Piezoelectric vibration energy harvesters have demonstrated the potential for sustainable energy generation from diverse ambient sources in the context of low-powered micro-scale systems. However, challenges remain concerning harvesting more power from low-frequency input excitations and broadband random excitations. To address this, here we propose a purely mechanical approach by employing inertial amplifiers with cantilever piezoelectric vibration energy harvesters. The proposed mechanism can achieve inertial amplification amounting to orders of magnitude under certain conditions. Harmonic, as well as broadband random excitations, are considered. Two types of harvesting circuits, namely, without and with an inductor, have been employed. We explicitly demonstrate how different parameters describing the inertial amplifiers should be optimally tuned to maximise harvested power under different types of excitations and circuit configurations. It is possible to harvest five times more power at a 50% lower frequency when the ambient excitation is harmonic. Under random broadband ambient excitations, it is possible to harvest 10 times more power with optimally selected parameters.

压电振动能量收集器已经证明了在低功率微型系统的背景下从不同环境来源产生可持续能源的潜力。然而，从低频输入激励和宽带随机激励中获取更多功率方面的挑战仍然存在。为了解决这个问题，我们在这里提出了一种采用带有悬臂压电振动能量收集器的惯性放大器的纯机械方法。所提出的机制可以在某些条件下实现数量级的惯性放大。谐波以及宽带随机激励都被考虑在内。已经采用了两种类型的收集电路，即不带电感器和带电感器。我们明确展示了如何优化描述惯性放大器的不同参数，以在不同类型的激励和电路配置下最大化收集功率。当环境激励是谐波时，有可能以低 50% 的频率收获 5 倍的功率。在随机宽带环境激励下，可以通过优化选择的参数获得 10 倍以上的功率。