System and method for controlling shape memory alloy actuators
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United States of America Patent
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Apr 8, 2003
Grant Date -
N/A
app pub date -
Jan 29, 2002
filing date -
Jan 29, 2002
priority date (Note) -
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Abstract
A system and method of controlling a shape memory alloy (SMA) actuator comprises supplying maximum control voltage to an SMA actuator where an object having a position to be controlled by the SMA actuator were to move toward a target position upon supply of non-zero control voltage, and the instantaneous actual position of the object is at a distance above a predetermined threshold from the target position. A variably controlled voltage is supplied to the SMA actuator between the maximum voltage and about zero voltage where the object to be controlled were to move toward the target position upon supply of the variably controlled voltage, and the instantaneous actual position of the object is at a distance below the predetermined threshold from the target position.
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