Real-time maintaining method of ideal shape surface of active main reflector antenna based on datum point

Abstract

The present invention belongs to the technical field of a radar antenna, and especially relates to an active main reflection surface antenna ideal profile real-time maintenance method based on a reference point. The active main reflection surface antenna ideal profile real-time maintenance method based on a reference point employs a set of laser distance measurement and angle measurement devices to achieve displacement detection of a main reflection surface and a secondary reflection surface of a reflection surface antenna at the same time with no need for consideration of the forming factorsof the deformation of the antenna. The active main reflection surface antenna ideal profile real-time maintenance method is suitable for a static load such as a gravitational load, steady state wind load and sleet, is suitable for a variable load, such as a temperature load, and is suitable for processing of installation errors. The closed-loop real-time regulation of the reflection surface and the real-time maintenance of the active main reflection surface antenna ideal profile are achieved.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, in particular to a reference point-based method for maintaining the ideal shape of an active main reflector antenna in real time, which is applied to the real-time maintenance of the ideal shape of the active main reflector antenna during service. Background technique [0002] Reflector antennas are widely used in deep space exploration, radio astronomy and other fields. With the development of technology, large-aperture and high-frequency bands are the main development directions. The larger the aperture, the higher the frequency band, and the more prominent the performance of the reflector antenna. For example, the 100-meter fully movable radio telescope built by the Federal Republic of Germany in the 1970s, the Green Bank 100-meter radio telescope built by the United States in 2000, and the 65-meter Tianma telescope built by China in 2012 can work in the millimeter wave band (30GHz-300G...

AI Technical Summary

Problems solved by technology

At present, the adjustment of the sub-reflector in engineering mostly adopts the empirical method. By measuring the far-field pattern of the antenna, according to the symmetry performance and gain value of the sidelobe of the far-field pattern, the adjustment process of the sub-reflector is guided according to experience. Usually, the number of adjustments is large. and time-consuming

Obviously, the shape and surface adjustment of the active main reflector antenna needs to take into account both the adjustment of the active main reflector and the adjustment of the sub-reflector. At present, the closed-loop real-time adjustment of the reflector has not yet been realized.

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