Folding and unfolding large-diameter optical mirror with high storage ratio

Abstract

The invention discloses a foldable and unfoldable large-diameter optical mirror with a high storage ratio, which includes a mirror body, the mirror body is formed by connecting multiple sub-lenses; the adjacent two sub-lenses are connected by a hinge mechanism ; The hinge mechanism includes a hinge mechanism a and a hinge structure b, wherein the hinge structure a includes an active fixed hinge and two floating hinges, and the hinge structure b includes three floating hinges. The active fixed hinge of the invention adopts an ultrasonic motor driving component as a power source, and has the characteristics of large driving torque and self-locking when power is off. The on-orbit deployment technology of the mirror body realizes the controllable and orderly deployment of the large-diameter mirror on the rail. Through the rational layout of fixed hinges and floating hinges, the mirror will not be stuck during the unfolding process, and the locking impact is small and the locking effect is achieved. High rigidity, light weight, high reliability and so on.

Description

technical field [0001] The invention relates to the technical field of spacecraft structures, in particular to a retractable and unfoldable large-diameter optical mirror with a high storage ratio. Background technique [0002] With the development of optical satellite technology, the mirror size of some large-aperture optical satellites is getting larger and larger, and the diameter of some mirrors has reached the order of 10m. After the track is expanded. [0003] In the existing folding and unfolding mirrors, most of the folding and unfolding mechanisms are passive deployment, which has high reliability, but also has the disadvantage of uncontrollable deployment process; in addition, there are some active deployment mechanisms, Electromagnetic motor is used as the driving source, but the motor itself has disadvantages such as low power density, heavy weight, and easy to generate electromagnetic interference. These problems limit the application of active deployment device...

AI Technical Summary

Problems solved by technology

[0003] In the existing folding and unfolding mirrors, most of the folding and unfolding mechanisms are passive deployment, which has high reliability, but also has the disadvantage of uncontrollable deployment process; in addition, there are some active deployment mechanisms, Electromagnetic motor is used as the driving source, but the motor itself has disadvantages such as low power density, heavy weight, and easy to generate electromagnetic interference. These problems limit the application of active deployment devices on satellites

[0004] At present, no technical description or report similar to the present invention has been found, and similar materials at home and abroad have not been collected yet.

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