An electro-mechanically coupled SDOF piezoelectric stack actuator model

Alexander York; Stefan Seelecke

doi:10.1117/12.776345

3 April 2008 An electro-mechanically coupled SDOF piezoelectric stack actuator model

Alexander York, Stefan Seelecke

Proceedings Volume 6926, Modeling, Signal Processing, and Control for Smart Structures 2008; 692608 (2008) https://doi.org/10.1117/12.776345
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

Abstract

Piezoelectric actuators used in nano-positioning devices exhibit highly non-linear behavior and strong hysteresis, which limits the efficiency of conventional non-model-based controllers. This paper presents the first results of a free energy model based on the theory of thermal activation for single crystal piezoceramics that couples mechanical stress and electric field. It is capable of predicting the hysteretic behavior along with the frequency-dependence present in these materials. The model is then coupled with a spring as a first step toward a SDOF model of a commercial nano-positioning stage and is the basis for future control applications. Quasi-static simulations are presented to illustrate the effects of spring loading on the actuator behavior.

Citation Download Citation

Alexander York and Stefan Seelecke "An electro-mechanically coupled SDOF piezoelectric stack actuator model", Proc. SPIE 6926, Modeling, Signal Processing, and Control for Smart Structures 2008, 692608 (3 April 2008); https://doi.org/10.1117/12.776345

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