Thermomechanical actuators (TMAs) are considered to be an attractive choice for precision applications due to their high stiffness and force output in comparison to their electro-static counterparts as well as the capability to reach nanometer-level resolution with ranges of over several micrometers [1]. There have been prior attempts to achieve both expansion and contraction mechanisms for chevron-beam based TMA's [2]. However, they generally required separate designs where the location of constraint beams had to be altered for each mode.
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