Load-bearing cylinder main support structure of large off-axis three-mirror space remote sensing camera

Abstract

The main bearing structure of the large-scale off-axis three-mirror space remote sensing camera involves the field of space optical remote sensing technology. It solves the problem of large aspect ratios of the main, third and folding mirrors of the camera due to the characteristics of the long focal length and wide field of view of the existing optical system. Due to the large mass, the supporting rigidity of the camera mirror assembly is low and the size envelope is too large, including the front frame, the rear frame, the main load-bearing cylinder, the truss rod assembly and the rib assembly; the main load-bearing cylinder and the front frame and the rear frame All are connected by screws; the truss rod assembly includes two symmetrically arranged truss rods, the upper end of each truss rod is positioned and connected with the front frame, and the lower end of each truss rod is positioned and connected with the rear frame; And the upper end of the rib assembly is connected with the front frame by a titanium alloy joint; the joints of the front frame, the load-bearing tube, the rear frame and the truss rod of the present invention are all in the form of plane assembly, which greatly reduces the difficulty of assembly, and at the same time greatly reduces the production cycle and manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of space optical remote sensing, in particular to a load-bearing cylinder-type main support structure of a large off-axis three-mirror camera. Background technique [0002] At present, a large off-axis three-mirror space remote sensing camera with a long focal length and a wide field of view requires its main support structure to be light in weight, high in rigidity, and good in stability. Large-scale off-axis three-mirror space remote sensing cameras mostly use a truss rod-type main support structure, which has the disadvantages of heavy mass and large camera envelope size. The use of a load-bearing cylinder-type main support structure can reduce the envelope size of the camera and improve the camera. lightweight rate. The support form of the load-bearing cylinder has the characteristics of small envelope size, so smaller rockets can be used for launch, which greatly reduces the launch cost. The disadvant...

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Problems solved by technology

[0005] The present invention aims to solve the existing problems of low support rigidity and excessively large size envelope of the camera mirror assembly caused by the characteristics of the long focal length and wide field of view of the optical system, which cause the main, third, and folding mirrors of the camera to have large aspect ratios and large masses. A load-bearing cylinder-type main support structure of a large off-axis three-mirror space remote sensing camera

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