary
Benchmark prism is helped to be located at the side of accurate measurement ring.
Compared with prior art, the present invention has following beneficial effect：The achievable primary standard prism coordinate system of the present invention
It is highly consistent with loaded antennas coordinate system, directly eliminate on the installation deviation between primary standard prism and loaded antennas, star
Other precision units and loaded antennas precision etc. realize unification both with respect to the in-orbit aimed at precision to be reached of whole star, reduce
The transmission link of trueness error, improves the efficiency of whole star precision measure work, and the data processing in more later stage is brought greatly
Convenient, solid foundation has been laid in image quality lifting in-orbit to satellite.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the flow chart of Synthetic Aperture Radar satellite precision measure reference design method of the present invention.
Fig. 2 is the satellite load antenna frame structure of Synthetic Aperture Radar satellite precision measure reference design method of the present invention
Schematic diagram.
Fig. 3 is the satellite accurate measurement ring auxiliary base rib of Synthetic Aperture Radar satellite precision measure reference design method of the present invention
Mirror structural representation.
Fig. 4 illustrates for the satellite accurate measurement status architecture of Synthetic Aperture Radar satellite precision measure reference design method of the present invention
Figure.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that to the ordinary skill of this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
As shown in figure 1, Synthetic Aperture Radar satellite precision measure reference design method of the present invention comprises the following steps：
Step 1: set reference block respectively in four ends lateral surface region of antenna frame, and rib is set on framework
Mirror installation base, controls the levelness of reference block by way of Combined machining, and boss and reference block the depth of parallelism；
Step 2: leveling antenna frame, according to the reference block of its four ends, is changed by frock, by the main base of satellite
Quasi- prism is arranged on the boss of antenna frame, and control primary standard prism with the reference block depth of parallelism；
Step 3: the homonymy in the primary standard prism of antenna frame installs a backup primary standard prism again, its boss is high
Degree should be higher than that the boss for installing primary standard prism, the depth of parallelism of control backup primary standard prism and primary standard prism；
Step 4: in the additionally mounted backup primary standard prism of offside of antenna frame primary standard prism, control backup
The depth of parallelism of primary standard prism and base primary standard prism；
Step 5: setting reference plane on accurate measurement ring, auxiliary base prism is installed, adjusted by tooling device, controlled auxiliary
Help the depth of parallelism of benchmark prism and the earth level, and accurate measurement ring axis perpendicularity；
Step 6: in whole star accurate measurement, accurate measurement ring fills star and first resetted by return pin every time, then carries out primary standard prism
With the precision measure between backup primary standard prism, auxiliary base prism, primary standard prism and other accurate measurement benchmark prisms are set up
Between relation；
Step 7: during whole star accurate measurement, the precision unit of satellite carries out accurate measurement according to whole star primary standard prism；In master
When benchmark is blocked, accurate measurement is carried out using backup primary standard prism；If antenna frame is not on celestial body, using auxiliary base
Prism carries out accurate measurement；The relation that all accurate measurement relations are transferred to relative primary standard prism eventually through calculating.
Preferably, the flatness of each reference block of four ends of the antenna frame is better than 0.02mm, four benchmark
The flatness in block face in the same direction is better than 0.05mm, and the depth of parallelism of boss and reference block is superior to 0.05mm.
Preferably, the quadrature bias between six mirror normals of the primary standard prism is better than 5 ", the main base of backup
Deviation is better than 10 between three mirror normals of quasi- prism and primary standard prism are pointed to ".
Preferably, two mirror normal directions of the auxiliary base mirror in the case where accurate measurement ring is adjusted to horizontality and the earth
The depth of parallelism of level is better than 10 ", it is better than 10 with accurate measurement ring longitudinal axis orthogonal degree ".
