Umbrella antenna unfolding synchronization device

Abstract

The invention relates to an umbrella antenna unfolding synchronization device and belongs to the space mechanism control technical field. The device includes a base, a rib group and a tension rope group; the base is of a horizontally-placed hollow ring structure; the rib group is fixedly mounted on the upper surface of the base; ribs in the rib group are connected with one another through the tension rope group; when an umbrella antenna is folded, the top ends of the rib group are inwardly contracted to the axis of the base; when the umbrella antenna is unfolded, the top ends of the rib groupare unfolded outwardly to form a petal-shaped structure; the rib group includes n ribs, wherein the n ribs are evenly distributed on the upper surface of the base, n is a positive integer, and n satisfies a relational expression that 20<=n<=28; each rib is of an arc-shaped structure, and the height of the rib ranges from 4700 to 4760 mm; and the spacing of the center points of two adjacent ribs ranges from 280 to 290 mm. With the device of the invention adopted, the problem of the twisting of a main mesh surface and an auxiliary mesh surface caused by the difference of the rotation angles of the ribs during the unfolding process of the antenna can be solved, and the stability of the unfolding of the antenna and the surface precision of the antenna during in-place unfolding are improved.

Description

technical field [0001] The invention relates to the technical field of space mechanism control, in particular to an umbrella antenna deployment synchronization device. Background technique [0002] At present, the existing driving methods of umbrella antennas at home and abroad are mainly spring deployment and connecting rod deployment schemes. The spring deployment scheme is a single rib that expands independently. This structural scheme is simple, but the deployment torque is small; the linkage deployment scheme is a mature The scheme, but the expansion mechanism is too large in size and heavy in weight. A brand-new deployment mechanism is designed according to the folding and deployment requirements of the large-diameter umbrella antenna. The deployment mechanism is a rope deployment, and the rope deployment mechanism is light in weight and poor in synchronization. The ribs that are closer to the motor have a relatively large deployment driving force, and the ribs that a...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide an umbrella-shaped antenna deployment synchronization device, which effectively solves the problem that the main and secondary mesh surfaces are pulled due to the unequal rotation angle of each rib during the antenna deployment process, and improves the antenna. The stability of deployment and the shape accuracy of antenna deployment in place

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