Method of controlling a shape memory alloy actuator utilizing resistance change

A method of controlling a shape memory alloy actuator utilizing the change in resistance exhibited by the actuator over an actuation cycle, or a derivative thereof, to identify at least one event, such as, for example, a peak, valley, change in slope without reaching a valley, or a jump in resistanc...

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Main Authors JOHNSON NANCY L, MANKAME NILESH D, MCKNIGHT GEOFFREY P, GAO XIUJIE, HERRERA GUILLERMO A, PINTO NICHOLAS WILLIAM, BROWNE ALAN L
Format Patent
LanguageEnglish
Published 29.05.2012
Subjects
BLASTING
HEATING
LIGHTING
MACHINES OR ENGINES FOR LIQUIDS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
MECHANICAL ENGINEERING
MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOTOTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISEPROVIDED FOR
OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
PHYSICS
PRODUCING MECHANICAL POWER
SPRING, WEIGHT, INERTIA OR LIKE MOTORS
TESTING
WEAPONS
WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Summary:A method of controlling a shape memory alloy actuator utilizing the change in resistance exhibited by the actuator over an actuation cycle, or a derivative thereof, to identify at least one event, such as, for example, a peak, valley, change in slope without reaching a valley, or a jump in resistance within the signal plot that corresponds to the start of actuation, end of actuation, an overload case, and the introduction of a resistive element respectively, and generating a response based upon the event.
Bibliography:Application Number: US20090437722