Material parameter determination of a piezoelectric disc with triple-ring-electrodes for increased sensitivity

Jurgelucks, Benjamin; Feldmann, Nadine; Claes, Leander; Henning, Bernd; Walther, Andrea

doi:10.1121/2.0000707

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Because the objective function already contains a derivative, approximating both derivatives by finite differences is not advisable because it can lead to discontinuities in the objective function's gradient (Jurgelucks et al, 2018). The sensitivities are thus calculated by algorithmic differentiation using an adapted version of the finite element solver by Jurgelucks (Jurgelucks, 2019). Applying a constrained trust region method (Conn et al, 2000) to this problem using the result of the SERA method as initial values yields the configuration shown in Fig.…”

Section: Optimised Electrode Topologymentioning

confidence: 99%

“…Similarly, Unverzagt develops a characterisation procedure using only a single disc-shaped specimen (Unverzagt, 2018) with a threeelectrode structure optimised for increased sensitivity (Kulshreshtha et al, 2015), which is contacted using a network of passive electrical components. This method is improved upon by Jurgelucks (2019) with a revised electrode structure. Dropping the passive electrical network, Feldmann et al…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Inverse procedure for measuring piezoelectric material parameters using a single multi-electrode sample

Claes

Feldmann

Schulze

et al. 2023

J. Sens. Sens. Syst.

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Abstract. An inverse measurement procedure for the determination of a full set of piezoelectric material parameters using a single sample is presented. The basis for the measurement procedure is a measurement of the frequency-dependent impedance of the sample. To yield sufficient sensitivity of this measurement with respect to all material parameters (mechanical, electrical, and coupling parameters), an optimal electrode configuration for the sample is determined before the inverse measurement procedure is realised using a novel topology optimisation approach. After initial estimates for the material parameters are provided by analytical expressions, a sensitivity-based, staged, local optimisation procedure yields material parameters for the sample by fitting the impedance of a finite element simulation model to the measured electrical impedance. Results for different absorption models as well as for different piezoelectric materials (hard, soft, and lead-free piezoceramics) are included.

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Section: Optimised Electrode Topologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inverse procedure for measuring piezoelectric material parameters using a single multi-electrode sample

Claes

Feldmann

Schulze

et al. 2023

J. Sens. Sens. Syst.

View full text Add to dashboard Cite

show abstract

An inverse approach to the characterisation of material parameters of piezoelectric discs with triple-ring-electrodes

Feldmann

Jurgelucks

Claes

et al. 2018

Tm - Technisches Messen

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For its usage in simulation-based design processes a precise knowledge of the employed material properties is inevitable. In the case of piezoelectric ceramics, the provided material parameters often suffer from large uncertainties and even inconsistencies since the standardised measurement procedure needs several specimens to determine a single set of material parameters. In contrast, the presented measurement set-up allows to calculate material parameters using one unique disc-shaped specimen with an optimised electrode topology. Using an inverse problem approach, fitting material parameters can be found using an optimisation procedure.

show abstract

Material parameter determination of a piezoelectric disc with triple-ring-electrodes for increased sensitivity

Cited by 2 publications

References 6 publications

Inverse procedure for measuring piezoelectric material parameters using a single multi-electrode sample

Inverse procedure for measuring piezoelectric material parameters using a single multi-electrode sample

An inverse approach to the characterisation of material parameters of piezoelectric discs with triple-ring-electrodes

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