Călin RUSU, Sorin BESOIU


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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