Optimal excitation of a cylindrical shell by piezoelectric actuators

Zhang, Lei; Yang, Yue

doi:10.1117/12.713322

SPIE Proceedings

2007

DOI: 10.1117/12.713322

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Optimal excitation of a cylindrical shell by piezoelectric actuators

Lei Zhang

Yue Yang

Abstract: In this paper, a simply supported thin cylindrical shell segment excited by a pair of collocated PZT actuators is studied. A closed-form solution has been obtained to describe the radial vibration of the shell. Based on this solution, optimal placement of the pair of PZT actuators in terms of maximizing the vibration of shell is discussed and numerically verified. It is found that the pattern of the optimal locations of the PZT actuators can be represented by a simple function, namely, the position mode functi… Show more

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Actuation characteristics and applications of piezoelectric materials and ionic polymer-metal composites

Zhang¹

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Smart materials are a special class of materials which have abilities to change their physical properties in response to environmental stimuli. One of the important groups of smart materials is electro-active material (EAM) which responds to external electric potentials. Based on the working mechanism, the EAM can be further divided into two groups, i.e., electronic EAMs which rely on internal electrostatic forces for their actuation and ionic EAMs which depend on ion transportation and interaction for their actuation. Piezoelectric material and ionic polymer-metal composite (IPMC) are typical electronic EAM and ionic EAM, respectively. Piezoelectric materials, when subject to a mechanical force, will become electrically polarized. Tension and compression generate voltages of opposite polarity, and in proportion to the applied force. Conversely, when piezoelectric materials are subject to an electric field parallel to the polarization direction, they will expand or contract according to the polarity of the field, and in proportion to the strength of the field. The two effects are labeled as direct and converse piezoelectric effect and they are the basis for piezoelectric materials as sensors and actuators. Similar to piezoelectric materials, the IPMCs can also respond to electric and mechanical excitations. Instead of extension and contraction as piezoelectric materials, the IPMCs undergo transverse bending motion under an applied electric potential on the electrodes. On the other hand, the IPMCs can generate a measurable electric potential when it is subject to an imposed deformation. Thus, the IPMCs can also serve as sensors and actuators. The two types of smart materials, each has its own characteristics, can be employed for different applications in biomedical engineering. The objective of this research is to study the actuation characteristics of piezoelectric materials and IPMCs and explore the possibility of using the two types of materials for biomedical applications.

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Actuation characteristics and applications of piezoelectric materials and ionic polymer-metal composites

Zhang¹

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Optimal excitation of a cylindrical shell by piezoelectric actuators

Cited by 1 publication

References 8 publications

Actuation characteristics and applications of piezoelectric materials and ionic polymer-metal composites

Actuation characteristics and applications of piezoelectric materials and ionic polymer-metal composites

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