As shown in Figures 2 to 4, the satellite accurate measurement shape of Synthetic Aperture Radar satellite precision measure reference design method of the present invention
State structure includes the first reference block 1, the first backup benchmark prism installation base 2, antenna frame 3, primary standard prism installation base
4th, the second backup benchmark prism installation base 5, the second reference block 6, the 3rd reference block 7, the 4th reference block 8, accurate measurement ring 9, auxiliary
Benchmark prism 10, satellite platform 11, the first reference block 1, the second reference block 6, the 3rd reference block 7 and the 4th reference block 8 are all distinguished
On four drift angles of antenna frame 3, antenna frame 3 is located at the side of primary standard prism installation base 4, the first backup benchmark
Prism installation base 2 is located at the side of antenna frame 3, and primary standard prism installation base 4 is located at the first backup benchmark prism and installs convex
The lower section of platform 2, the second backup benchmark prism installation base 5 is located at the side of antenna frame 3, the second backup benchmark prism installation base 5
Positioned at the side of the second reference block 6, antenna frame 3 is located at the top of satellite platform 11, and the 4th reference block 8 is located at the second backup benchmark
The side of prism installation base 5, the top of satellite platform 11 is connected with antenna frame 3, the first backup benchmark prism installation base 2
In the top of auxiliary base prism 10, the top of accurate measurement ring 9 is connected with satellite platform 11, and auxiliary base prism 10 is located at accurate measurement ring 9
Side.
Specifically, as shown in Figure 2 to 4, the accuracy test benchmark here in conjunction with certain Synthetic Aperture Radar satellite, which is set, comes
It is described in detail.
SAR antenna frames size is 2900mm × 1200mm × 200mm carbon fiber rectangular parallelepiped structure.Four ends of framework
Three, portion lateral surface is provided with aluminium alloy reference block, by the Combined machining on lathe, controls the flatness of each reference block
0.02mm is superior to, the flatness in four reference block faces in the same direction is better than 0.05mm.On the frame there is provided three prisms are installed
Aluminium alloy boss, two of which boss is located at the same side, and the depth of parallelism of each boss and reference block is superior to 0.05mm；Homonymy
In two boss, the boss positioned at edge is compared with positioned at the middle high 20mm of boss.
Antenna frame is placed in marble platform of the levelness better than 0.02mm, on the centre position boss of framework
The quadrature bias installed between 1 accurate measurement prism, six mirror normals of prism is better than 5 ", changed by accurate measurement frock, and
Shovel is taken to scrape the mode such as boss mounting surface and pad pad, the depth of parallelism of control primary standard prism and reference block normal is superior to 10 ".
Under same condition, 1 accurate measurement prism, the six of each prism are respectively mounted on two other boss of antenna frame
Quadrature bias between individual mirror normal is superior to 5 ", by the real-time accurate measurement of electronic theodolite system, and take shovel to scrape boss peace
The mode such as dress face and pad pad, control two backup primary standard prisms, three mirror normals three mirrors corresponding with primary standard prism
The depth of parallelism of face normal is superior to 10 ".
Be symmetrical arranged two reference planes around ring axis on general accurate measurement ring, by accurate measurement turntable by accurate measurement ring adjust to
Horizontality, the quadrature bias installed on accurate measurement face between auxiliary base prism, six mirror normals of benchmark prism is better than
5 ", while controlling two mirror normal directions of auxiliary base prism to be better than 10 with the depth of parallelism of the earth level ", and and accurate measurement
The perpendicularity of ring axis is better than 10 ".
In whole star accurate measurement, accurate measurement ring fills star and first resetted by return pin every time, then carries out primary standard prism and backup
Precision measure between primary standard prism, auxiliary base prism, sets up between primary standard prism and other accurate measurement benchmark prisms
Relation.
During whole star accurate measurement, the precision unit of satellite carries out accurate measurement according to whole star primary standard prism；In primary standard quilt
When blocking, accurate measurement is carried out using backup primary standard prism；If antenna frame is not on celestial body, opened using auxiliary base prism
Open up accurate measurement；All accurate measurement relations are changed to the accuracy relation of relative primary standard prism eventually through calculating.
By the design method of the precision measure benchmark, by the measuring basis of all precision of satellite with loaded antennas coordinate
The primary standard prism opening relationships that system is directly connected, has accomplished the high unity of whole star precision reference, has reduced primary standard prism
Set and measurement fixing link changes the error introduced, the efficiency of whole star precision measure work is improved, more at later data
That manages brings great convenience.
