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A SMA-based redundant actuation locking device for rotary feed structure using self-locking principle

  • Beihang University
  • Collaborative Innovation Center of Advanced Aero-Engine
  • National Key Laboratory of Science and Technology on Aero Engines Aero-Thermodynamics
  • Beijing Research Institute of Telemetry

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a locking device which achieves in locking the rotary feed structure of a space-borne microwave radiometer during the launch stage. This locking device employs two shape memory alloy (SMA) wires as the actuating elements, and uses a self-locking structure to achieve the locking function. To improve the performance and reliability, a redundant SMA wire and a step structure are employed. To validate the proposed SMA locking device, four prototypes were fabricated and tested. The result shows that the locking device possesses the advantages of remarkable locking performances, wide operation electric current and high survival temperature. Based on the test results, the locking device has a great potential for the application of space rotary structures.

Original languageEnglish
Title of host publicationSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016
EditorsJerome P. Lynch
PublisherSPIE
ISBN (Electronic)9781510600447
DOIs
StatePublished - 2016
EventSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016 - Las Vegas, United States
Duration: 21 Mar 201624 Mar 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9803
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016
Country/TerritoryUnited States
CityLas Vegas
Period21/03/1624/03/16

Keywords

  • Actuator
  • Feed structure
  • Locking device
  • Self-locking
  • Shape memory alloy

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