Intelligent expansion type antenna reflecting surface radially supported by multi-stable curved beam

Abstract

The invention discloses an intelligent expansion type antenna reflecting surface radially supported by a multi-stable curved beam, and relates to a parabolic antenna. A plurality of supporting ribs are fixed on a side wall of a central drum in a surrounding manner; the outer ends of the supporting ribs are fixedly connected with the outer surface edge of a reflecting surface; a composite negativestiffness unit cell comprises a curved beam structure and three supporting structures, and two rigid blocks are symmetrically arranged at the two sides of the curved beam structure to change the sizeof the cross section. Every four composite negative stiffness unit cells are combined and fixed to form a composite negative stiffness honeycomb structure. A spring is fixed in the middle of the curved beam structures of every two opposite composite negative stiffness unit cells, and every eight composite negative stiffness honeycomb structures form a supporting rib single body. A plurality of supporting rib single bodies form supporting ribs, the supporting ribs can be bent and unfolded through temperature regulation and control, and the supporting ribs are provided with a plurality of nodesto be bonded and fixed to the reflecting surface. A shape memory function is achieved, multiple steady states can be achieved, the folding and unfolding are achieved through temperature regulation andcontrol, and the reliability is high.

Description

technical field [0001] The invention relates to a parabolic antenna, in particular to an intelligent unfolding antenna reflective surface radially supported by multi-stable curved beams. Background technique [0002] At present, in frontier fields such as satellite communication, earth observation, global positioning, and space exploration, human beings have an increasingly urgent demand for high-precision antennas. Keep it small. Large deployable antennas with high storage ratio, high reliability and high precision are a bottleneck technology in the aerospace field worldwide. The satellite antenna with the existing mechanical structure has large volume, heavy weight, low unfolding and folding efficiency, and low reliability due to the complexity of the driving mechanism in the unfolding and folding process. [0003] The multi-stable structure is a new type of lightweight multi-functional structure that has attracted widespread attention at home and abroad in recent years....

AI Technical Summary

Problems solved by technology

[0008] Compared with the prior art, the beneficial effect of the present invention is that: the support rib formed by the composite negative stiffness unit cell of the present invention has a shape memory function, and can realize multiple stable states. The temperature control of the curved beam structure can realize the intelligent folding and unfolding of the reflective surface, and the self-locking can be carried out without changing the temperature. No auxiliary facilities are needed, and no hinge connection is required at the corner, and it can be controlled at any angle. The problems of large launch volume, heavy weight, low unfolding and folding efficiency, and low reliability are of great significance

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