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Investigations on Piezoactuator-Based Active Vibration Isolation for Tool-Based Micromachining Applications

Divijesh P., Vincent L D’Souza, Muralidhara ., Rathnamala R. Rao

Abstract


Stacked piezoactuators are suitable actuators for active vibration isolation systems due to their high stiffness and fast response. However, they exhibit hysteresis nonlinearity between applied voltage and the resulting displacement. In this paper, Bouc-Wen model is used to model the hysteresis nonlinearity of stacked piezoactuator. The model parameters are estimated from the experimental voltage-displacement data of a stacked piezoactuator using “Trust-region nonlinear least square method” in MATLAB Simulink. The resulting displacement for the given drive voltage is estimated and is compared with the experimental results. The voltage to be applied for the specific displacement of the piezoactuator is also estimated through simulation using inverse Bouc-Wen model equations. Tracking control experiments are performed for the stacked piezoactuator using the inverse Bouc-Wen model. A piezoactuator-based active vibration isolation system is developed and vibration isolation experiments have been carried out by incorporating model-based open loop displacement control for the piezoactuator.

 


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References


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DOI: https://doi.org/10.37591/joma.v2i1.7259

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