A high-precision and high-stability mirror adjustment device based on flexible hinges

Abstract

The invention discloses a high-precision and high-stability reflector adjustment device based on a flexible hinge, which includes at least three flexible support mechanisms, the flexible support mechanisms have the same structure, and include a motor, a flexible hinge, a differential screw reducer and a displacement sensor. At both ends of the shaft, the motor is fixedly connected to the flexible hinge at the connection with the shell of the differential thread reducer. The shells of the differential thread reducer can slide relative to each other. The shape of the flexible hinge is an octagonal structure with four sides in the orthogonal direction. It is a non-deformable mounting surface, and the other four surfaces of the flexible hinge are deformable thin plate structures; the motor drives the differential screw reducer shell to move axially, and then drives the flexible hinge to change the angle of the deformable thin plate, realizing the non-deformable mounting surface of the flexible hinge. The radial movement realizes the adjustment of the mirror mounted on the non-deformable mounting surface through the three-dimensional adjustment between the flexible supporting mechanisms.

Description

technical field [0001] The invention relates to a high-precision and high-stability reflector adjustment device based on a flexible hinge, which belongs to the field of precision machinery and can be used in the adjustment link of space optical remote sensing cameras and ground precision instruments requiring high precision and high stability. Background technique [0002] In most cases, during the installation and adjustment process of space optical instruments on the ground, the mirror assembly is adjusted in place with the help of a general-purpose multi-dimensional adjustment platform or an industrial robot arm, and the reflection The mirror assembly is effectively fixed, and then the universal adjustment mechanism is removed. The advantage of this solution is that it is simple to implement, but the disadvantage is that there will be residual position deviation during the component fixing process. In addition, this method is a one-time adjustment, which cannot be correct...

AI Technical Summary

Problems solved by technology

The advantage of this solution is that it is simple to implement, but the disadvantage is that there will be residual position deviation during the component fixing process. In addition, this method is a one-time adjustment, which cannot be corrected on-orbit;

[0003] Some domestic research institutes use the Hexapod platform mechanism as the mirror adjustment mechanism. This mechanism has flexible adjustment degrees of freedom and high precision. In theory, it can realize the adjustment of the six degrees of freedom of the adjusted mirror. There is a strong coupling between them, the control process is complicated, the volume and weight of the mechanism are large, and the resistance to the mechanical environment is poor. At present, there is no practical application example in orbit.

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