Comportements des Micro-Actionneurs Antagonistes d'Alliage à Mémoire de Forme

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Authors
  1. Boissonnault, O.
  2. Wong, F.C.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN);Numerica Technologies Inc, Quebec City (QUE)
Abstract
Superior performance is a key goal in weapons design. Smart bombs and missiles and future guided weapons need to offer longer stand-off capability, higher velocity and accuracy and smaller occupied volume to ensure overwhelming dominance in any military conflict. To achieve far-term performance objectives, the research community in the United States has undertaken development of smart structure and active flow technologies to miniaturize the flight control devices now used in their weapons. The concept is based on the idea of controlling the flow structure around the body with small control actuation systems that are placed at critical locations in the flow. Shape memory alloys (SMA) offer the opportunity to create compact, solid-state actuation systems because of their ability to convert electrical energy into mechanical energy through Joule heating. The fabrication of a testbench for testing a set of SMA wires arranged as an antagonistic pair permitted validation of a SMA antagonistic actuator model. The model was composed of a iterative loop that searched for forces that gave an equilibrated displacement and a hybrid SMA constitutive model. A comparison of the numerical and experimental results confirmed that the model was able to predict reasonably well the observed behaviour.

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Report Number
DRDC-VALCARTIER-TM-2006-600 — Technical Memorandum
Date of publication
01 Jan 1968
Number of Pages
64
DSTKIM No
CA029802
CANDIS No
528167
Format(s):
CD ROM

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