Manufacturing method for temperature adaptive reflecting surface regulating component

Abstract

The invention discloses a method for manufacturing a temperature self-adaptation reflecting surface adjusting component and relates to technology for manufacturing the temperature self-adaptation reflecting surface adjusting component in the field of reflecting surface antenna. The method adopts a principle that a single-degree-of-freedom adjusting component and a two-degree-of-freedom adjusting component are combined to carry out automatic adjustment on temperature difference thermal deformation between different materials and achieves the adjustment of temperature self-adaptation of a reflecting surface of the antenna. The method is suitable for unit adjustment of the reflecting surface antenna with large aperture, large temperature-difference working environment and high precision, has the characteristics that the adjusting component has simple structure, light weight, easy processing, convenient adjustment, low price and cost, stable and reliable performance and the like, is suitable for manufacturing the adjusting component of the reflecting surface of various high-precision antennas under an application environment of large aperture, large temperature difference and high-frequency band and is in particular suitable for manufacturing the adjusting component of a high-precision main reflecting surface and a high-precision auxiliary reflecting surface for various reflecting surface antennas with the aperture of more than 25 meters, temperature difference of the working environment of more than 50 DEG C and working frequency of more than Ka frequency band.

Description

technical field [0001] The invention relates to a method for manufacturing a temperature-adaptive reflective surface adjustment component in the field of reflective surface antennas, and is particularly suitable for working in a large-diameter, large-temperature-difference working environment and working in a high-frequency band, especially when the antenna diameter is greater than 25 meters and the temperature difference in the working environment is within Various forms of reflector antennas above 50°C and operating frequency above the Ka frequency band are used as adjustment components for high-precision main and secondary reflectors. Background technique [0002] As the operating frequency of the antenna becomes higher and higher, the requirements for the accuracy of the reflector (usually described by the surface root mean square value σ) are correspondingly higher and higher. Among the factors that affect the accuracy σ of the reflector, in addition to manufacturing and...

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Problems solved by technology

[0006] c. The back frame and the reflective surface are made of different materials, and under the traditional rigid connection constraints, the resulting deformation is uncoordinated.

[0007] Theoretical and calculation results show that although the first two factors cannot be controlled by humans, they have little effect on the overall accuracy σ of the reflective surface because of the same material and relatively uniform thermal deformation, and do not constitute the main factor. Among the factors, due to the different materials of the back frame and the reflecting surface unit, the linear expansion coefficients of the materials are different, but the rigid connection method used between the two makes the deformation of the relatively weak aluminum reflecting surface unit yield to the relatively weak rigidity. The strong steel back frame is deformed, which causes the deterioration of the accuracy σ of the reflective surface

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