Large-caliber infrared telescope adjustable supporting device based on gradient type porous structure

Abstract

The invention discloses a large-caliber infrared telescope adjustable supporting device based on a gradient type porous structure. A prior large-caliber infrared telescope supporting device cannot beadjusted. And large assembly stress and residual stress exist. The device comprises a flexible unit, a supporting base and a fixing unit. The flexible unit comprises a top supporting disc, a flexiblesupporting column and a bottom supporting disc; the two ends of the flexible supporting column are respectively and fixedly connected with the center positions of the top supporting disc and the bottom supporting disc. The flexible supporting column comprises a top heat insulation block, a flexible supporting block and a bottom heat insulation block. The top heat insulation block is provided witha top heat insulation hole. The aperture of the top heat insulation hole gradually increases in the direction from the outer end to the inner end of the top heat insulation block. The bottom heat insulation block is provided with a bottom heat insulation hole. The aperture of the bottom heat insulation hole gradually increases in the direction from the outer end to the inner end of the bottom heatinsulation block. According to the invention, the contraction amount of the shape memory alloy can be changed by adjusting the magnitude of the input current, so that the spatial pose of the large-caliber reflector is adjusted.

Description

technical field [0001] The invention belongs to the technical field of large-diameter infrared telescopes, and in particular relates to an adjustable support device for large-diameter infrared telescopes based on a gradient porous structure. Background technique [0002] With the continuous development of science and technology and the continuous improvement of the requirements for earth observation, in order to obtain high-resolution and wide-coverage spatial resolution capabilities, the aperture of infrared telescopes continues to increase. As the aperture of the telescope increases, its light-gathering ability increases, and the resulting thermal effect has an increasingly serious impact on the surface shape accuracy of the mirror, resulting in a decrease in the imaging quality of the infrared telescope. Therefore, the telescope needs to be cooled. Since the overall structure of the solar telescope is too large, local cooling is currently used to control the temperature o...

AI Technical Summary

Problems solved by technology

[0006] (1) A slot at one position can only produce flexibility in one direction. In order to have flexibility in multiple directions, multiple slots must be provided

However, multiple slots easily lead to different flexible centers of rotation of the flexible support structure in different directions, which in turn affects the surface shape accuracy of the mirror.

[0007] (2) The flexible support structure of the reflector is generally connected to the reflector through the taper sleeve, which increases the weight and assembly stress of the reflector assembly

[0009] (4) When the flexible joint and the connecting platform are assembled, the assembly stress will be generated due to the non-coplanarity of the three flexible joints and the non-coplanar connecting holes on the connecting platform, which will affect the imaging accuracy of the mirror

[0010] (5) Due to the temperature difference between the reflector and the connecting boss, heat transfer occurs and the bottom support frame is deformed due to temperature changes

[0011] (6) The flexible support structure changes due to various complex environmental factors such as gravity, temperature changes, and external loads, and intelligent adjustment of the structure cannot be realized

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