CN108666766B - Method for rapidly calculating influence of structural deformation of large-caliber reflector antenna on electrical performance - Google Patents
Method for rapidly calculating influence of structural deformation of large-caliber reflector antenna on electrical performance Download PDFInfo
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- CN108666766B CN108666766B CN201810445637.XA CN201810445637A CN108666766B CN 108666766 B CN108666766 B CN 108666766B CN 201810445637 A CN201810445637 A CN 201810445637A CN 108666766 B CN108666766 B CN 108666766B
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- reflector antenna
- reflector
- structural deformation
- directional diagram
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Abstract
The invention relates to a method for rapidly calculating the influence of structural deformation of a large-aperture reflector antenna on electrical performance, which decomposes the structural deformation of the large-aperture reflector antenna into the displacement and the rotation of each panel forming a reflector, calculates the scattering directional diagram of each panel under an ideal condition, corrects the scattering directional diagram of each panel according to the displacement and the rotation of each panel, superposes the corrected scattering directional diagrams of each panel to obtain the directional diagram of the antenna after structural deformation, and further calculates the change of each technical index of the reflector antenna. The calculation time of analysis is effectively shortened by changing the two-dimensional integral with large scale into superposition. The method is suitable for analyzing the influence of the structural deformation of various large-caliber reflector antennas on the electrical property.
Description
Technical Field
The invention discloses a method for rapidly calculating the influence of structural deformation of a large-aperture reflector antenna on electrical property, which can effectively shorten the calculation time of the influence of the structural deformation of the antenna on the electrical property, thereby realizing the electromechanical integration optimization of the large-aperture reflector antenna and being suitable for various large-aperture reflector antennas.
Background
The reflector antenna is a typical high gain antenna form, and has wide application. The reflecting surface is an important component of a reflecting surface antenna, which belongs to electrical components, on the one hand, which are energy collectors/radiators, and on the other hand, which also belongs to structural components, and is greatly influenced by the structural form of the antenna and the external environment. The interface between the electrical performance and the structural performance is the surface shape precision and the relative position relation.
At present, the analysis of the influence of environmental load on the performance of a reflector antenna generally uses a Rutz formula to estimate the antenna efficiency loss caused by surface type precision error, and the influence on indexes such as side lobe, cross polarization and the like cannot be effectively analyzed; or based on the optimal fit surface, the reflecting surface is only the displacement and rotation of the ideal reflecting surface, and has a certain difference compared with the actual reflecting surface, and particularly, the error estimation of the pointing accuracy is difficult to reflect the real situation.
Although the physical optics method can accurately reflect the actual influence of the environmental load on the performance of the antenna and can obtain the influence of the environmental load on various performance indexes of the antenna, the process consumes several or even tens of hours for the electromechanical integration analysis of the large-caliber reflector antenna, so that the effective structural optimization design cannot be carried out. Therefore, a technical study on the rapid analysis of the structural deformation influence of the large-aperture reflector antenna needs to be developed, the single electrical property calculation time is shortened to the order of minutes, and a technical basis is established for the electromechanical integration optimization design of the large-aperture reflector antenna.
Disclosure of Invention
The invention aims to avoid the defects in the background art and provides a rapid and comprehensive method for rapidly calculating the influence of the structural deformation of a large-caliber reflector antenna on the electrical property.
The technical scheme adopted by the invention is as follows:
the method for rapidly calculating the influence of the structural deformation of the large-caliber reflector antenna on the electrical property comprises the following steps:
(1) calculating and recording a scattering directional diagram corresponding to each angle of each antenna panel forming the reflecting surface under an ideal condition;
(2) determining the maximum displacement and rotation of each antenna panel under various working conditions according to the result of the mechanical analysis of the reflector antenna structure, and respectively calculating the variation of the amplitude and phase of the scattering directional diagram of each antenna panel caused by different displacement and rotation in the range of the maximum displacement and rotation so as to determine the correction factor of the scattering directional diagram of each antenna panel;
(3) determining the actual displacement and rotation of each antenna panel based on the result of the mechanical analysis of the reflector antenna structure, and correcting the scattering directional diagram of each antenna panel according to the correction factor;
(4) superposing each corrected antenna panel to obtain a directional diagram of the reflector antenna after the structure is deformed;
(5) calculating required related technical indexes according to the directional diagram of the reflector antenna after the structure is deformed;
and the quick calculation of the influence of the structural deformation of the large-aperture reflector antenna on the electrical performance is completed.
Wherein, the correction factor of the panel scattering directional diagram is described by a fitting function method or determined by an interpolation method.
Compared with the background technology, the invention has the following advantages:
1. the two-dimensional integral of the whole reflecting surface required by the accurate calculation of the directional diagram of the deformed large-aperture antenna structure is changed into the two-dimensional integral result of each panel, the two-dimensional integral result is corrected and accumulated, and the calculation time is at least shortened by 2-3 orders of magnitude by changing the integral into superposition.
2. When each structural deformation analysis is carried out, only the two-dimensional integral of the known panel needs to be corrected, and the two-dimensional integral of the panel does not need to be carried out again, so that the method is very suitable for multiple analyses, such as mechatronic optimization.
Drawings
Fig. 1 is a schematic of the principles of the present invention.
Fig. 2 is a flow chart of the present invention.
