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Shape Adjustment and Experimental Study of a Shape Memory Cable (SMC) Structure.

Fengqun Pan1, Xiangjun Jiang1, Jingli Du1

  • 1Key Laboratory of Electronic Equipment Structure Design, Xidian University, Xi'an 710071, China.

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|May 13, 2023
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Summary
This summary is machine-generated.

Shape memory cables (SMCs) improve the surface accuracy of large deployable antennas. This study demonstrates SMCs effectively adjust thermal deformation in space environments, enhancing antenna performance and reliability.

Keywords:
experimental studyshape adjustmentshape memory cable net structuresurface accuracythermal deformation

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Area of Science:

  • Space engineering
  • Materials science
  • Mechanical engineering

Background:

  • Large deployable cable net antennas are crucial for space applications due to their structural efficiency.
  • Harsh space environments cause thermal deformation and stress relaxation, degrading antenna performance.
  • Existing cable net structures face challenges in maintaining surface accuracy.

Purpose of the Study:

  • To investigate the use of shape memory cables (SMCs) to mitigate thermal deformation in cable net structures.
  • To enhance the surface accuracy of deployable antennas using SMCs' phase transition properties.
  • To validate the effectiveness of SMCs in improving antenna performance under varying temperatures.

Main Methods:

  • A 2.2 m diameter shape memory cable net structure model was constructed.
  • Experiments were conducted at normal, high, and low temperatures to simulate space conditions.
  • Surface accuracy adjustments were evaluated under thermal cycling.

Main Results:

  • Shape memory alloy wire demonstrated stable surface accuracy adjustment capabilities at room temperature.
  • The SMC net structure exhibited minimal thermal deformation and good surface accuracy during temperature cycling.
  • Surface accuracy improved by 44.4% at high temperatures and 45.2% at low temperatures compared to ordinary structures.

Conclusions:

  • The proposed method effectively utilizes SMCs to adjust and improve the surface accuracy of cable net structures.
  • SMCs offer a viable solution for enhancing the performance and reliability of deployable antennas in space.
  • Experimental findings provide significant guidance for future engineering applications of SMCs in space technology.