A Pointing Error Compensation Method for Anti-wind Disturbance of Large Beam Waveguide Antenna
A beam waveguide antenna, pointing error technology, applied in antennas, electrical components and other directions, can solve problems such as limited effect
Inactive Publication Date: 2016-06-29
XIDIAN UNIV
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Problems solved by technology
[0003] For how to reduce the influence of external loads on antenna pointing control, predecessors have made a lot of contributions in terms of accurately understanding the factors causing pointing errors and advanced control theory, and have reduced pointing errors to a certain extent, but the effect limited; and from the existing structure of the antenna, there is no innovation on how to reduce the pointing error caused by the external load
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[0081] see figure 1 , and combined with Figure 2 to Figure 7 , the present invention comprises the following steps:
[0082] (1) Calculate the lateral displacement required for the equivalent feed source location;
[0083] (2) Determine the mirror combination structure of the beam waveguide system of the antenna, and use the mirror combination structure to preliminarily estimate the required displacement of the feed source virtual image mirror surface;
[0084] The determined reflector combination is a double paraboloid combination, which includes three plane reflectors; the feed source O passes through reflector one 1, reflector two 2, reflector three 3, reflector four 4 and reflector five 5, etc. Effect feed point B 1 , wherein reflector one 1, reflector three 3 and reflector five 5 are plane mirrors farther and farther away from feed source 6 successively, reflector two 2 and reflector four 4 are parabolic mirrors; reflector four 4 which are parabolic mirrors It can ro...
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The invention belongs to the technical field of antennas, and particularly relates to an anti-wind-disturbing pointing error compensation method for a large beam waveguide antenna. The method includes the steps of (1) calculating a transverse displacement needed by the position of an equivalent feed source, (2) determining a reflection mirror combination of an antenna beam waveguide system and estimating a displacement needed by a mirror surface of a feed-source virtual image primarily, (3) specifically determining sizes of mirror surfaces of all reflection mirrors according to the displacement needed by the mirror surface of the feed-source virtual image and the stroke of a driver, (4) determining the structure of the first reflection mirror, and calculating the displacement needed by azimuth direction drive of the first reflection mirror according to the displacement needed by the feed-source virtual image in an azimuth direction, and (5) calculating the displacement needed by pitching direction drive of the first reflection mirror according to the displacement needed by a feed-source virtual image in the pitching direction. According to the method, the position of the equivalent feed source in a primary surface system is changed in the way that the positions of the mirror surfaces in the beam waveguide system are adjustable in real time, and accordingly pointing deviation of the antenna caused by deformation of the primary surface system as a result of wind disturbing is compensated and pointing accuracy of the antenna is improved.
Description
technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a pointing error compensation method for anti-wind disturbance of a large beam waveguide antenna. Background technique [0002] Large-scale reflector antennas are widely used in satellite communications, deep space exploration and other fields due to their advantages of high irradiation efficiency and low edge leakage. "For a 65-meter-caliber antenna, its pointing accuracy requires an error of less than 0.01°. Only when the precision meets the requirements can the efficiency of the antenna aperture be brought into play. As the aperture continues to increase, the antenna structure will be subjected to various loads such as self-weight, wind load, rain and snow, etc. As a result, the main surface system of the antenna is flexibly deformed, resulting in a deviation of pointing, and the deviation of pointing will cause the deviation of the electrical performance of the a...
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IPC IPC(8): H01Q3/20
Inventor 黄进张洁宋瑞雪邱丽丽
Owner XIDIAN UNIV