Spatial bistable thin-wall extension rod torsional rigidity testing device

Abstract

The invention relates to a spatial bistable thin-wall extension rod torsional rigidity testing device which comprises a horizontal platform, a guide rail, a clamp assembly, a static end module, a rotating end module, a load loading module, a torque measuring module and a torsional angle measuring module. The guide rail is positioned on the horizontal platform; the static end module is mounted at one end of the guide rail; the rotating end module is mounted in the middle of the guide rail; the load loading module is mounted at the other end of the guide rail; the torque measurement module is used for measuring the torque of the spatial bistable thin-wall extension rod, and the torsion angle measurement module is used for measuring the torsion angle of the spatial bistable thin-wall extension rod; and the bistable thin-wall extension rod is located between the static end module and the rotating end module and is fixed and clamped through a clamp. The method has the advantages of high loading control precision, small angle measurement error, adjustable measurement length and the like.

Description

technical field [0001] The invention belongs to the technical field of space expandable structures, and in particular relates to a space bistable thin-wall extension rod torsional rigidity testing device. Background technique [0002] With the rapid development of the aerospace industry and the continuous advancement of space technology, the applications of space deployable structures are increasing. Bistable thin-walled stretch rods are an important class of spatially expandable structural support elements, which can deform between two structural stable states through stored elastic strain energy or driven by mechanical transmission, so as to realize the folding and curling of spatial structures. or expand the function. [0003] Typical spatially bistable thin-walled extension rods include the tape tape spring strut Storable TubularExtendible Member, STEM, the double tape tape spring strut bi-STEM, the coilable tubular strut Collapsible Tubular Masts, CTM and herringbone s...

AI Technical Summary

Problems solved by technology

[0005] It should be pointed out that the above-mentioned test devices for the torsional stiffness of bistable thin-walled space extension rods mostly use gravity loading or manual loading, which has the problem of low loading control accuracy; the rotation angle measurement mostly uses a single torque sensor or digital image correlation. method, there is a problem of large angle measurement error

In addition, the above-mentioned devices have poor versatility and large changes when used for samples of different geometric sizes.

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