Repeatable unfolding and folding mechanism, double-folding umbrella antenna and control method

Abstract

The invention belongs to the technical field of satellite-borne antennas, and discloses a repeatable unfolding and folding mechanism, a double-folding umbrella antenna and a control method, and the mechanism comprises a padlock ring, a central ring tooth and a rotary bearing stand; the padlock ring, the central ring tooth and the rotary bearing stand are sequentially clamped between the central fixed surface and the central bottom plate from top to bottom, the outer side of the central ring tooth is meshed with a motor gear, and the motor gear is connected with a motor shaft of the lower motor; a root rib fixing plate is fixed to the outer side of the center bottom plate, and a root rib rotary table, a pulley rope clamping block, a wire guide ring and a volute spiral spring are installed at the upper end of the root rib fixing plate. An inhaul cable is arranged among the padlock ring, the wire guide ring and the pulley rope clamping block in a penetrating manner; and the other end of the inhaul cable is hinged with the root rib and the tip rib. The umbrella antenna is controllably unfolded and folded through the motor, large impact force generated when the torsional spring is unfolded is avoided, and repeated unfolding and folding can be conducted. A tedious pull rod mechanism is not needed, the installation steps are reduced, the reliability is improved, and the antenna can be applied to a large-caliber umbrella-shaped antenna.

Description

technical field [0001] The invention belongs to the technical field of space-borne antennas, and in particular relates to a repeatable retractable mechanism, a double-folding umbrella antenna and a control method. Background technique [0002] At present, the umbrella-shaped deployable antenna has high precision, strong rigidity, and small surface deformation. A double-folding umbrella antenna unfolding mechanism that can be unfolded and retracted repeatedly can better unfold and retract the umbrella-shaped antenna, and has better positioning ability. [0003] At present, the research on the umbrella antenna mainly focuses on the single-fold and multi-fold deployment, and there is a lack of research on the retraction of the antenna. Overcoming the retraction problem of the umbrella antenna can reduce the cost, can be used repeatedly in the non-cosmic environment, and save the time of non-working time. Occupies space, and double folding further saves the occupied space whe...

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Problems solved by technology

[0004]Through the above analysis, the existing problems and defects of the prior art are: in the prior a

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