A Novel Experimental Arrangement for Determining the True Operational Range of Piezoelectric
J. Koruza, D. Franzbach, K.G. Webber
Technische Universität Darmstadt, Darmstadt, Germany
A new experimental arrangement for the determination of piezoactuator´s blocking force and operational range is presented. The sample is mounted into a load frame and driven by an electric field, while the linear or nonlinear external load is simulated by a computer-controlled stack actuator. This enables the determination of the blocking force by the proportional loading method, whereby the electrical and mechanical forces are applied simultaneously. The measurement setup was tested on soft-type PZT piezoceramics and the results are compared to other characterization methods. The comparison revealed large discrepancies between the methods, originating from the different order of the application of electrical and mechanical fields and the inherent nonlinearity of ferroelectric materials. This discrepancy results in decreased actuator performance, demonstrating the need for accurate determination of the actuator´s operational range.
ACTUATOR 2014 Manuskript Poster 52
Publication date: 26/05/2015
Manuscript Poster 52 published in Conference Proceedings ACTUATOR 2014
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