研究目的
To explore the feasibility of using silicon carbide (SiC) as a cantilever base for piezoelectric energy harvesting (PEH) and to optimize the output power through mathematical modeling, simulation, and circuit design.
研究成果
The mathematical modeling and simulations demonstrate that using SiC as a cantilever base for PEH can generate increased output voltage with added proof masses, reducing natural frequency. The versatile precision full wave rectifier circuit provides stable DC output with less ripple. Future work should include experimental validation and optimization of beam shape and size.
研究不足
The study is based on analytical modeling and simulations without experimental validation. The beam size is micro-scale, which may limit practical applications without further miniaturization or testing. The circuit performance is simulated and not tested with actual hardware.
1：Experimental Design and Method Selection:
The study uses analytical modeling based on thin beam theory to derive equations for the piezoelectric energy harvester (PEH). Simulation is performed to verify the models, and an electronic circuit (versatile precision full wave rectifier) is designed and simulated using Multisim software.
2：Sample Selection and Data Sources:
The cantilever beam is modeled with specific dimensions (length 400 μm, width 30 μm, thickness 1 mm for layers) and material properties of SiC. Proof masses are varied in simulations.
3：List of Experimental Equipment and Materials:
No physical experiments are conducted; simulations use software tools. Materials include SiC for the cantilever base and piezoelectric elements.
4：Experimental Procedures and Operational Workflow:
Mathematical equations are derived for voltage output and frequency response. Simulations are run for different proof masses and damping ratios. The rectifier circuit is simulated with components like operational amplifiers and resistors.
5：Data Analysis Methods:
Output voltage and power are calculated from derived equations and simulated waveforms. Transfer functions and harvested power are analyzed using standard formulas.
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