Theoretical performance of a coiled coil piezoelectric bimorph |
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Affiliation: | Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom;School of Electrical and Electronic Engineering, Nanyang Technology university, Singapore 639798, Singapore |
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Abstract: | The electromechanical coupling behaviour of a novel, highly coiled piezoelectric strip structure is developed in full, in order to expound its performance and efficiency. The strip is doubly coiled for compactness and, compared to a standard straight actuator of the same cross-section, it is shown that the actuator here offers better generative forces and energy conversion, and substantial actuated displacements, however, at the expense of a much lower stiffness. The device is therefore proposed for high-displacement, quasi-static applications. |
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