Controllable deployment truss device with high storage ratio applied to spacecraft

Abstract

The invention provides a high-storage-ratio controllable truss spreading device for a spacecraft. The high-storage-ratio controllable truss spreading device includes a triangular-prism truss and a controllable spreading device; the triangular-prism truss comprises an upper triangular frame, upper support rods, hinges, lower support rods, a lower triangular frame, limit bolts and tensile bolts; thecontrollable spreading device comprises tensile arms, a trapezoidal lead screw, limit arms, a lead screw nut, a support frame, a guide rod and the like; the upper triangular frame is located on the upper support rods, the hinges are located between the upper support rods and the lower support rods, the lower triangular frame is located between the lower support rods and the limit bolts, the tensile bolts are located below the limit bolts, the lower triangular frame is located under the upper support rods, the upper triangular frame is located above the tensile bolts, and the tensile arms arelocated on the trapezoidal lead screw. According to the high-storage-ratio controllable truss spreading device for the spacecraft, by adopting the single lead screw and a television, controllable spreading of the triangular-prism truss is achieved; compared with a method using three lead screws, weight reduction of products is achieved, the reliability of a system is improved, and at the same time, the radical size of the system is reduced.

Description

technical field [0001] The invention relates to a spacecraft structure and mechanism, in particular to a high storage ratio controllable deployable truss device applied to a spacecraft. Background technique [0002] With the increasing number of space activities, deployable trusses, as a mechanism with a high storage ratio, are more and more widely used on spacecraft. The traditional triangular prism truss has the characteristics of high storage ratio, stable and compact structure, and high rigidity. In order to ensure the controllable expansion of the triangular prism truss on the rail, the controllable expansion device of the transmission uses three screw rods to stand on the top of the three edges of the folding truss, and uses three motors or one motor with a synchronous device to drive the three screw rods to rotate at the same speed. Pull the triangular frame to achieve linear motion, thereby controlling the sequential deployment of the truss. However, the unfolding ...

AI Technical Summary

Problems solved by technology

However, this unfolding device is installed on the top of the folding truss, which increases the height of the screw rod, and the height of the screw rod must be at least longer than the height of one section of the truss after unfolding, so that the actual storage ratio of the expandable truss is greatly reduced; secondly, the three screw rods It also increases the complexity of the whole device, increases the weight, and reduces the reliability

Images