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Open AccessArticle

Active Adjustment of Surface Accuracy for a Large Cable-Net Structure by Shape Memory Alloy

1
Key Laboratory of Electronic Equipment Structural Design, Xidian University, Xi’an 710071, China
2
Xi’an Institute of Space Radio Technology, Xi’an 710100, China
3
State Key Laboratory for Manufacturing System, Xi’an Jiaotong University, Xi’an 710049, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(16), 2619; https://doi.org/10.3390/ma12162619
Received: 12 July 2019 / Revised: 9 August 2019 / Accepted: 13 August 2019 / Published: 16 August 2019
(This article belongs to the Special Issue Shape Memory Alloys (SMAs) for Engineering Applications)
The high surface accuracy design of a cable-net antenna structure under the disturbance of the extremely harsh space environment requires the antenna to have good in-orbit adjustment ability for surface accuracy. A shape memory cable-net (SMC) structure is proposed in this paper and believed to be able to improve the in-orbit surface accuracy of the cable-net antenna. Firstly, the incremental stiffness equation of a one-dimensional bar element of the shape memory alloy (SMA) to express the relationship between the force, temperature and deformation was effectively constructed. Secondly, the finite element model of the SMC antenna structure incorporated the incremental stiffness equation of a SMA was established. Thirdly, a shape active adjustment procedure of surface accuracy based on the optimization method was presented. Finally, a numerical example of the shape memory cable net structure applied to the parabolic reflectors of space antennas was analyzed. View Full-Text
Keywords: shape memory alloy; cable-net antenna structure; finite element modeling; active adjustment of surface accuracy shape memory alloy; cable-net antenna structure; finite element modeling; active adjustment of surface accuracy
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MDPI and ACS Style

Jiang, X.; Pan, F.; Fan, Y.; Du, J.; Zhu, M.; Chen, Z. Active Adjustment of Surface Accuracy for a Large Cable-Net Structure by Shape Memory Alloy. Materials 2019, 12, 2619.

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