Detailed Description
Referring to fig. 1 and 2, a method for rapidly calculating the influence of structural deformation of a large-aperture reflector antenna on electrical performance includes the following steps:
(1) calculating and recording a scattering directional diagram corresponding to each angle of each antenna panel forming the reflecting surface under an ideal condition;
(2) determining the maximum displacement and rotation of each antenna panel under various working conditions according to the result of the mechanical analysis of the reflector antenna structure, and respectively calculating the variation of the amplitude and phase of the scattering directional diagram of each antenna panel caused by different displacement and rotation in the range of the maximum displacement and rotation so as to determine the correction factor of the scattering directional diagram of each antenna panel; the correction factor of the panel scattering direction diagram is described by a fitting function method or determined by an interpolation method.
(3) Determining the actual displacement and rotation of each antenna panel based on the result of the mechanical analysis of the reflector antenna structure, and correcting the scattering directional diagram of each antenna panel according to the correction factor;
(4) superposing each corrected antenna panel to obtain a directional diagram of the reflector antenna after the structure is deformed;
(5) calculating required related technical indexes according to the calculated directional diagram of the deformed reflector antenna;
and the quick calculation of the influence of the structural deformation of the large-aperture reflector antenna on the electrical performance is completed.
Claims (2)
1. The method for rapidly calculating the influence of the structural deformation of the large-aperture reflector antenna on the electrical property is characterized by comprising the following steps of:
(1) calculating and recording a scattering directional diagram corresponding to each angle of each antenna panel forming the reflector antenna under an ideal condition;
(2) determining the maximum displacement and rotation of each antenna panel under various working conditions according to the result of the mechanical analysis of the reflector antenna structure, and respectively calculating the variation of the amplitude and phase of the scattering directional diagram of each antenna panel caused by different displacement and rotation in the range of the maximum displacement and rotation so as to determine the correction factor of the scattering directional diagram of each antenna panel;
(3) determining the actual displacement and rotation of each antenna panel based on the result of the mechanical analysis of the reflector antenna structure, and correcting the scattering directional diagram of each antenna panel according to the correction factor;
(4) superposing the corrected scattering directional diagrams of each antenna panel to obtain the directional diagrams of the reflector antennas after the structure is deformed;
(5) calculating required related technical indexes according to the directional diagram of the reflector antenna after the structure is deformed;
and the quick calculation of the influence of the structural deformation of the large-aperture reflector antenna on the electrical performance is completed.
2. The method for rapidly calculating the influence of the structural deformation of the large-caliber reflector antenna on the electrical property according to claim 1, wherein the method comprises the following steps: the correction factor of each antenna panel scattering pattern is described by a fitting function or determined by an interpolation method.
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| CN201810445637.XA CN108666766B (en) | 2018-05-11 | 2018-05-11 | Method for rapidly calculating influence of structural deformation of large-caliber reflector antenna on electrical performance |
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| CN201810445637.XA CN108666766B (en) | 2018-05-11 | 2018-05-11 | Method for rapidly calculating influence of structural deformation of large-caliber reflector antenna on electrical performance |
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| CN108666766B true CN108666766B (en) | 2020-06-09 |
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| CN112329288B (en) * | 2020-10-28 | 2022-08-12 | 中国电子科技集团公司第五十四研究所 | Structure electromagnetic integration analysis method of reflector antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0471362A2 (en) * | 1990-08-15 | 1992-02-19 | Mitsubishi Denki Kabushiki Kaisha | Reflector with passive and active temperature compensation |
| CN106055902A (en) * | 2016-06-03 | 2016-10-26 | 西安电子科技大学 | Interval analysis method of electrical performance of reflector antenna under panel random and system error |
| CN106096208A (en) * | 2016-06-30 | 2016-11-09 | 西安电子科技大学 | The Forecasting Methodology of reflector antenna power radiation pattern excursion |
| CN106202657A (en) * | 2016-06-30 | 2016-12-07 | 西安电子科技大学 | The electrical behavior prediction method of Blast Loading lower plane array antenna |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0656620B2 (en) * | 1987-06-10 | 1994-07-27 | 日本電気株式会社 | Pattern difference detector |
| JP5174700B2 (en) * | 2009-01-28 | 2013-04-03 | 三菱電機株式会社 | Antenna device |
| CN102998540B (en) * | 2012-10-22 | 2015-01-07 | 西安电子科技大学 | Forecasting method for influences, on electrical performances, of array surface morphology of conformal load-bearing microstrip antenna |
| CN105576385B (en) * | 2016-02-02 | 2018-05-25 | 西安电子科技大学 | Towards gain method of adjustment is rotated with being directed toward large-scale deformation parabola antenna panel and coincideing |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0471362A2 (en) * | 1990-08-15 | 1992-02-19 | Mitsubishi Denki Kabushiki Kaisha | Reflector with passive and active temperature compensation |
| CN106055902A (en) * | 2016-06-03 | 2016-10-26 | 西安电子科技大学 | Interval analysis method of electrical performance of reflector antenna under panel random and system error |
| CN106096208A (en) * | 2016-06-30 | 2016-11-09 | 西安电子科技大学 | The Forecasting Methodology of reflector antenna power radiation pattern excursion |
| CN106202657A (en) * | 2016-06-30 | 2016-12-07 | 西安电子科技大学 | The electrical behavior prediction method of Blast Loading lower plane array antenna |
Non-Patent Citations (1)
| Title |
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| 表面误差对反射面天线电性能的影响;宋立伟等;《电子学报》;20091231;全文 * |
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