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→Shape Memory Alloy (SMA)
=== Shape Memory Alloy (SMA) ===
[[File:SMA1LinearActuator2.jpggif|thumb|Conceptual design of a basic traveling-nut linear actuator. Note that in this example the lead screw (gray) rotates while the lead nut (yellow) and tube (red) do not. Attribution: Public Domain, https://en.wikipedia.org/w/index.php?curid=12285672]]
A SMA is an alloy that “remembers” its original shape when it was formed and returns to it from its deformed state when heated. There are multiple actuators already in use as well as several under development that exploit use of SMAs for release of the deployable. <br \>
Some of the mechanisms that use SMAs are listed: