Energy harvesting, based on sources including vibration and thermal gradients, has been exploited in recent years to power telemetry, small devices, or to charge batteries or capacitors. Generating the higher levels of power which have thus far been required to run sensor systems such as those needed for structural health monitoring has been more challenging. In addition, harvesters such as those required to capture vibration often require additional elements (e.g. cantilevers) to be added to the structure and harvest over a relatively narrow band of frequencies. In aerospace applications, where weight is at a premium and vibrations occur over a broader range of frequencies, this is non-ideal. With the advent of new, lower power monitoring systems, the potential for energy harvesting to be utilized is significantly increased. This article optimizes the placement of a set of parasitic piezoelectric patches to harvest over the broad band of frequencies found in an aircraft wing and validates the results experimentally. Results are compared with the requirements of a low-power structural health monitoring system, with a closing of the gap between the energy generated and that required being demonstrated.

中文翻译：

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用于自主结构健康监测的寄生振动能量收集器的优化放置

近年来，基于振动和热梯度等来源的能量收集已被用于为遥测、小型设备供电或为电池或电容器充电。产生迄今为止运行传感器系统（例如结构健康监测所需的系统）所需的更高水平的功率更具挑战性。此外，采集振动所需的采集器通常需要将额外的元件（例如悬臂）添加到结构中，并在相对较窄的频段上采集。在航空航天应用中，重量很重要并且振动发生在更广泛的频率范围内，这是不理想的。随着新的低功耗监控系统的出现，能量收集的利用潜力显着增加。本文优化了一组寄生压电贴片的放置，以在飞机机翼中发现的宽频带上进行采集，并通过实验验证结果。结果与低功率结构健康监测系统的要求进行了比较，并证明了所产生的能量与所需能量之间的差距正在缩小。