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14 February 1997 Comparative analysis of piezoelectric bending-mode actuators
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During the last several years novel piezoelectric bending actuators have been developed: RAINBOW, CERAMBOW, CRESCENT, d33 bimorph and THUNDER. A comparative experimental investigation of electromechanical characteristics of these devices along with conventional d31 bimorph and unimorph actuators was conducted in this work. All transducers were fabricated from soft piezoelectric ceramics. The experimental results show the d33 bimorph and unimorph elements have superior quasistatic characteristics as compared to other type of bending-mode actuators. All these piezoelectric devices demonstrate a significant dependence of electromechanical performance on the magnitude of the driving electric field. It was found that the decrease in the mechanical quality factor and resonant frequency of bending vibrations in d31 unimorph, RAINBOW, CRESCENT (CERAMBOW) and THUNDER with increasing electric field is much smaller than that in bimorph and d33 unimorph actuators. The dependence of the behavior of these devices on the operating conditions governs the selection of a particular device for a specific application.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Valery D. Kugel, Sanjay Chandran, and Leslie Eric Cross "Comparative analysis of piezoelectric bending-mode actuators", Proc. SPIE 3040, Smart Structures and Materials 1997: Smart Materials Technologies, (14 February 1997);

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