NDLI: Unimorph PZT Cymbal Design in Energy Harvesting

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Mo, Changki Arnold, Daniel William, C. Kinsel William, W. Clark
Copyright Year	2011
Abstract	This paper presents power generation performance of unimorph PZT (lead zirconate titanate) cymbal harvesters optimally designed for the power requirements of a specific application. Proof-of-concept work has shown that the traditional cymbal design can be adapted to a new design that is capable of sustaining higher mechanical loads by replacing the piezoelectric plate with a unimorph circular piezoelectric diaphragm between the metal end caps. The unimorph circular diaphragm is constructed by bonding PZT to a steel substrate to provide increased strength. Additional work was performed to prepare the new cymbal design for large-scale implementation in a variety of applications. The parameters that affect energy harvesting performance for the cymbal structure are first optimized by parametric studies to produce optimum generated energy from a specific range of applied cyclic forces. Key parameters in the unimorph PZT cymbal design include the material properties and the dimensions of the end caps, the ratios of the diameters of the unimorph disc and the end cap cavity, and thickness ratio of the PZT layer and the substrate. Based on the optimized unimorph PZT cymbal structure, a specimen was then fabricated and tested on the load-frame to validate analytically predicted energy generating performance. The specimen was tested under a 1 Hz cyclic load of up to 2,100 N. The measured open circuit output voltages for two different load inputs were in accordance with the analytical prediction.
Sponsorship	Aerospace Division
Starting Page	139
Ending Page	144
Page Count	6
File Format	PDF
ISBN	9780791854723
DOI	10.1115/SMASIS2011-5005
Volume Number	ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2
Conference Proceedings	ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
Language	English
Publisher Date	2011-09-18
Publisher Place	Scottsdale, Arizona, USA
Access Restriction	Subscribed
Subject Keyword	Circuits Diaphragms (structural) Metals Dimensions Energy harvesting Steel Stress Design Cavities Diaphragms (mechanical devices) Materials properties Energy generation Disks Bonding
Content Type	Text
Resource Type	Article

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