Bradai Sonia, Naifar Slim, Wolszczak Piotr, Bieniaś Jarosław, Jakubczak Patryk, Rysak Andrzej, Litak Grzegorz, Kanoun Olfa
Measurement and Sensor Technology, Technische Universität Chemnitz, Reichenhainer Straße 70, 09126 Chemnitz, Germany.
Laboratory of Electromechanical Systems, National School of Engineers of Sfax, University of Sfax, Sfax 3038, Tunisia.
Micromachines (Basel). 2025 Mar 30;16(4):410. doi: 10.3390/mi16040410.
A bistable effect on a laminate structure with a piezoelectric patch was tested to harvest kinetic energy. The composite bistable plate was prepared in the autoclave with two different orientations of the glass fibers. The dynamic tests were performed on the universal testing machine using cyclic vertical compression excitation. During the tests, the bottom edge of the plate was clamped firmly while its upper edge was attached with some clearance to enable sliding. In such a configuration, the friction force between the plate and upper clamp element is responsible for the plate excitation. Simultaneously, the plate has enough space to change the shape between the two equilibria. During the harmonic excitation of the testing machine operating mode, a piezoelectric element was placed on the bistable plate and its voltage and normalized power outputs were evaluated. The experiments were repeated with additional mass distribution, which influenced the natural frequency of the plate.
对带有压电贴片的层合结构的双稳态效应进行了测试，以收集动能。复合双稳态板是在高压釜中制备的，玻璃纤维有两种不同的取向。动态测试是在万能试验机上使用循环垂直压缩激励进行的。在测试过程中，板的底边被牢固夹紧，而上边则有一定间隙连接以实现滑动。在这种配置下，板与上夹具元件之间的摩擦力负责激励板。同时，板有足够的空间在两个平衡状态之间改变形状。在试验机运行模式的谐波激励期间，在双稳态板上放置一个压电元件，并评估其电压和归一化功率输出。实验在有附加质量分布的情况下重复进行，附加质量分布影响了板的固有频率。
