Rapid constructing method for temperature of reflector antenna based on structural thermal analogy

Abstract

The invention discloses a rapid constructing method for temperature of a reflector antenna based on structural thermal analogy. The method comprises the steps that a structural scheme of the reflectorantenna, a layout scheme of temperature sensors and a distribution temperature information database of an antenna temperature field are determined; the antenna is divided into N annular domains; thedirectional pitching angle of the antenna and the angle between solar rays and a reflector are determined; the number and positions of the temperature sensors in the annular domains are determined, and actual numerical values under the current working condition are extracted; a temperature field of the annular domains is determined; an initial temperature field and an initial temperature value ofthe annular domains under the current working condition are calculated; analogic coefficienTS of the annular domains of the antenna are calculated, the initial temperature field is revised and the actual temperature field of the annular domains is reconstructed; whether or not a variable i is greater than N is determined, and the actual temperature field of the reflector antenna is reconstructed.The method has the advantages of being simple in calculation method and smaller in calculation amount, a large amount of time spent on simulating a finite element model is avoided, rapidness of acquiring the actual temperature field of a reflector antenna structure is ensured, and the method facilitates improvement of antenna reflector accuracy and comprehensive performance of the antenna.

Description

technical field [0001] The invention belongs to the technical field of antennas, and specifically relates to a method for quickly reconstructing the temperature of a reflector antenna based on structural thermal analogy, which is used to quickly reconstruct the actual temperature field of the reflector antenna structure, and has important academic significance and engineering application value. Background technique [0002] At present, reflector antennas in different regions, such as road-based reflector antennas, sea-based reflector antennas, and space-borne reflector antennas, all play a key role in their respective fields. Great contributions have been made to national defense and other fields. However, as the aperture becomes larger, the frequency band becomes higher, and the surface of the reflector becomes more precise, the reflector antenna exposed to the environment will be affected by various boundary conditions for a long time, causing the temperature of the antenn...

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Problems solved by technology

Due to the fact that the real-time changes in the actual temperature field of the antenna are multi-, complex, and variable, it is difficult to accurately obtain the actual temperature field that changes in real time if only relying on software simulation. If only relying on sensors to collect temperature information, a large number of temperature sensors are required , especially for large-scale reflector antennas, the accuracy and real-time performance of the actual temperature field cannot be guaranteed, either from an economic point of view or from the evaluation of the reliability of a large number of temperature sensors. In addition, after collecting the temperature sensor information, interpolation The actual temperature field of the entire antenna can only be obtained through calculation, and the resulting error is relatively large

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