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<p>The limited polarization area, specifically in single patched piezoelectricity and the narrow frequency region in the conventional piezoelectric cantilevers have been adversely affecting the performance of the piezoelectric energy harvesters. To address this issue, multiple non-linear models of the piezoelectric harvesters have already been developed. However, the inadequate analysis of the multi-patched cantilevers is the major hindrance in evaluating the electrical response as well as the resonant frequencies of the harvesters. In this proposed research, COMSOL Multiphysics has been employed in (1) designing, (2) simulating, and (3) analyzing the electrical response of the proposed non-linear novel designs of the dual and tri-patched piezoelectric cantilevers under the influence of several controllable parameters. The resonant frequency of the tri-patched harvester (70&#xa0;Hz) is quite higher unlike the dual-patched structure (i.e., 55&#xa0;Hz) and results accentuate that under the same excitations as well as parametric conditions, a tri-patched piezoelectric energy harvester is the best-fitted model for generating higher electrical output. Consequently, the proposed tri-patched piezoelectric energy harvester produces a maximum 41.784&#xa0;V voltage as well as 72.746&#xa0;mW electrical power, at 70&#xa0;Hz resonant frequency, 4g average excitation, and a resistive load of 12&#xa0;KΩ. Response surface methodology is implied to extract the optimized controllable parameters of the harvesters and the research outcomes are further validated by comparing the maximum generated electrical power with the outputs of available literature models. It is recommended to utilize the tri-patched harvester for low-power miniaturized electronic devices.</p>

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Multi-patched piezoelectric vibrational energy scavenger for miniaturized electronic applications

  • 期刊论文

  • 发表日期：

    2025年3月23日

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  • Farhan Zamir,
  • Muhammad Abdullah Sheeraz,
  • Riffat Asim Pasha,
  • Haris M. Khalid,
  • Hassan Elahi,
  • Muhammad Sohail Malik

摘要

The limited polarization area, specifically in single patched piezoelectricity and the narrow frequency region in the conventional piezoelectric cantilevers have been adversely affecting the performance of the piezoelectric energy harvesters. To address this issue, multiple non-linear models of the piezoelectric harvesters have already been developed. However, the inadequate analysis of the multi-patched cantilevers is the major hindrance in evaluating the electrical response as well as the resonant frequencies of the harvesters. In this proposed research, COMSOL Multiphysics has been employed in (1) designing, (2) simulating, and (3) analyzing the electrical response of the proposed non-linear novel designs of the dual and tri-patched piezoelectric cantilevers under the influence of several controllable parameters. The resonant frequency of the tri-patched harvester (70 Hz) is quite higher unlike the dual-patched structure (i.e., 55 Hz) and results accentuate that under the same excitations as well as parametric conditions, a tri-patched piezoelectric energy harvester is the best-fitted model for generating higher electrical output. Consequently, the proposed tri-patched piezoelectric energy harvester produces a maximum 41.784 V voltage as well as 72.746 mW electrical power, at 70 Hz resonant frequency, 4g average excitation, and a resistive load of 12 KΩ. Response surface methodology is implied to extract the optimized controllable parameters of the harvesters and the research outcomes are further validated by comparing the maximum generated electrical power with the outputs of available literature models. It is recommended to utilize the tri-patched harvester for low-power miniaturized electronic devices.