Design and Experiment of Triangular Prism Mast with Tape-Spring Hyperelastic Hinges

Because of the limited space of the launch rockets, deployable mechanisms are always used to solve the phenomenon. One dimensional deployable mast can deploy and support antenna, solar sail and space optical camera. Tape-spring hyperelastic hinges can be folded and extended into a rod like configuration. It utilizes the strain energy to realize self-deploying and drive the other structures. One kind of triangular prism mast with tape-spring hyperelastic hinges is proposed and developed. Stretching and compression stiffness theoretical model are established with considering the tape-spring hyperelastic hinges based on static theory. The finite element model of ten-module triangular prism mast is set up by ABAQUS with the tape-spring hyperelastic hinge and parameter study is performed to investigate the influence of thickness, section angle and radius. Two-module TPM is processed and tested the compression stiffness by the laser displacement sensor, deploying repeat accuracy by the high speed camera, modal shape and fundamental frequency at cantilever position by LMS multi-channel vibration test and analysis system, which are used to verify precision of the theoretical and finite element models of ten-module triangular prism mast with the tape-spring hyperelastic hinges. This research proposes an innovative one dimensional triangular prism with tape-spring hyperelastic hinge which has great application value to the space deployable mechanisms.

三棱柱伸展臂超弹性铰链的力学建模与分析

针对对向多层超弹性铰链展开状态的稳定性问题,分别基于铁木辛柯屈曲理论和欧拉梁屈曲理论建立对向多层超弹性铰链折叠峰值力矩模型。搭建实验平台,分别对12种规格对向单层、双层超弹性铰链进行实验研究,发现理论值与实验值偏差不大于7.73%,偏差均值不大于4.93%,偏差标准差不大于4.97%,验证了基于欧拉梁屈曲理论建模的准确性。对对向多层超弹性铰链进行参数研究,发现半径、中心角、厚度和层数与屈曲力矩正相关,而长度则是负相关的。