Influence of the actuation waveform on the performance of piezoelectric stick-slip actuators

Conference: IKMT 2015 - 10. ETG/GMM-Fachtagung Innovative Klein- und Mikroantriebstechnik
09/14/2015 - 09/15/2015 at Köln, Deutschland

Proceedings: ETG-Fb. 146: IKMT 2015

Pages: 5Language: englishTyp: PDF

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Authors:
Pfeffer, D.; Schlaak, H. F.; Pott, P. P. (Technische Universität Darmstadt, Institute of Electromechanical Design, Darmstadt, Germany)
Scholz, C.; Wäsche, R. (BAM, Federal Institute for Materials Research and Testing, Div. 6.3, Berlin, Germany)
Belly, C. (Cedrat Technologies S.A., Meylan, France)

Abstract:
Performance and efficiency of piezo-electric stick-slip actuators are dependent on the waveform of the electrical actuation of the piezo-stack. This paper compares between a conventional saw-tooth actuation with two waveforms that feature softer acceleration in order to minimize the duration of the slip-phase. It is shown that the proposed waveforms increase both maximum mechanical output power (by 43%) and overall efficiency (by 25%) of the examined actuator.