The piezoelectric energy harvester efficiency depends on optimizing the cantilever geometry and tuning its natural frequency with vibration source frequency. Moreover, the effect of harvester parameters on natural frequency is vital in tuning the resonance frequency. So, a COMSOL Multi-physics finite element analysis, Eigen frequency study and analytical analysis using MATLAB were constructed to calculate the resonance frequencies and to analyze the harvester parameters effect. Five harvester different shapes, namely, the T-shaped, rectangular, L-shaped, variable width, and triangular cantilevers were optimized using the genetic algorithm. The simulation of the five shapes was implemented using COMSOL. The results indicated that the T- shaped cantilever produced the largest power. Due to its high power and inclusive shape, the T-shaped cantilever with variable width was optimized using the COMSOL optimization module (BOBYQA). Linking genetic algorithm and COMSOL optimization module has highly improved the output power. The COMSOL results were validated using an experimental setup of piezoelectric cantilevers. The experimental setup was employed to calculate the voltage of the base excited harvester with very low excitation frequencies from 0.5 to 10 Hz. Also, the experimental setup investigated the effect of the tip mass, length of the cantilever, and piezoelectric material volume on the output voltage.

压电能量采集器的效率取决于优化悬臂的几何形状以及通过振动源频率调整其固有频率。此外，收割机参数对固有频率的影响对于调节谐振频率至关重要。因此，构建了COMSOL多物理场有限元分析，本征频率研究和使用MATLAB进行的分析分析，以计算共振频率并分析收割机参数的影响。使用遗传算法优化了五个不同形状的收割机，分别是T形，矩形，L形，可变宽度和三角形悬臂。使用COMSOL实现了这五个形状的仿真。结果表明，T形悬臂产生最大的功率。由于其强大的功能和包容的外形，使用COMSOL优化模块（BOBYQA）对宽度可变的T形悬臂进行了优化。链接遗传算法和COMSOL优化模块大大提高了输出功率。COMSOL的结果使用压电悬臂的实验装置进行了验证。实验设置用于计算从0.5到10 Hz的极低激励频率的基础激励收割机的电压。此外，实验装置还研究了尖端质量，悬臂长度和压电材料体积对输出电压的影响。实验设置用于计算从0.5到10 Hz的极低激励频率的基础激励收割机的电压。此外，实验装置还研究了尖端质量，悬臂长度和压电材料体积对输出电压的影响。实验设置用于计算从0.5到10 Hz的极低激励频率的基础激励收割机的电压。此外，实验装置还研究了尖端质量，悬臂长度和压电材料体积对输出电压的影响。