Novel rib unfolding mechanism of high precision umbrella type antenna

Abstract

Provided is a novel rib unfolding mechanism of high precision umbrella type antenna; a motor and a speed reducer provide power for the rib unfolding mechanism; a lead screw is connected with the speed reducer via a shaft coupling block; the lead screw rotates under the drive of the speed reducer; a nut is sleeve on the lead screw in order to transform the rotation movement of the lead screw into the up and down linear movement of the nut; a sliding disk is sleeve on a guiding sleeve; the sliding disk is connected with the nut by a limit screw; and the sliding disk moves up and down along with the nut; one end of a connecting rod is hinged with the sliding disk through a spindle; the other end is hinged with a locking arm; umbrella type antenna ribs are installed on a H surface of the locking arm; the connecting rod drives the locking arm to rotate; the rotation of the locking arm drives the antenna ribs to finish unfolding and folding actions; an in-position locking device is used for locking after the antenna ribs are unfolded in position, thus giving the antenna ribs enough rigidity; the novel rib unfolding mechanism of high precision umbrella type antenna achieves smooth unfolding and folding of the high precise umbrella type antenna; and the process is controllable; the novel rib unfolding mechanism of high precision umbrella type antenna has advantages of high in repeatedly unfolding precision and small in thermal deformation.

Description

Technical field [0001] The invention relates to a novel rib deployment mechanism for a high-precision umbrella antenna, which is used for realizing the deployment and folding of the high-precision umbrella antenna, and belongs to the technical field of satellite antenna mechanisms. Background technique [0002] The invention is derived from the development of a high-precision radial rib umbrella-shaped expandable antenna. In order to meet the envelope requirements of satellite launching, the large-aperture antenna should have the characteristic of high storage ratio. The antenna is locked and stored on the satellite platform during satellite launching. , And then expand into working state after the rail, such as figure 1 As shown, this requires the antenna product to be able to realize the functions of folding and unfolding in addition to the established task functions. [0003] Such as figure 2 As shown, the radial rib umbrella-shaped deployable antenna is mainly composed of a ri...

AI Technical Summary

Problems solved by technology

[0010] According to the latest information, there are currently two specific structural forms for the deployment of high-precision umbrella-shaped deployable antennas: one is the umbrella-shaped deployable antenna developed by Russia and applied to the relay satellite "Ray 5". The deployment is driven by steel wire pulling, that is, each rib is pulled and unfolded by a steel wire. Since the steel wire can only transmit pulling force but not thrust, the antenna cannot stop after the unfolding process begins, let alone achieve reverse folding through the unfolding mechanism. , and when the antenna mouth faces forward, the lower half of the ribs will instantly unfold under the action of gravity, but the upper half of the ribs is still in a retracted state, so it is impossible to carry out the test of the mouth facing forward; The umbrella-shaped deployable antenna on the satellite TDRS is driven by a lead screw. Since the lead screw has a self-locking effect, the antenna can be deployed with the mouth facing forward. If there is an abnormality in the orbit deployment process, the deployment can be stopped or Reversely folded, but no relevant literature reports have been found on the function, performance requirements and specific structure of the rib unfolding mechanism

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