2 April 2015 Multiobjective optimization of piezoelectric bimorph actuator with rigid extension
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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 stillness, 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.
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Nilanjan Chattaraj, Nilanjan Chattaraj, Ranjan Ganguli, Ranjan Ganguli, } "Multiobjective optimization of piezoelectric bimorph actuator with rigid extension", Proc. SPIE 9431, Active and Passive Smart Structures and Integrated Systems 2015, 94311V (2 April 2015); doi: 10.1117/12.2084027; https://doi.org/10.1117/12.2084027
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