Model Development for PZT Bimorph Actuation Employed for Micro-Air Vehicles

Author:

Crews John1,Bravo Nikolas2,Smith Ralph2

Affiliation:

1. Applied Research Associates, Raleigh, NC

2. North Carolina State University, Raleigh, NC

Abstract

In the paper, we discuss the development of a model for PZT bimorph actuators used to power micro-air vehicles including Robobee. Due to highly dynamic drive regimes required for the actuators, models must quantify the nonlinear, hysteretic, and rate-dependent behavior inherent to PZT in these regimes. We employ the homogenized energy model (HEM) framework to model the actuator dynamics and numerically we illustrate the capability of the model to characterize the inherent hysteresis. This provides a comprehensive model, which can be inverted and implemented for certain control regimes.

Publisher

American Society of Mechanical Engineers

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