This paper reports, for the first time, experimental evidence of the effectiveness of the frequency-tuning synchronized electrical charge extraction technique (FTSECE) with a strongly-coupled generator. The ratio between the system bandwidth (7 Hz) and the natural bandwidth of the transducer (0.688 Hz) is 1017 %, surpassing previous demonstrations of synchronized charge extraction methods by a large extent. We prove that the bandwidth of the FTSECE system is only limited by the unideal characteristics of the circuit components and generator. This is a major advantage of FTSECE as opposed to other competitive methods where the bandwidth is intrinsically mathematically limited, even in the hypothetical presence of ideal components. We also propose a new circuit for the implementation of FTSECE, which allows the piezoelectric generator to be connected to the same ground as the control circuit. Our experimental setup based on the combination of a strongly-coupled piezoelectric generator and a FTSECE architecture allows operation at a maximum power plateau on a +/-3.5 % interval around the resonance frequency. The resulting full width at half maximum (FWHM) is +/-10 % around the resonance frequency, which corresponds to +200 % compared to most up-to-date architectures designed for bandwidth enhancement, with the advantage of suppressing local minima in the power responses.

本文首次报告了具有强耦合发生器的频率调谐同步电荷提取技术（FTSECE）的有效性的实验证据。系统带宽（7 Hz）与换能器的自然带宽（0.688 Hz）之间的比率为1017％，在很大程度上超过了以前的同步电荷提取方法的演示。我们证明FTSECE系统的带宽仅受电路组件和发生器的非理想特性限制。与其他竞争方法相比，这是FTSECE的主要优势，在竞争方法中，带宽在本质上受到数学限制，即使在假设存在理想组件的情况下也是如此。我们还提出了实施FTSECE的新电路，这样就可以将压电发电机与控制电路连接到同一地。我们基于强耦合压电发生器和FTSECE架构相结合的实验设置，允许在谐振频率附近+/- 3.5％的间隔内以最大功率平稳运行。所产生的半高全宽（FWHM）在谐振频率附近为+/- 10％，与为带宽提高而设计的最新架构相比，这相当于+ 200％，其优点是抑制了带宽的局部最小值。功率响应。