In summary, the achievable primary standard prism coordinate system of the present invention and loaded antennas coordinate system is highly consistent, directly
Eliminate other precision units and loaded antennas precision etc. on the installation deviation between primary standard prism and loaded antennas, star homogeneous
Unification is realized for the in-orbit aimed at precision to be reached of whole star, the transmission link of trueness error is reduced, whole star essence is improved
The efficiency of degree measurement work, the data processing in more later stage brings great convenience, and image quality lifting in-orbit to satellite is laid
Solid foundation.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (5)
1. a kind of Synthetic Aperture Radar satellite precision measure reference design method, it is characterised in that comprise the following steps：
Step 1: setting reference block respectively in four ends lateral surface region of antenna frame, and prism is set to pacify on framework
Fill boss, control the levelness of reference block by way of Combined machining, and boss and reference block the depth of parallelism；
Step 2: leveling antenna frame, according to the reference block of its four ends, is changed by frock, by the primary standard rib of satellite
Mirror is arranged on the boss of antenna frame, and control primary standard prism with the reference block depth of parallelism；
Step 3: the homonymy in the primary standard prism of antenna frame installs a backup primary standard prism again, its boss height should
Higher than the boss for installing primary standard prism, the depth of parallelism of control backup primary standard prism and primary standard prism；
Step 4: in the additionally mounted backup primary standard prism of offside of antenna frame primary standard prism, the main base of control backup
The depth of parallelism of quasi- prism and base primary standard prism；
Step 5: setting reference plane on accurate measurement ring, auxiliary base prism is installed, adjusted by tooling device, control auxiliary base
The depth of parallelism of quasi- prism and the earth level, and accurate measurement ring axis perpendicularity；
Step 6: in whole star accurate measurement, accurate measurement ring fills star and first resetted by return pin every time, then carry out primary standard prism with it is standby
Precision measure between part primary standard prism, auxiliary base prism, sets up between primary standard prism and other accurate measurement benchmark prisms
Relation；
Step 7: during whole star accurate measurement, the precision unit of satellite carries out accurate measurement according to whole star primary standard prism；In primary standard
When being blocked, accurate measurement is carried out using backup primary standard prism；If antenna frame is not on celestial body, using auxiliary base prism
Carry out accurate measurement；The relation that all accurate measurement relations are transferred to relative primary standard prism eventually through calculating.
2. Synthetic Aperture Radar satellite precision measure reference design method according to claim 1, it is characterised in that described
The flatness of each reference block of four ends of antenna frame is better than 0.02mm, and the flatness in four reference block faces in the same direction is better than
The depth of parallelism of 0.05mm, boss and reference block is superior to 0.05mm.
3. Synthetic Aperture Radar satellite precision measure reference design method according to claim 1, it is characterised in that described
Quadrature bias between six mirror normals of primary standard prism is better than 5 ", the backup primary standard prism and primary standard prism
Deviation is better than 10 between three mirror normals are pointed to ".
4. Synthetic Aperture Radar satellite precision measure reference design method according to claim 1, it is characterised in that described
Two mirror normal directions and the depth of parallelism of the earth level of the auxiliary base mirror in the case where accurate measurement ring is adjusted to horizontality are better than
10 ", it is better than 10 with accurate measurement ring longitudinal axis orthogonal degree ".
5. Synthetic Aperture Radar satellite precision measure reference design method according to claim 1, it is characterised in that described
Satellite accurate measurement status architecture includes the first reference block, the first backup benchmark prism installation base, antenna frame, primary standard prism peace
Fill boss, the second backup benchmark prism installation base, the second reference block, the 3rd reference block, the 4th reference block, accurate measurement ring, auxiliary
Benchmark prism, satellite platform, the first reference block, the second reference block, the 3rd reference block and the 4th reference block are all located at antenna respectively
On four drift angles of framework, antenna frame is located at the side of primary standard prism installation base, and the first backup benchmark prism is installed convex
Platform is located at antenna frame side, and primary standard prism installation base is located at below the first backup benchmark prism installation base, and second is standby
Part benchmark prism installation base is located at antenna frame side, and the second backup benchmark prism installation base is located at the one of the second reference block
Side, antenna frame is located above satellite platform, and the 4th reference block is located at the side of the second backup benchmark prism installation base, satellite
It is connected above platform with antenna frame, the first backup benchmark prism installation base is located at the top of auxiliary base prism, accurate measurement ring
Top is connected with satellite platform, and auxiliary base prism is located at the side of accurate measurement ring.
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| CN110836635A (en) * | 2019-09-30 | 2020-02-25 | 上海航天设备制造总厂有限公司 | Measuring reference establishing and measuring method for light honeycomb sandwich box type structure |
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| CN107300701B (en) | 2020-05-29 |
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