Modelling and gain scheduled control of shape memory alloy actuators

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Proceedings titleProceedings of 2005 IEEE Conference on Control Applications
ConferenceIEEE Conference on Control Applications, August 28th-31st 2005, Toronto Ontario
Pages767772; # of pages: 6
Subjectactuators; cooling; equations; heating; shape control; strain control; temperature distribution;
AbstractThis paper describes a gain-scheduled controller for a shape memory alloy (SMA) actuator. For accurate control of an SMA actuator, it is important to develop a precise model for the SMA. A model has been proposed based on concepts from physics. The equations include Joules heating - convectional cooling to explain the dynamics of temperature, Fermi-Dirac statistics to explain the variation of mole fraction with temperature, and a stress-strain constitutive equation to relate changes in mole fraction and temperature to changes in stress and strain of the SMA. This model is then used to develop a gain-scheduled controller to control the strain in the SMA. Simulation and experimental results show fast and accurate control of the strain in the SMA actuator.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NPARC number21272516
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Record identifier876e5e41-b4ea-4409-a2f2-0cbeb11e18d9
Record created2014-12-01
Record modified2016-05-09
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