Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 1996.04a
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- Pages.298-305
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- 1996
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- 1598-2548(pISSN)
An Identification Method for Complex-Valued Material Properties of Piezoelectric Ceramics Using Nonlinear Optimization Technique
비선형 최적화 기법을 이용한 압전 세라믹의 복소 재료 정수 규명
Abstract
The common practice for the identification of piezoelectric properties is based on the use of immittance behavior of a resonator with a certain geometry and poling direction. In this paper, a new method is suggested to identify the complex-valued piezoelectric material constants. This method is based on the minimization of differences between the analytical immittance and the experimental measurement of resonator. Non-linear minimization problems are formulated to find out the unknown properties relevant to the resonators. The immittance data used for identification are measured at a number of frequencies which cover the vicinity of resonance frequency and the low frequency region. To illustrate the proposed technique, the complex-valued coefficients are identified for a typical PZT4 ceramic composition.
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