ANALYSIS OF THE DISPLACEMENT AMPLIFICATION RATIO FOR A PIEZOELECTRIC DRIVEN COMPLIANT MECHANISM

Călin RUSU, Sorin BESOIU

Abstract


Piezoelectric elements are widely used in many precision systems and devices. Although they have many advantages, piezo elements offer limited displacements and have hysteresis nonlinearity.  When a larger displacement is needed, a very common approach is to combine a piezoelectric element with a mechanical displacement amplifier usually based on a compliant mechanism. An important feature of these mechanisms is the displacement amplification ratio. In the paper the amplification ratio of a compliant mechanism driven by a piezoelectric stack, was determined using theoretical and experimental methods.

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References


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