The response charge of piezoelectric speed sensors using a conventional rectangular cantilever is low, which also causes a low sensitivity in speed measurement. To improve the sensor sensitivity, a piezoelectric speed sensor based on a streamlined piezoelectric cantilever is employed in this paper.Furthermore, a theoretical optimization model of the sensor based on Bernstein polynomial equation is established, and a simulation optimization flow work is also proposed. With method of moving asymptotes (MMA) algorithm, more charge output can be obtained than before. The simulation results show that the optimized sensor can output a voltage of 416 mV and obtain a sensitivity of 52 mV/m⋅s−1 when the input speed is 8 m/s. As compared with the values of 300 mV and 37.5 mV/m⋅s−1 in the un-optimized case, the improvement in the sensor sensitivity is up to 38%, which confirms the effectiveness of the proposed method.

中文翻译：

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基于PVDF的压电悬臂式速度传感器的优化设计

使用传统矩形悬臂梁的压电速度传感器的响应电荷低，这也导致速度测量的灵敏度低。为了提高传感器的灵敏度，本文采用了基于流线型压电悬臂梁的压电速度传感器。此外，建立了基于伯恩斯坦多项式方程的传感器的理论优化模型，并提出了仿真优化流程。通过移动渐近线（MMA）算法，可以获得比以前更多的电荷输出。仿真结果表明，优化后的传感器在输入速度为8 m/s时，可以输出416 mV的电压，获得52 mV/m⋅s−1的灵敏度。与未优化情况下的 300 mV 和 37.5 mV/m⋅s−1 的值相比，