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Multiobjective Optimization of Piezoelectric Bimorph Actuator with Rigid Extension

Chattaraj, Nilanjan and Ganguli, Ranjan (2015) Multiobjective Optimization of Piezoelectric Bimorph Actuator with Rigid Extension. In: Conference on Active and Passive Smart Structures and Integrated Systems, MAR 09-12, 2015, San Diego, CA.

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Official URL: http://dx.doi.org/10.1117/12.2084027

Abstract

Production of high tip deflection in a piezoelectric bimorph laminar actuator by applying high voltage is limited by many physical constraints. Therefore, piezoelectric bimorph actuator with a rigid extension of non-piezoelectric material at its tip is used to increase the tip deflection of such an actuator. Research on this type of piezoelectric bending actuator is either limited to first order constitutive relations, which do not include non-linear behavior of piezoelectric element at high electric field, or limited to curve fitting techniques. Therefore, this paper considers high electric field, and analytically models tapered piezoelectric bimorph actuator with a rigid extension of non-piezoelectric material at its tip. The stiffness, capacitance, effective tip deflection, block force, output strain energy, output energy density, input electrical energy and energy efficiency of the actuator are calculated analytically. The paper also discusses the multi-objective optimization of this type of actuator subjected to the mechanical and electrical constraints.

Item Type: Conference Proceedings
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Additional Information: Copy right for this article belongs to the SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
Keywords: Piezoelectric bimorph; Rigid extension; High electric field; Multiobjective optimization; Smart actuator; Laminar actuator
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 11 Aug 2015 09:12
Last Modified: 11 Aug 2015 09:12
URI: http://eprints.iisc.ernet.in/id/eprint/52083

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