Space deployment mechanism and deployment method based on shape memory polymer composites

Abstract

The invention provides a space unfolding mechanism and unfolding method based on a shape memory polymer composite material. The unfolding mechanism comprises an alloy base, a 45-degree hinge and a rodpiece system. The rod piece system comprises a plurality of 180-degree hinges and a plurality of composite material hollow rod pieces; every two adjacent composite material hollow rod pieces are connected through a 180-degree hinge. A plurality of composite material hollow rod pieces of the space unfolding mechanism in the folded state are arranged in parallel from bottom to top; each of the 45-degree hinge and the 180-degree hinges comprises an alloy adapter and a sheet layer made of a shape memory polymer composite material, and the two ends of each sheet layer made of the shape memory polymer composite material are connected with the structures at the corresponding positions through alloy adapters respectively. According to the invention, the current situation that the practical application of the shape memory polymer composite material in a large deployable structure is less is changed, and the on-orbit task of the load can be realized.

Description

technical field [0001] The invention belongs to the technical field of space deployment, and in particular relates to a space deployment mechanism and a deployment method based on a shape memory polymer composite material. Background technique [0002] Shape memory polymer (Shape Memory Polymer, SMP) is a kind of polymer material that can sense external stimuli, respond actively, and has shape memory effect. It has the ability of self-sensing, self-diagnosis, and self-driving. . The composite material prepared by shape memory polymer and carbon fiber has the characteristics of high strain failure rate, high unit modulus and low density, and is an ideal material for the field of space expansion. Compared with traditional space-expanding materials, shape-memory polymer composites have more excellent mechanical properties and designability, and can return to the original state only by thermal excitation, which is a repeatable deformation and recovery cycle system. [0003] In...

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Problems solved by technology

[0005] 1. The application of shape memory polymer composite materials in the aerospace field is still in the stage of theoretical and experimental verification. Some smart space deployable structure concepts proposed abroad mainly use the small strain and large angle bending characteristics of composite materials to achieve larger structures. Expansion\compression ratio, while there is no domestic precedent for the practical application of shape memory polymer composites in large-scale expandable structures

[0006] 2. Although the traditional space deployment structure can achieve the effect of deployment, its structure is complex, the reliability is low, the cost is high, and it is easy to cause a large vibration response of the spacecraft during the deployment process

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