Feedback control for shape memory alloy actuators
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United States of America Patent
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Apr 22, 2014
Grant Date -
Jan 6, 2011
app pub date -
Feb 20, 2009
filing date -
Feb 21, 2008
priority date (Note) -
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Abstract
Control feedback for regulating strain output of a shape memory alloy (SMA) actuator using a stress sensor for outputting an indication of a mechanical resistance applied against the SMA actuator, and a state sensor for outputting an indication of a state of actuation of the SMA actuator has been found to be surprisingly accurate. Advantageously feedback detection can be provided with sensors that have low power requirements and can be controlled with simple electronics.
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