Tommasino Domenico, Moro Federico, Bernay Bruno, De Lumley Woodyear Thibault, de Pablo Corona Enrique, Doria Alberto
Department of Industrial Engineering, University of Padova, 35131 Padova, Italy.
SONACA, SA, 6041 Gosselies, Belgium.
Sensors (Basel). 2022 Jan 4;22(1):363. doi: 10.3390/s22010363.
Vibration energy harvesters in industrial applications usually take the form of cantilever oscillators covered by a layer of piezoelectric material and exploit the resonance phenomenon to improve the generated power. In many aeronautical applications, the installation of cantilever harvesters is not possible owing to the lack of room and/or safety and durability requirements. In these cases, strain piezoelectric harvesters can be adopted, which directly exploit the strain of a vibrating aeronautic component. In this research, a mathematical model of a vibrating slat is developed with the modal superposition approach and is coupled with the model of a piezo-electric patch directly bonded to the slat. The coupled model makes it possible to calculate the power generated by the strain harvester in the presence of the broad-band excitation typical of the aeronautic environment. The optimal position of the piezoelectric patch along the slat length is discussed in relation with the modes of vibration of the slat. Finally, the performance of the strain piezoelectric harvester is compared with the one of a cantilever harvester tuned to the frequency of the most excited slat mode.
工业应用中的振动能量采集器通常采用覆盖有一层压电材料的悬臂振荡器形式，并利用共振现象来提高发电量。在许多航空应用中，由于空间不足和/或安全与耐用性要求，无法安装悬臂式采集器。在这些情况下，可以采用应变压电采集器，它直接利用振动航空部件的应变。在本研究中，采用模态叠加法建立了振动缝翼的数学模型，并将其与直接粘结在缝翼上的压电贴片模型相耦合。该耦合模型使得在存在航空环境典型的宽带激励情况下，能够计算应变采集器产生的功率。结合缝翼的振动模式，讨论了压电贴片沿缝翼长度的最佳位置。最后，将应变压电采集器的性能与调谐到最易激发缝翼模式频率的悬臂式采集器的性能进行了比较。
