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Design optimization of PZT-based piezoelectric cantilever beam by using computational experiments

Title
Design optimization of PZT-based piezoelectric cantilever beam by using computational experiments
Author
이태희
Keywords
Optimization; piezoelectric device; model calibration; surrogate modeling
Issue Date
2015-10
Publisher
SPRINGER
Citation
Journal of Electronic Materials August 2016, Volume 45, Issue 8, pp 3848–3858
Abstract
Piezoelectric energy harvesting is gaining huge research interest since it provides high power density and has real-life applicability. However, investigative research for the mechanical-electrical coupling phenomenon remains challenging. Many researchers depend on physical experiments to choose devices with the best performance which meet design objectives through case analysis; this involves high design costs. This study aims to develop a practical model using computer simulations and to propose an optimized design for a lead zirconate titanate (PZT)-based piezoelectric cantilever beam which is widely used in energy harvesting. In this study, the commercial finite element (FE) software is used to predict the voltage generated from vibrations of the PZT-based piezoelectric cantilever beam. Because the initial FE model differs from physical experiments, the model is calibrated by multi-objective optimization to increase the accuracy of the predictions. We collect data from physical experiments using the cantilever beam and use these experimental results in the calibration process. Since dynamic analysis in the FE analysis of the piezoelectric cantilever beam with a dense step size is considerably time-consuming, a surrogate model is employed for efficient optimization. Through the design optimization of the PZT-based piezoelectric cantilever beam, a high-performance piezoelectric device was developed. The sensitivity of the variables at the optimum design is analyzed to suggest a further improved device.
URI
https://link.springer.com/article/10.1007%2Fs11664-016-4497-2http://hdl.handle.net/20.500.11754/28256
ISSN
0361-5235; 1543-186X
DOI
10.1007/s11664-016-4497-2
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > AUTOMOTIVE ENGINEERING(미래자동차공학과) > Articles
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