Title:
Large Effective-Strain Piezoelectric Actuators Using Nested Cellular Architecture with Exponential Strain Amplification Mechanisms

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dc.contributor.author Ueda, Jun en_US
dc.contributor.author Secord, Thomas en_US
dc.contributor.author Asada, H. Harry en_US
dc.contributor.corporatename Georgia Institute of Technology. School of Mechanical Engineering en_US
dc.contributor.corporatename Massachusetts Institute of Technology. Dept. of Mechanical Engineering en_US
dc.contributor.corporatename Georgia Institute of Technology. Center for Robotics and Intelligent Machines en_US
dc.date.accessioned 2011-03-15T18:46:36Z
dc.date.available 2011-03-15T18:46:36Z
dc.date.issued 2010-10
dc.description ©2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. en_US
dc.description DOI: 10.1109/TMECH.2009.2034973 en_US
dc.description.abstract Design and analysis of piezoelectric actuators having over 20% effective strain using an exponential strain amplification mechanism are presented in this paper. Piezoelectric ceramic material, such as lead zirconate titanate (PZT), has large stress and bandwidth, but its extremely small strain, i.e., only 0.1%, has been a major bottleneck for broad applications. This paper presents a new strain amplification design, called a “nested rhombus” multilayer mechanism, that increases strain exponentially through its hierarchical cellular structure. This allows for over 20% effective strain. In order to design the whole actuator structure, not only the compliance of piezoelectric material but also the compliance of the amplification structures needs to be taken into account. This paper addresses how the output force and displacement are attenuated by the compliance involved in the strain amplification mechanism through kinematic and static analysis. An insightful lumped parameter model is proposed to quantify the performance degradation and facilitate design tradeoffs. A prototype-nested PZT cellular actuator that weighs only 15 g has produced 21% effective strain (2.5 mm displacement from 12-mm actuator length and 30 mm width) and 1.7 N blocking force. en_US
dc.identifier.citation Ueda, J.; Secord, T.W.; Asada, H.H., "Large Effective-Strain Piezoelectric Actuators Using Nested Cellular Architecture with Exponential Strain Amplification Mechanisms," IEEE/ASME Transactions on Mechatronics, Vol. 15, no. 5 (Oct. 2010) 770-782. en_US
dc.identifier.issn 1083-4435
dc.identifier.uri http://hdl.handle.net/1853/37408
dc.language.iso en_US en_US
dc.publisher Georgia Institute of Technology en_US
dc.publisher.original Institute of Electrical and Electronics Engineers en_US
dc.subject Amplification en_US
dc.subject Piezoelectric actuators en_US
dc.title Large Effective-Strain Piezoelectric Actuators Using Nested Cellular Architecture with Exponential Strain Amplification Mechanisms en_US
dc.type Text
dc.type.genre Post-print
dspace.entity.type Publication
local.contributor.author Ueda, Jun
local.contributor.corporatename Institute for Robotics and Intelligent Machines (IRIM)
local.contributor.corporatename Biorobotics and Human Modeling Lab
relation.isAuthorOfPublication 7ff601c5-b262-4830-8a06-b75c55f5f1c8
relation.isOrgUnitOfPublication 66259949-abfd-45c2-9dcc-5a6f2c013bcf
relation.isOrgUnitOfPublication 4b66d00b-b98a-41d9-8840-90db5ad3f880
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