A Secondary Reflector Position Compensation Method for Thermally Deformed Large Dual-Reflector Antenna
A dual-reflector and sub-reflector technology, used in antennas, special data processing applications, instruments, etc., can solve the problems of high compensation and calculation cost, difficult to apply effectively, and unable to reflect the deformation of the reflector.
Inactive Publication Date: 2016-01-06
XIDIAN UNIV
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Problems solved by technology
However, most researchers analyze the deformation of the deformed double-reflector antenna. The mathematical expressions obtained are not only cumbersome and complicated to solve, but also cannot reflect the real deformation of the reflector. High cost, difficult to effectively apply
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[0054] The present invention will be described in further detail below with reference to the accompanying drawings.
[0055] A method for compensating the position of the sub-reflector of a thermally deformed large double-reflector antenna is invented. The steps of the method are as follows: figure 1 Shown:
[0056] Step 1 Establish the finite element model of the undeformed antenna, extract the unit information, node coordinates of the secondary reflector and the node coordinates of the main reflector
[0057] According to the structural parameters, operating frequency and material properties of the undeformed double-reflector antenna, the finite element model of the undeformed double-reflector antenna is established in ANSYS, figure 2 It is the finite element model of the undeformed dual-reflector antenna established in ANSYS. The unit type of the main and sub-reflector panels of the dual-reflector antenna is Shell63, the side length of the unit is 100mm, and the unit sha...
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The invention discloses a compensation method of an auxiliary reflective surface position of a large-scale thermal deformation double-reflector antenna, mainly solving the problem that electrical property is reduced due to temperature deformation of the double-reflector antenna. The technical scheme comprises: (1) according to antenna structural parameters, an antenna finite element model is established; (2) deformed node coordinates are calculated after temperature loads are loaded; (3) according to the deformed main reflective surface information, a deformed main reflective surface electromagnetic model is built; (4) in the deformed main reflective surface electromagnetic model, the extracted peak coordinate of a deformed auxiliary reflective surface is taken as a benchmark, a deformed auxiliary reflective surface electromagnetic model is built, and electrical property is calculated when compensation does not exist; (5) an equivalent feed source is used for replacing a solid feed source and the auxiliary reflective surface; (6) deformation parameters are optimized by a genetic algorithm, the auxiliary reflective surface position after compensation is solved by the obtained position of the equivalent feed source, and electrical property is calculated when compensation exists; (7) if the enhanced amounts of the electrical property before and after compensation meet the requirement, the needed electrical property is obtained; if not, the parameters are redesigned and optimized, and then calculation is carried out till the requirement is met.
Description
technical field [0001] The invention belongs to the technical field of antennas, in particular to a method for compensating the position of a sub-reflector of a thermally deformed large-scale double-reflector antenna, which is used to guide the adjustment of the position of the sub-reflector of a deformed large-scale double-reflector antenna so that its electrical performance can be optimized. Background technique [0002] As large-aperture, high-frequency reflector antennas are increasingly widely used in communication and space exploration, the relationship between antenna structure and electromagnetic performance is getting closer. The small deformation of the reflective surface caused by such effects will also have a serious impact on the electrical performance of the high-frequency antenna. In the past, the root mean square error of the processed reflective surface surface was calculated from the acceptable electrical performance loss index through the Ruze formula. Wit...
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IPC IPC(8): G06F17/50H01Q19/19H01Q15/16
Inventor 王从思李辉李兆刘鑫王伟锋康明魁王伟朱敏波陈光达段宝岩黄进保宏李江江
Owner XIDIAN UNIV